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3 in 1 Circuit Fault Tester Circuit

Last Updated on January 11, 2021 by Admin Leave a Comment

3 in 1 tester circuit compressed

The 3 in 1 tester circuit explained in the following article is actually a combination of signal injector, signal tracer, and logic probe, which allows the user to accurately test […]

Filed Under: Indicators

LED Sound Level Indicator Circuit

Last Updated on January 11, 2021 by Admin Leave a Comment

sound level 1 compressed

The proposed LED sound level meter will detect the sound hitting the MIC, and indicate its volume level through an array of LED, connected as a bar graph. Circuit Description […]

Filed Under: Indicators, Meter and Tester Circuits

Simple Crystal Tester Circuit

Last Updated on December 18, 2020 by Admin 4 Comments

crystal tester

The proposed simple crystal tester circuit can be used for accurately testing the operating frequency of any standard crystal, quickly. The figure below shows a crystal checker circuit schematic. In […]

Filed Under: Indicators

Loudspeaker Power Indicator Circuit

Last Updated on July 1, 2020 by Admin Leave a Comment

fig1 2

This circuit will reveal the height level of an input signal placed on a speaker. It is mainly meant as a fool proof device when linked to an amplifier of […]

Filed Under: Indicators

3 LED Battery Monitor Circuit

Last Updated on May 15, 2020 by Admin Leave a Comment

battery monitor circuit

This battery monitor circuit can be used to monitor the charge level of a battery in 3 different steps, indicated by 3 separate LEDs. Just three LEDs are incorporated to […]

Filed Under: Indicators

LED Voltage Monitor Circuit

Last Updated on May 8, 2020 by Admin Leave a Comment

table

A well balanced power supply is completely necessary for the precise functioning of computers and TTL circuits. A voltage fluctuation of 10% is undoubtedly not bearable, it is therefore advisable […]

Filed Under: Lights and Lamps, Indicators

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