Battery Check | Electronic Project Circuits

Posts Tagged ‘battery check’

Battery Low Voltage Detector using IC 8211

This circuit can use with power supply since 5 volt until 25 Volt. When voltage of power supply or battery agree come to lower location level keeps. It make LED bright show know. Although the circuit this use how many is the equipment not, but there is the stability and accurate in good moderately work. Because of use IC Voltage Detector 8211 that bring build be Voltage Comparator Circuit. Which have Voltage Comparator at certainly stay within the integrated circuit. Using fines to decorate VR1 give Volt tall more Voltage Comparator The a little when level Battery Volt lower LED as a result bright suddenly.

1 comment - What do you think? Posted by admin - November 18, 2008 at 8:24 am

Categories: Battery, Detector, Meter Tags: battery check, Comparator circuit, Voltage Detector

Battery 1.5V or 3V Monitor using LM3909

We come to add LED Flasher for Monitor the electric current of battery 1.5V and 3V. By use the integrated circuit LED Flasher or Oscillator. By the rate something flasher equal to 2V. This circuit eats electric a little current poor age the work of battery long can’t be like be usable. If friends use battery 3V as a result liberate pin 1 float keep. I hope that a friend may apply with Battery 1.5V or 3V Monitor Circuit , please sir.

Be the first to comment - What do you think? Posted by admin - September 17, 2008 at 7:22 am

Categories: Battery, Meter Tags: battery check, LED Flasher, led voltage indicator, LM3909

Low Voltage Battery Monitor by LM339

This low voltage circuit can be used to monitor battery 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.

Description
R1, R3 2 1K 1/4W Resistor
R2 1 5K Pot
U1 1 LM339 Voltage comparator 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.

Source: http://www.ubmthai.com/leksoundsmf3/index.php?topic=6029.30