Projects › Projects › capacitive liquid level measurement using LM324 › The problem is, the supplied
April 5, 2012 at 5:30 am #7393
The problem is, the supplied souce must be in AC form in order to make capacitor circuit work, but the output of LM324 presented in AC form too. This make me cant connect the output directly to the input of PIC16F877A. I hav tried to add full wave rectifier, but the output eventually remain unchanged ( eventhough i keep varying the capacitance of the probe).