37v lithium ion battery charger circuits työt

...various applications, including web, print, and digital media. Target Audience: - Small to medium-sized businesses seeking digital transformation. - Startups looking for comprehensive digital solutions. - Entrepreneurs and business owners interested in expanding their online presence. Design Inspiration: - Clean and modern design aesthetics. - Incorporation of digital elements such as pixels, circuits, or abstract shapes. - Exploration of typography to convey a sense of technology and innovation. - Minimalist approach with bold and impactful elements. Color Palette: Primary Colors: Preferred: Blue , Orange , Purple Typography: - Fonts should be modern, sleek, and easily legible. - Sans-serif fonts preferred for a contemporary look. - Consideration of custom typography to ...

I am searching for an accomplished electrical engineer and coder who possesses advanced technical abilities in circuit design, analysis, and programming microcontrollers, namely with Raspberry Pi. These skills are necessary for the fruitful completion of the project. Key Responsibilities: - Design creativeness is a must as I place an emphasis on compact-sized micro-circuits. - Robustness is critical in order to effortlessly connect to external devices. - Implementing GPIO pins for sensor integration requires comprehensive expertise. - Responsibility includes diagnosing and troubleshooting electrical systems when the need arises. The successful freelancer will ideally have substantial experience in Python as this is the preferred programming tool for this project. The end goal is ...

I'm in need of a professional designer who can create captivating packaging for data cables and charger adapters. The design should appeal to a broad audience, encompassing all age groups. Key Requirements: - Create engaging, eye-catching packaging that appeals to a wide demographic. - Ensure the design reflects the high-quality nature of the products. - Design style is open-ended, giving you creative freedom to impress. Ideal Skills and Experience: - Proven experience in packaging design, ideally for tech accessories or similar products. - Understanding of design principles for appealing to all age groups. - Ability to create original, engaging designs that stand out on shelves or in online stores.

I'm in need of an expert to design a site plan for a Level 2 EV chargers. Key Requirements: - Analyze existing property blueprints and create ev charger plan with load balancing for 20 chargers. - Ev charger plan must include: Cover Sheet, site plan, electrical site plan, parking layout and details, single line diagram, schedules and Notes and T24 compliance forms. Experience: - Experience in EV charging station design. - Experience in load balancing for multiple chargers

...light. - Once the Arduino detects that the warning light is on, it must signal for another light to blink. -I want to splice into another warning light on my car instrument panel and use the power feed on that as my input signal for the arduio - I prefer the blinking pattern to constitute 5 blinks, followed by going out. -I can power the board from a 9v battery if using the voltage from the car is too dicey. I don't mind if the battery runs out quick - Final output should be a detailed project scheme, the respective Arduino code for this light blink setup, and instructions on how to assemble...

...with the primary goal being to increase manufacturability. The improved design should reflect in the product's portability, energy efficiency, resistance to weather, and extended battery life. Ideal Profile: - Experience in Product Design - Understanding of Efficient and Durable Design Principles - Knowledge of Power Management for Electronic Devices Your role will involve: - Reengineering the product design for better manufacturability without compromising on aesthetics or functionality - Incorporating features that improve portability, energy efficiency, resilience to weather conditions - Enhancing the battery life of the product. Your contribution will significantly shape the efficiency and user-friendliness of our high-demand enterprise advertisement product....

***PLEASE NOTE I AM NOT INTERESTED IN RANDOM DESIGNES FROM OTHER BUSINESSES - I WILL BLOCK THE FREELANCER - ONLY SUBMIT DE...Title of position within company: Car Electrician The card should also have space for: Phone number xxxxx email xxxxx Location : City XXXX The card should also show some information regarding services we offer which is: - Key Programming & Cutting - Unlocking Hidden features - Diagnostic & EML clearing - Software & Module updates - Retrofit Equipment - Engine Tuning DPF, EGR & IMMO solutions - Battery Registering - ECU Cloning - Airbag Programming - ****PLEASE NOTE THE FINAL DESIGN WILL NEED TO BE IN 2 LANGUAGES TRANSLATION AND OTHER INFORMATION WILL BE PROVIDED TO WINNING DESIGN***** design is to remain same just the text / logo will be tran...

