
This low voltage circuit can be used to monitor batteries and other volatile sources of current for problems. The circuit sounds an alarm and lights an LED, but can be interfaced to any number of other circuits for many different uses.
Parts
Part
Total Qty.
Description
Substitutions
R1, R321K 1/4W Resistor
R215K Pot
U11LM339 Op Amp IC
D111N5233B Zener Diode
D21LED
BZ11Piezo...