USB FM Transmitter

Here's a simple VHF FM transmitter that could be used to play audio files from an MP3 player or computer on a standard VHF FM radio ....

Car LED Light Sequencer Project

This Car LED Light Sequencer can be placed in the automobile dash board. This Car LED Light Sequencer uses a standard 74C164 8 bit shift r...

Electronic Stethoscope

An electronic stethoscope is used to listen to your heartbeat and you would normally use a listening tube or stethoscope. This electronic s...

Mobile phone sniffer – gsm telephone detector

This handy, pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cellphone from a distance of ...

Water Level Indicator with alarm

  This circuit not only indicates the amount of water present in the overhead tank but also gives an alarm when the tank is full. The circu...

Soldering Tips

The following soldering tips will prove useful for any projects that requires soldering. Here I am assuming that you know what soldering i...

Light Dark Sensor With Relay Circuit Using LM741

Above is a schematic diagram of an LM741 light/dark sensor circuit (from the excellent 741 Op-Amp Tutorial by Tony van Roon). The ECG128/...

UPS (Uninterruptible Power Supply)

UPS (Uninterruptible Power Supply), is used to anticipate the power off. Despite UPS Reliable not the original, this series of little means...

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