Fix circuit power problem

I have designed a circuit to keep the heating element at a constant temperature. The digital part of the circuit is being feed from a 5V LDO which is powered by two 18650 batteries in series and the heating element is directly connected to the output batteries. Also heating element wire(approximately 2ohm) is controlled with an N channel low side mosfet by the microcontroller.

When controller toggles the mosfet because of the voltage drop on the supply.

The highest supply voltage for the system is between 6V-8.4V and load uses 2A. The problem is becomes more significant when the supply voltage gets lower. I don't think that any inrush current situation occurs because voltage continues to stay below 5V at the output of LDO as long as the load is active. Also i tried with both batteries(which can supply 20A) and a lab bench power supply but same problem occurs.

Taidot: Piirisuunnittelu, sähkötekniikka, elektroniikka, Mikrocontroller, Piirilevyn asettelu

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Tietoa työnantajasta:
( 0 arvostelua ) Istanbul, Turkey

Projektin tunnus: #21798014

16 freelanceria on tarjonnut keskimäärin 191$ tähän työhön


Hello. you should not use LDO. what is the voltage of VCC when driving mosfet? you need to separate the digital circuit from the mosfet drive , change ADC reference of ATtiny88. more.. Regards.

$140 USD 7 päivässä
(36 arvostelua)

Hello sir. High-quality & Fast-delivery is promised! As a highly skilled senior software and hardware engineer. I can help you perfectly. I am very confident with my skills and I'd like to help your business by doing m Lisää

$500 USD 7 päivässä
(50 arvostelua)

Hello, as your problem description seems to be missing, I have to wager an educated guess: - your microcontroller is sometimes resetting - more often at lower battery voltages. Provided you do not intend to send me y Lisää

$200 USD 10 päivässä
(8 arvostelua)

hello i am a computer engineer,i have masters in computer engineering,i have experience for more than 8 years in arduino and electronics,i have checked the schematic and have known the problem that causes that pwoer Lisää

$80 USD 2 päivässä
(21 arvostelua)

I have more than 7 years experience in circuit design . so I can do your job within a time limit with your satisfaction.

$388 USD 7 päivässä
(6 arvostelua)

Noted! My name is Jaspreet & I'm part of larger embedded hardware and firmware development team. Please share us more details about your project so we can able to provide you proposal with desired solutions. Here you Lisää

$300 USD 7 päivässä
(4 arvostelua)

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$250 USD 5 päivässä
(1 arvostelu)

Dear Client, I am Sr. Hardware Technical Expert with more than 5 years of experience in PCB design and Circuit design, I can guarantee you 100% quality work and before time Delivery. I have an experience on resolving m Lisää

$90 USD 2 päivässä
(2 arvostelua)

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$140 USD 7 päivässä
(0 arvostelua)
$188 USD 7 päivässä
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Hi I'm a qualified Electronics and Communication Engineer. i' currently working in network domain. i would like an opportunity to work on the project. thank you regards Anup Xavier

$200 USD 7 päivässä
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Hello, I am working as a Hardware Design and Development Engineer for the past 8 years. I have debugged and resolved lot of issues which I have experienced during the circuit validation. I have worked in the design whi Lisää

$50 USD 7 päivässä
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$120 USD 10 päivässä
(0 arvostelua)

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$222 USD 5 päivässä
(0 arvostelua)

Hi, I can hepl you on this problem if you contact with me by messages. best regards, ( merhaba, Benimle mesaj yol ile iletişim kurarsanız size sorununuz hakkında yardımcı olabilirim.)

$30 USD 1 päivässä
(0 arvostelua)

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$150 USD 7 päivässä
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