I have a circuit like this. At the output, a connect 1 ohm to test the circuit. This is because my load has output resistance of 1 ohm.
I give values to DAC via Arduino. For example, when I enter number 5, DAC gives output of 5 Volt. Simplifying that:
The op-amp part is used as feedback for current stability. Main current flows through the MOSFET to the load.
I want to limit output current by using pot. This is for preventing my load if more current value entered to Arduino by mistake.
For example, I connect a load that has maximum current of 3 A. I will enter number 3 to DAC, and adjust pot to limit current to 3. If something went wrong and accidentally pressed 5, there will be no current more than 3.
I have connected my pot in a lot of places but my MOSFET is burned out all of them.
Where should I connect pot/s?
I give values to DAC via Arduino. For example, when I enter number 5, DAC gives output of 5 Volt. Simplifying that:
- Entering 0 corresponds output current of 0 A
- Entering 1 corresponds output current of 1 A
- Entering 3.5 corresponds output current of 3.5 A
- Entering 5 corresponds output current of 5 A etc.
The op-amp part is used as feedback for current stability. Main current flows through the MOSFET to the load.
I want to limit output current by using pot. This is for preventing my load if more current value entered to Arduino by mistake.
For example, I connect a load that has maximum current of 3 A. I will enter number 3 to DAC, and adjust pot to limit current to 3. If something went wrong and accidentally pressed 5, there will be no current more than 3.
I have connected my pot in a lot of places but my MOSFET is burned out all of them.
Where should I connect pot/s?
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