Cheap Voltage Detector circuit
Cheap Voltage Detector circuit
(OP)
Hello everyone,
I am running the microcontroller on 5V power supply (using the LM7805 regulator). I want to be able to detect the input voltage of the LM7805 when it falls down to around 6V. I don't have any ADC port left on the microcontroller. All I have is a digial input. My goal is to build the simpliest and cheapest circuit possible. Maybe with one transistor and few resistors. Do you have any idea? Thank you in advance!
Best regards,
Thomas
I am running the microcontroller on 5V power supply (using the LM7805 regulator). I want to be able to detect the input voltage of the LM7805 when it falls down to around 6V. I don't have any ADC port left on the microcontroller. All I have is a digial input. My goal is to build the simpliest and cheapest circuit possible. Maybe with one transistor and few resistors. Do you have any idea? Thank you in advance!
Best regards,
Thomas





RE: Cheap Voltage Detector circuit
That is as cheap as I can do it accurately.
RE: Cheap Voltage Detector circuit
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RE: Cheap Voltage Detector circuit