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Flashing Headlight for Mobikes

The dipper for a vehicle’s headlight changes the light from high beam to low beam or vice versa given a particular set of road...

Electrolytic Capacitor Tester

Using this electrolytic capacitor tester you can detect leaky and dead (open) electrolytic capacitors. It operates based on the time constant (T) of the...

Auto Snooze for Digital Alarm Clocks

Alarm clocks are made to wake you up. However, it is quite bothersome to hear the alarm continuously until you get up and put...

Mobile Phone Multipower Unit

Most of the mobile phone complaints are related to the power supply. This is mainly because of improper charging and use of non-recommended chargers...

Alarm using your own Voice

This alarm plays your prerecorded voice message. It is built around the readily available quartz clock. Take the buzzer out of the quartz clock...

Resistance Measurement Using Sample and Hold Method

A sample and hold circuit, as the name implies, samples an analogue input signal and holds its value until the input is again sampled. Fig....

Doorbell with Security Feature

This doorbell system works such that when someone presses your calling bell switch during the night, not only the bell rings but the bulb...

Infrared Remote Control Timer

The circuit comprises two sections, namely, the transmitter section and the receiver section. Fig. 1 shows the IR transmitter section. The astable multivibrator NE555...

Low-Range AM Radio Transmitter

Here is a simple radio transmitter for transmission up to 25 metres. It is basically an AM modulator whose signal can be received on...

Automatic Water Pump Motor Controller

Municipal corporations in many cities supply water during early morning hours. So, you have to wake up early, just to switch on your motor...

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