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A PID controller is a (closed) control loop feedback mechanism. It is used in industral control for proportional, integral and derivative feedback.

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4-20 mA PID controller PCB layout

I have designed a 4-20 mA PID controller using an ATmega328P, an MCP4922 (DAC), and an XTR115UA (4-20 mA current loop transmitter). I used the circuits proposed in the datasheets and the PCB and schem …
reza moslemi's user avatar