...professional to assist me in implementing distributed secondary control using Simulink. I want you to simulate this project in Matlab Simulink. I will need the simulation files as well. - The main purpose of the project is to ensure the stability and reliability of the microgrid through an effective distributed secondary control mechanism. - The microgrid comprises of Solar PV, Generator, and a Battery storage system. - The primary power quality issues that require addressing are related to voltage and frequency. - I'll need you to explain the project design once you are done on zoom call or something as I need to write my thesis on this so I'll need know all the details about the project. Ideal skills and experience for this project include: - Proficiency in Simu...

I'm looking for a 5kW solar inverter specifically designed for residential usage. It should be equipped with a battery backup system to ensure continuous power supply during outages. Key Requirements: - 5kW Power Output: The inverter should be capable of handling 5kW of power, suitable for residential usage with inductive loads. - Battery Backup Compatibility: It must be designed to work with a battery like lead acid and LifePO4 battery of 48V which will be a 16 string LifePO4 battery.. This is crucial for ensuring uninterrupted power during times of outages or low sunlight. -Tgere whouxl be an lcd screen to do settings and check status. - Residential Suitability: The inverter should be designed for residential environments, taking into account fa...

I'm in search of a skilled developer who can help me design a Battery Management System (BMS) for Lithium-ion batteries. The primary functions of the BMS will be to monitor the health of the battery, control its charging and discharging, and ensure its safety. Key Requirements: - Experience in developing Battery Management Systems - Proficiency in Bluetooth communication protocols - Understands the specific needs of Lithium-ion batteries and how to optimize their performance - Capable of integrating safety features into the BMS to prevent incidents like overcharging or overheating The successful candidate will need to be able to work closely with me to understand the specific requirements of the BMS and design a system that meets thes...

I'm looking for an architect to design building plans for an 18 foot habitation box for my expedition vehicle, ensuring it's equipped with all necessary systems for a comfortable journey. Key Points: - **Power System:** It's crucial that this habitation box has a reliable and versatile power system. I need it to include solar panels, a battery bank, and a generator. The architect should ensure that these systems are integrated seamlessly within the design, considering factors like space, weight distribution and ease of access for maintenance. - **Water System:** The design should factor in space and weight considerations for the habitation box's water system. I'd like to have a freshwater tank, greywater tank, and a water filtration system included. The a...

I'm looking for a math expert who can help me solve calculus problems related to electrical circuit analysis. The ideal candidate should have a good understanding of calculus, particularly in the context of electrical circuits. Key Requirements: - Proficiency in solving calculus problems - Understanding of electrical circuit analysis - Comfort working with circuits involving capacitors and inductors Experience with advanced calculus and electrical engineering is a plus. Your job will be to solve complex calculus problems within the context of circuits with capacitors and inductors. If you have experience or knowledge in this area, please don't hesitate to bid.

I require a skilled 3D designer to encapsulate a small wearable device with key inclusions of a battery compartment, USB C, and Micro SIM. The purpose of the design is to accommodate an IoT device, ensuring it remains sleek and compact. The utmost importance is placed on the dimensions, so the final design must have a footprint similar to that of a smartwatch. 30 x 30 x 10 mm. Key Skills and Experience: - Proficiency in 3D design software - Prior experience with wearable devices - Understanding of IoT device encapsulation - Ability to work with compact, small-scale designs

...thermal analysis and simulation to work on a project related to Li-ion batteries. I have already done some work. I don't know about battery modeling on ANSYS Fluent. I am trying to mimic TR using a thermal model. The geometry and the parameters are taken from the research paper (the research paper is attached). I propagated TR using a user-defined function (UDF) on ANSYS Fluent, but I couldn't get a higher cell temperature than the one mentioned in the paper. The UDF contains the data points and Time extrapolated from the research paper (Fig. 5). The heat generation is calculated using q''' = rho*Cp*dT/dt. (The work should be done on ANSYS Fluent). Key Tasks: - Conduct detailed thermal analysis and simulation on a Li-ion battery....

I'm seeking a talented freelance designer to put together a compelling project presentation. It's objective is to pitch a product - a sustainable green energy battery for electric vehicles (EV). The main audiences are investors and the general public. Key work includes: - Crafting a cogent narrative that thoroughly explains the product benefits - Preparing visually pleasing slides to enhance understanding and impact - Ideally, turning technically complex concepts into accessible information. You'll need to have: - Strong background in design with a portfolio showcasing your previous project presentations - Knowledge or interest in sustainable energy and EV technology - Exceptional writing skills to convey ideas clearly and compellingly - Experience in preparing pr...

