# Is there anyway to detect lowest voltage of a signal like capacitor and diode do for the high one?

Is there any simple (not the best one) way to detect the lowest value of a signal, like a diode and capacitor detect the peak value, I want to do it for detect the lowest value of a signal.

• You should basically just reverse the diode. – Justin Sep 30 '15 at 19:37
• So you have to first charge the capacitor to the max value right? isnt there any problem with current flowing in that direction? – Pulse9 Sep 30 '15 at 19:39
• Can you put up the schematic you're thinking of? – Justin Sep 30 '15 at 19:41
• Look for a peak detect circuit. (the "peak can have either polarity... you'll have to reverse the diode as Justin said.) – George Herold Sep 30 '15 at 19:42
• What do you mean by"lowest value"? - Do you mean the most negative value or the lowest level of an AC signal such as audio? – Kevin White Sep 30 '15 at 20:27

Press and release the START button when you want to monitor the circuit. MIN will be the minimum voltage output (less the forward diode drop) since start was last released.