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:: Home » Meters & Detectors » Page 9

Meters & Detectors

Simple SCR tester circuit diagram

Last Updated on: July 13, 2021 by Apichet Garaipoom
Perfect SCR tester circuit

Simple SCR tester circuit diagram is very useful. We can know location pin on gate lead, anode lead and cathode lead. can also test diode, LED and Triac Read more

Categories Meters & Detectors Tags Electronic Test equipments Leave a comment

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 6 Comments

Simple metal detector circuit

Last Updated on: June 16, 2022 by Apichet Garaipoom
capacitors virtual which caused from parallel of metal

This is a simple metal detector circuit, Can find various metal and adjustable sensitivity Easy to use near metal. use IC-NE556-Monostable multivibrator Read more

Categories Meters & Detectors Tags NE556 10 Comments

Adding Capacitance Meter Range for Digital Multimeter

Last Updated on: July 13, 2021 by Apichet Garaipoom
Add to capacitance measurement Range for digital Multimeter

This circuit is built to add capacitance meter range range for a general digital multimeter which is small,cheap and most popular. […] Read more

Categories Meters & Detectors Tags Capacitance measurement, Digital Meter Circuit Diagram 1 Comment

1.5V Battery Tester Circuit

Last Updated on: April 1, 2025 by Apichet Garaipoom

This 1.5V battery tester circuit uses the LM324 to measure 1.5V / 1.2V AA or AAA batteries. The batteries’ charge is displayed using 8 LEDs. Read more

Categories Meters & Detectors Tags Battery Testers, LM324 1 Comment
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