I'm in need of a proficient and experienced electrical engineer to design an analog audio circuit for mixing multi-channel signals sourced from line level feeds. This will require expertise in designing robust and low-noise analog audio circuits capable of dealing effectively with multiple audio inputs. Ideal Skills and Experience: • Proficiency in electronic circuit design, specifically analog audio circuits. • Experience with handling multi-channel signals. • Familiarity with line level audio signal processing and mixing. We need an engineer with deep experience in high-end analog circuit design using low noise operational amplifiers. We will provide basic diagrams and objectives. The project involves high quality op amps and line drivers for an audio...

...E-Bike controller. This E-Bike controller should be capable of handling the following features: - Speed Control: The controller should have functionality to manage speed, with a maximum limit of 20 mph. - Battery Monitoring: The controller must include a system that allows for the continuous tracking of a Lithium-ion battery usage. - LCD Display: The controller should be equipped with an LCD display that visualizes the battery status and speed settings. It is essential the freelancer working on this project has experience in product design and engineering, with a strong familiarity in Lithium-ion batteries and how they function within e-bikes. Knowledge of LCD functionality is also necessary. Your attention to detail and careful conside...

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... The webapp should be responsive, adapting seamlessly to both desktop and mobile platforms. Key Features: - Show the shortcuts and everything on the initial screen. The location, car color, battery and other params should be able to be set from parameters - Climate Control System: The webapp should have a user-friendly interface for adjusting the car's climate control settings. - Navigation System: Implement a detailed and interactive navigation system. It does not need to work 100% but feel and look like maps. - Battery Status: A central feature of the webapp should be the ability to view the battery status, and navigate to different sections of the menu with ease. Ideal Skills: - Proficiency in ReactJS for a smooth and responsive user interface. Angular is ...

I'm in need of ...The circuit should handle a maximum current of 500mA, ensuring the LED lights operate efficiently. - Input voltage range: The circuit needs to be compatible with an input voltage range of 12-24VDC. The ideal freelancer for this task should have experience with: - Custom circuit design: Designing circuits to meet specific voltage and current requirements. - LED lighting: Understanding of LED power requirements and compatibility with different circuitry. - Voltage regulation: Ability to design circuits that efficiently regulate voltage within a specified range. - Experience with diodes: Understanding diode functionality is required as the circuit will involve 4 diodes. Please provide details of your experience with similar projects and how you intend ...

I'm looking for a skilled professional who can design a compact, efficient, and reliable battery pack and Battery Management System (BMS) for a body-worn application. The task involves creating a solution with the following specifications: - **Capacity**: The battery should provide a runtime of up to 2 hours on a single charge. - **Chemistry**: The preferred battery chemistry is Lithium-ion. - **Compact & Lightweight**: Given that this is a body-worn application, the design should prioritize being safe to the human, small and lightweight. - **Safety**: Fast charging is needed but the design must include safety mechanisms to prevent overcharging and overheating. -**Waterproof**: The battery pack should be IP65 rated to be usable in ...

I require a couple of photorealistic renders of a product using a high-resolution image from my step file. This rendering is going to be used for product visualization purposes. Please provide a render of the cabinet front on (with the door closed), a render of the cabinet with the door open from a slightly offset perspective, and a render of an individual battery module also from a slightly offset perspective. Key Requirements: - The step file already contains all necessary details including colors and materials to be used in the rendering. Ideal Skills: The ideal freelancer for this project must have a strong understanding of graphics and rendering techniques capable of producing high quality, photorealistic images. Experience in creating product visualizations from step fi...

... - **Medical History Tracking**: The software must provide an efficient way to maintain and access a patient’s past medical records. Experience in designing such systems is desired. - **Lab Test Results Tracking and Clinical Notes**: The system needs to integrate functionality for tracking lab test results and clinical notes within each patient profile. For example, monitoring the changes in Lithium levels in the blood over the course of the treatment. Your skills to incorporate complex features into a simple design will be crucial. - **User Interface**: The user interface should be straightforward and intuitive to ensure ease of use for non-technical staff. Past projects showcasing such design implementations will be valued. Additionally, we require reminders and alerts...

