R1, R3 2 1K 1/4W Resistor
R2 1 5K Pot
U1 1 LM339 Op Amp IC
D1 1 1N5233B Zener Diode
D2 1 LED
BZ1 1 Piezo Buzzer
MISC 1 Board, wire, socket for IC
Notes
1. The circuit will operate from 9V to 12V.
2. Adjust R2 until the alarm goes off at the correct voltage.
No comments:
Post a Comment