| ??? 08/28/03 13:13 Read: times |
#53572 - RE: Cheap Low Battery Detector using opamps? Responding to: ???'s previous message |
you can try this,
1) for a detector which need digital output, you need positive feedback (a resistor from the output to the non-inverting input). That will a) make a scmitt trigger avoiding fluctuations between ok and not ok. b) make a solid '1' or '0' on the output. 2) when powering the op-amp with +9, you need to clamp the output or the uC pin will pop Erik |