I am seeking a talented and experienced UX/UI designer to conceptualize and create a clean, minimalistic mockup for a user interface akin to the one at to measure lithium levels and control them. Use this first video mockup as reference Key Functionalities Required: - A robust search feature - A powerful product comparison tool - Efficient user account registration Design & User Flow: The design should be lean and clean, echoing the spirit of minimalistic aesthetics. Moreover, the user flow should be linear, meaning that users should be guided step-by-step through the interface. Ideal Skills: - Proficiency in minimalistic UX/UI design - Experience with designing

Looking for an experienced 3D designer to help create a small (less than 10cm) prototype box made of plastic. This project will require the ...help create a small (less than 10cm) prototype box made of plastic. This project will require the placement of five holes on the side surfaces of the box, strategically located for circuit adaptations. Requirements: - Knowledge and expertise in 3D design and plastic materials - Ability to accurately place specified holes on side surfaces - Experience in creating designs intended for prototype circuits - Prior experience with similar projects is a plus Your designs will contribute significantly towards the functional prototype of our circuit device. Looking forward to working with someone who can bring their creativity and precision to thi...

I'm looking for a creative electronics engineer who can design an innovative toy car. The target age group is 7-10 years old, so the design should be engaging and safe for this age range. Key Requirements: - Design:...Circuit: The design should include a well-crafted electric circuit. - Components: I need assistance in selecting the right components to ensure the design is cost-effective without compromising on quality and safety. Ideal Skills and Experience: - Experience in designing toys, particularly for the specified age group. - Proficiency in electronics engineering, particularly in designing electric circuits for small devices. - Familiarity with sourcing cost-effective but reliable electronic components. Please include samples of previous designs or relevant experien...

I am looking for an experienced electronics designer to create a power supply circuit board. This project requires a detailed understanding of circuits and experience working with discrete components. Your responsibilities will include: - Designing a power supply circuit board that meets my specifications using discrete components. - Providing a detailed explanation of your design, so I can understand how it functions. Ideal candidates should: - Have experience designing circuit boards, specifically power supply boards. - Be proficient with discrete components. - Have the ability to explain highly technical concepts in a manner that I can understand. Looking forward to seeing your bids! its a small constant current supply for LED Light, with input 230v AC and output 45v DC 20...

...educational video. The primary focus will be on the basic operations of lithium-ion batteries, coupled with illustrative aspects of how cooling systems work in sync with these technologies. Key Features: - 3D Animation: Highlighting a 3D animated view of the battery's structure and operation. - Basic Overview: The video should simplify the complex science of lithium-ion batteries and their cooling system into an easily digestible overview. - Target Audience: The video will serve as an educational tool for college students, so the content should be academically accurate, yet easy to understand for non-experts. Ideal Skills and Experience: - Previous experience creating animated educational content. - Understanding of lithium-ion batt...

I have a hub dynamo installed on my bike and I'm looking for someone to wire it up to power both front and rear lights, as well as a USB charging port. I'd like the setup to be ready ASAP. Located South London. Key requirements include: - Wiring the hub dynamo to power both ligh...include: - Wiring the hub dynamo to power both lights and a USB charging port - Ensuring the lights are correctly set up for front and rear - Installing the USB charging port in a convenient and accessible location It's important that the setup is both functional and durable. I'm looking for a professional who has experience working with bike dynamos and electrical systems. Experience with USB charger installations is a plus. Needs soldering experience and be able to do

As I'm venturing into a solar-powered USB module in my circuit design utilizing a SAMD51 microcontroller, I'm in need of expert assistance to address some issues with my current PCB design. I ...unresponsive USB output. These are the primary targets for debugging and solution creation. - Ideal Expertise: I am seeking an experienced engineer knowledgeable in PCB design, solar power modules, and the SAMD51 microcontroller. The individual must have a track record of troubleshooting and resolving power supply issues, microcontroller mismatches and USB output problems involving solar-powered circuits. Proper debugging skills, efficiency in prototyping and insightful recommend improvements are critical. By undertaking this, the aim is to obtain a viable, and fully functioning...

I'm looking to create a fault detection and current limitation system using MATLAB for power systems with 3 or 14 buses during short circuits. I need the system to: - Detect faults in real-time - Identify fault currents - Suggest or implement mechanisms to limit these currents such as circuit breakers - Ensure system safety and reliability - Provide guidance on how best to limit these fault currents during short circuits.

