Add Dry Contact and rechargeable capacitor solution to the existing electronic PCBA board

Purpose of the project is to adjust existing board with speaker (board is connected to power outlet):

1. To add Dry Contact ON/OFF switch ( See point 1 on the sketch) (possibly to the speaker connection on existing board). When speaker is ON that will activate dry contact switch to be ON as well, when speaker is OFF switch to be also OFF. Dry Contact switch should be power isolated from dry contact on additional board i.e. cannot have power at the output, but triggers dry contact on the other board. (Preference is to use one dry contact switch for both existing and additional board if possible).

2. To add charging board ( see point 3 in the sketch) with rechargeable capacitor ( see point 2 on the sketch )(or at least two rechargeable AAA batteries) to serve as a backup in case of power outage. Capacitor needs to provide backup power to both existing board and one additional board. Voltage to the additional board have to be adjustable to 2.4V and to 3V and to Amperage of 800 mAh AAA battery. Power requirements of existing board to be determined.

Freelancer/Contractor needs to sign NDA before commencing the work and more details are provided, and (if needed) Freelancer/Contractor must be able to design and/or replace existing relatively simple board with speaker.

Note that additional board is currently using either 2.4V or 3V batteries and has to be adjusted to use US power outlet as a primary source of power (see sketch section "Current to improve in attachment Board_Dry_Contact2.JPG instead of incorrect one Board_Dry_Contact1.JPG initially posted) and rechargeable capacitor (or batteries as a backup).

Taidot: sähkötekniikka, elektroniikka, Piirilevyn asettelu

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Tietoa työnantajasta:
( 2 arvostelua ) Toronto, Canada

Projektin tunnus: #12950500

Myönnetty käyttäjälle:


Hi, I have designed a few wearable and medical electronics. I am confident I can meet your needs in short term. In case I am awarded the work, I would like to design and test the circuit and ship it to you. Lisää

$444 CAD 10 päivässä
(2 Arvostelua)

12 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Kindly reply back and let us discuss project further. regards

$600 CAD 4 päivässä
(76 arvostelua)

Hi Sir I am an expert electronics engineer with more than 8 years of experience in this field. Please have a look at my profile to see the reviews of my previous employers . I can provide you solution to all the pro Lisää

$550 CAD 5 päivässä
(224 arvostelua)

Hi, I am a post graduate power electronics engineer and having very good industrial experience of 8+ years in R&D and project development. I am excellent welding power supplies design, high frequency transformers desi Lisää

$777 CAD 15 päivässä
(59 arvostelua)
$555 CAD 10 päivässä
(9 arvostelua)

I am a professional electrical engineer from the oldest and most reputable engineering institute of Pakistan(UET Lahore).My expertise are 1. Circuit design, Digital Logic design, Communication Systems, Microwave Engi Lisää

$1500 CAD 40 päivässä
(47 arvostelua)

Hello. The circuits that you have attached is really in low quality. I have a couple ideas how to solve your problem, but i should know the requirements for size and power consumption.

$333 CAD 20 päivässä
(10 arvostelua)

● From whom have you been getting similar kind of work done? What happened to that person? ● ...has studied this entire project description and reasonably know your requirements if insufficient you might need to ela Lisää

$2777 CAD 25 päivässä
(6 arvostelua)

I am expert writer, good designer , engineer and programmer. i am sure i can do your task better than any other person. you will get 100% accurate work before deadline. kindly award me this project. thanks in advance.

$250 CAD 2 päivässä
(0 arvostelua)

The work sounds simple enough, but the sketch you refer to in the description wasn't included in the proposal. I'd like to see the schematics of the existing board if possible. Signing a mutual NDA before any discussio Lisää

$650 CAD 10 päivässä
(0 arvostelua)
$555 CAD 10 päivässä
(0 arvostelua)

A proposal has not yet been provided

$333 CAD 3 päivässä
(0 arvostelua)