This circuit for Spy Phone Bug Transmitter Circuit is like small secret listening thing; It can listen and record phone talk which people do not know. Also, this type of device is called a bug or transmitter because it can spy on peoples conversations, so people should not use it for illegal or unethical purposes. […]
Hobby Circuits
Simple Low Battery Indicator Circuit using Two Transistors
This article for Simple Low Battery Indicator Circuit using Two Transistors tell how to make small circuit for battery device. When battery goes low it uses only few parts like two transistors to turn ON one LED light; so this way we can know when to change battery before device stop working. Circuit Diagram: Parts […]
Simple Siren Circuit
To begin with, this Simple Siren Circuit article show how to make circuit sound like real siren! here, the sound goes up and down fast like police car or ambulance siren. Also, building this type of circuit is fun, but remember that people use sirens during emergencies. Circuit Working: Parts List: Components Values Quantity Resistors […]
Booster Circuit for Cable Radio
Anyone having problem getting radio signal from cable? then maybe this post for Booster Circuit for Cable Radio can help which is also called cable radio amplifier. Moreover, this thing make signal strong when going through cable, as cable company give many channels but sometimes signal is not good because of too much distance or […]
Clap Switch Circuit using Speaker as MIC
In this article with one clap we can make a Clap Switch Circuit using Speaker as MIC, which can turn something ON or OFF! Also, we can use normal speaker like microphone which hear the clap sound and then turn switch ON or OFF. Here, only hand sound controls light or toy, as this is […]
Simple FM Radio Receiver Antenna Booster Circuit
Do anyone have a favorite radio station with static sometimes?; then this Simple FM Radio Receiver Antenna Booster Circuit teaches about how to make signal booster for FM antenna on radio. Also, sometimes radio signal are not strong especially if person live far from radio station, so this small circuit makes weak signal stronger and […]