I'm seeking a skilled Autocad designer to produce 7 realistic images of prismatic battery modules. The images should: - Be highly detailed with textures and materials - Present the modules from a disected view Ideal candidates should have experience in creating technically detailed images, and have a strong grasp of Autocad's capabilities. Previous experience in designing battery modules or similar technical components would be a major asset.

I'm seeking a skilled Arduino developer for a basic level robotics project. The primary tasks for this role will include coding and troubleshooting hardware. Key requirements: - Skilled in writing Arduino code - Able to troubleshoot hardware issues - Experience in basic robotics projects The purpose of the project is to create a basic level robotics system using...include coding and troubleshooting hardware. Key requirements: - Skilled in writing Arduino code - Able to troubleshoot hardware issues - Experience in basic robotics projects The purpose of the project is to create a basic level robotics system using Arduino, which involves simple movements and operations. The ideal candidate will have a good understanding of robotics, and experience in designing circuits would b...

I need a mechanical engineer with experience in product enhancement to improve the design of a wearable exoskeleton robot product. Key aspects to be addressed include: - Improving the adjustment and attachment aspects of the product, specifically in relation to Straps and fasteners, Joint movement range, Comfort padding, IP65 rating, Battery pack integration, Electronics and wiring integration, Adjustment to waist width and depth. Ideal skills: - Strong mechanical engineering background - Experience in product development - Proficiency in working with wearable technology products is a big plus - Knowledge in ergonomics, performance enhancement, and aesthetics - Ability to understand and meet user needs through custom adjustments I'm looking for someone who can combine ...

I'm seekin...main task involves creating a system capable of monitoring and optimizing two key parameters: the power output of a generator and the state of charge (SoC) of the battery within the microgrid control system. Ideal candidate will have: - A strong background in reinforcement learning. - Proven experience with microgrid systems. - Understanding of energy management, specifically load shedding, power scheduling, and voltage regulation. Expected outcomes of this project should include: - A sophisticated microgrid control system capable to adapt within changing conditions. - Real-time optimization of the generator's power output and battery SoC. - Efficient control actions to manage and balance energy resources. Please provide examples of similar projects...

I'm in need of a talented designer who can create a custom case for a digital stop watch that will primarily be used for sports timing. Key Requirements: - The case should have an ergonomic grip, similar to that of a Seiko S141. This is crucial for comfortable handling during sports activities. - The design must be compatible with micro boards, a battery, and an OLED display. I would like to use Arduino pro micro and a small 1.5" display Ideal Skills and Experience: - Proficiency in product design and CAD software to develop the case model. - Prior experience in designing sports equipment is highly preferred, to ensure the final product meets the specific requirements for this kind of usage. - Knowledge of materials to be used in manufacturing for both durability and com...

I'm seeking an individual with proficiency in RTL (Register Transfer Level) to assist in understanding the architecture and designing integrated circuits. Especially ones who can simplify complex concepts. Your tasks include: - Sharing previous experience in hardware, specifically in integrated circuits - Providing detailed explanation about the architecture designed using RTL - Answering queries related to integrated circuit design using RTL The ideal freelancer should possess: - In-depth knowledge of RTL language - Strong understanding of integrated circuit design - Ability to translate technical jargon into simple language - Demonstrated experience in the hardware field Please, share examples of your previous work related to integrated circuit design using RTL when...

I'm in search of a talented logo designer to create a minimalistic logo for my local Irrigation business. Key Requirements: - I'm looking for a minimalistic style in the design, so please ensure your portfolio supports this type of work. - The logo should include water droplet and sprinkler eleme...water droplet and sprinkler elements. These are key to the representation of my business. - The color palette should be centered around Blue, Green, and Orange, so your ability to work with these colors will be essential. options interested in seeing with the sun ☀️, grass and water ? on logo! Sunburst Irrigation Above the Irr(i)gation water spray for the I that’s in brackets. Grass under the ion in Irrigation. Sun ☀️ rays (golden orange ? like a flame) off of the...

