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.
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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.
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
I have made a great fortune troubleshooting and repairing [login to view URL] task requires a simple redesign of some parts of the project and everything will be set to go...I will be happy to help you on this one
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.)