bmandl
Full Member level 4
Hello!
I am designing voltage sensing circuit for 0-100V DC input with voltage divider at aprox. 5V output. But my requirements are, that anything higher than exactly 5V at output shouldn't go further to the ADC. I want to make some kind of a voltage follower and voltage limiter for anything higher than 5V. If there comes signal, higher than 5V, I want to drop that voltage across some resistor and LED for indication. Can I make circuit with decent accuracy with opamp, and how? I drew some kind of a block diagram.
**broken link removed**
I am designing voltage sensing circuit for 0-100V DC input with voltage divider at aprox. 5V output. But my requirements are, that anything higher than exactly 5V at output shouldn't go further to the ADC. I want to make some kind of a voltage follower and voltage limiter for anything higher than 5V. If there comes signal, higher than 5V, I want to drop that voltage across some resistor and LED for indication. Can I make circuit with decent accuracy with opamp, and how? I drew some kind of a block diagram.
**broken link removed**