3d animation of battery containers on a barge

I need an expert in renewable energy and optimization in Matlab to help me with a specific project. The project focuses on the optimization of energy storage systems, with a specific focus on batteries. Key tasks include: - Utilizing Matlab to model and ...determine the most efficient storage configurations. - Analyzing and interpreting the results to provide practical and insightful recommendations for energy storage optimization. The ideal freelancer should have: - Proficiency in Matlab and experience in the field of renewable energy. - Proven experience in optimization, preferably with a focus on energy systems or similar. - Specific experience with battery energy storage systems would be highly beneficial. - Strong analytical skills to interpret results and provide actionable...

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I have an STL file for a battery box. It consists of a bottom and a top part, that are connected with a simple hinch. On the other side the box is being closed with a latch, see blue circle in image. The problem is that this latch is breaking off because it is not sturdy enough or the tolerances are just too tight so you have to apply too much force to open the box. Please send an STL and ideally a step file that fixes this problem. This is for 3D printing with FDM printer. For an experienced designer this should be quite easy, I think. Looking forward for your offers. Thanks!

...needs to be merged in a comprehensible and engaging manner. - The functionalities of both sites must be inherent in the final product without any glitches. Ideal skills: - Proven web development skills - Website design expertise - Proficiency in handling graphics - Content management Websites: Lizard Energy works with Renewables (Solar Panel, Battery storage etc..) and Electricnezz with main electrical jobs. Lizard content needs to be added into Electricnezz content as Electricnezz will remain and Lizard energy site will eventually close. ** Happy to use have any new ideas/themes that makes easier for this combination to happen as long as it looks great! Main site is wordpress based, but I don't mind how it's done as long as it's manageable

I'm looking for a skilled pr...feature, especially for indoor use, where precision and control are needed. - Emergency Stop Feature: In case of any emergencies, the ramp should come with a quick and effective stop mechanism. Ideal Skills: - Mechanical Engineering: A deep understanding of mechanical principles and experience in designing lifts and ramps is required. - Electrical Engineering: Knowledge of electrical systems and circuits, especially for designing the start-stop button. - Product Design: Experience in designing user-friendly, compact, and practical products for indoor use. - Safety Compliance: Knowledge of safety standards and regulations related to lift and ramp design. I'm looking for a professional who can deliver a safe, reliable, and convenient solut...

PCB design for a scale with a 4G module to send results to WebServer using HTTP Post. Circuit is intended to be powered from battery with a support of solar panel. MCU will STM32 and 4G GSM module will using SIM7000

...industrial product design, especially joystick controllers and driver units. - Experience in medical technology will be a valuable asset. - Knowledge in wired communication protocols like UART is essential for the job. the most important detail of the project as follow : A-the part we already done and proven its functionality : 1-the wheelchair are driven by dual DC motors and power with 24 volt battery. the dc motor and the mechanical part of the wheelchair already manufactured and tested. B- the part we need you to accomplished with industrial standers : 1- the complete schematic ,BCP and the manufacturing Gerber file . 2- the complete firmware code. information about the unit : 1-we had a joystick with driver that can help interesting candidate for reverse engineer. t...

I am in search of an astute grant writer to assist me in procuring funds needed to upgrade our police radios. The upgraded radios are expected to enhance officer safety. Main areas we aim to improve include: - Range capability - Audio quality - Battery life These upgrades will be used by 10-50 local police officers, thus ensuring their efficient communication and overall safety. Ideally, prior experience or understanding of law enforcement communication systems will be beneficial. We are committed to better serving our community, and this upgrade plays a pivotal role in achieving that. Your contribution would significantly impact the daily operations of our force, making you an integral part of community development.

...through App menu Before using the app kindly check if below 4 step app configuration is done well. 1. Check if you have latest version of app with you. If not download the latest version from Play store. 2. Check if all the required permission given to app like GPS, Camera, Files and photos. GPS permission should be in “always allow” mode 3. GPS location should be set on High accuracy 4. Disable battery optimization for this app....

Here is a brief description of my project. (Please note: I will not reply back to auto response messages. Also please post the actual price not a price just to get my attention.) My project consists of two items. Part A: Part A has a single function that function is to transmit a signal. The part needs to be housed in a waterproof container and be powered by a rechargeable battery preferably through USB. This part will actually go on a dogs collar. The device can either transmit vi. RF, USB or any other short range signal. Part B: Part B its job is to have two functions. The first function is to receive a signal from Part A, the second job of Part B is to transmit a specified RF signal to Part C when Part A is within 2 to 3 feet of Part B. Part B, needs to also be housed in a wat...