Mechatrofice Blog

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Touch switch project

Touch switch circuit using transistor A touch switch operates with a touch action of an object. The given touch switch circuit works with an arrangement of two NPN transistors, which can obtain a high current gain...

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Audio Tone generator circuit

A tone generator circuit can be used for various applications such as alarms, bells, indicators, etc. A tone generator consists of a square, triangle, saw tooth periodic wave generator circuits, commonly square wave generators. Such periodic...

what is shift keying modulation ? 0

what is shift keying modulation ?

Amplitude shift keying (ASK modulation) Amplitude shift keying is a modulation technique in digital communication. It is a form of amplitude modulation that represents the digital data in discrete amplitude levels. For a binary...

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How to make a Continuity tester circuit

A continuity tester is a device used to determine the existence of an electrical connection between two points. It consists of two testing probes which will be connected to end contacts in the circuit....

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Automatic Light Control Circuit diagram using LDR

These circuits can be used for different automatic light sensing projects including automatic night lamp, automatic street light controller, dark sensor circuits, etc. Automatic night lamp circuit using IC 555 An automatic night light circuit...

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Rectifier circuit : Half wave and Full wave

How to convert AC to DC? A Direct current flows only in one direction, which means it has a constant polarity across its terminals. Where an Alternating current periodically changes its direction of the current, that...

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Why fuse wires are always thin? if it is thick?

Fuse is a sacrificial electrical safety device used for overcurrent protection. It will isolate the circuit from the source when the current flow exceeds its limit. As the Fuse is not just an electrical contact, it...

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Alternating led flasher circuit

This alternate LED flasher consists of a pair of LEDs which blink alternately. It has the same circuit of a simple LED flasher circuit using a 555 astable multivibrator. The only difference is that...

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Police flasher light circuit diagram

Strobe lights are commonly used as emergency vehicle lights for visual warnings. Their light effects are similar to the flashing light in police vehicles, ambulance, beacon light bars, etc. The given strobe light circuit...

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Flashing LED brake light circuit

Simple flashing brake light The circuit can use to make a simple pulsating stop brake light which continuously flashes as long as the brake is applied. Here we are using a 555 astable multivibrator...