reset circuit design

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canarybird33

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hello
How could I design a reset circuit for below circuit?(both load and MCU must be reset)
I'll appreciate if you get some tutorials about designing reset circuit
 
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What is defined as 'reset' condition for your circuit?

What is the intention of the 'load' circuit? It looks like a variable heat source (RV2, Q3) with a fixed current.

What is the MCU you are using?
 

I would use one of the many off the shelf single-IC watchdog and reset devices, available from many semiconductor suppliers, which have plenty of housekeeping features.

For instance: DS1706L
 

Gorgon said:
What is defined as 'reset' condition for your circuit?

What is the intention of the 'load' circuit? It looks like a variable heat source (RV2, Q3) with a fixed current.

What is the MCU you are using?
Click to expand...

I want to put a key for circuit to restart the whole circuit(turning off and then on power)
I use AVR(MEGA8)
The LOAD is a Thermistor which is showed as a Potentiometer in picture
 

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