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:: Home » Level voltage indicator

Level voltage indicator

Low Voltage Battery Indicator circuit using LM339

Last Updated on: October 21, 2022 by Apichet Garaipoom
Low Voltage Battery indicator circuit

The simple low voltage tester circuit using LM339,can use Battery voltage monitor for voltage sources that problems, by LED display and alarm sound. Read more

Categories Meters & Detectors Tags Battery Testers, Electronic buzzer, Level voltage indicator 12 Comments

6 LED voltage indicator circuits

Last Updated on: July 12, 2021 by Apichet Garaipoom
LED voltage indicator circuits

This is four circuits of LED voltage indicator are simple and easy to builds for check voltage battery and others, use as zener,transistor,LM339 and more Read more

Categories Meters & Detectors Tags Level voltage indicator, LED indicator lamps, Zener Diode Regulators 16 Comments

The telephone line status indicator

Last Updated on: August 16, 2022 by Apichet Garaipoom
telephone line status indicator circuit

The telephone line status indicator to prevent the hearing others talk on the phone accidentally and a Protection to making phone calls simultaneously. […] Read more

Categories Meters & Detectors Tags Level voltage indicator, Telephone circuits 5 Comments

Simple LED voltmeter circuit using LM3914

Last Updated on: July 13, 2021 by Apichet Garaipoom
LM3914 LED voltmeter circuit

This is Simple LED voltmeter circuit using LM3914, can measure any volts 1.2V to 1200V on 3 range with 10 LED display easy to look and use 9V battery Read more

Categories Meters & Detectors Tags Level voltage indicator, Volt Meters, LM3914 2 Comments

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