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. This type device is called bug or transmitter. It spy on people who talk, so using it is not a good idea. Also in some country this circuit maybe […]
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
This Simple Siren Circuit article show how to make circuit sound like real siren! Sound goes up and down fast like police car or ambulance siren. Making this type of circuit is fun but remember siren are also used when emergency happens. Circuit Working: Parts List: Category Description Quantity Resistors 47k 1/4 watt 2 Capacitors […]
Booster Circuit for Cable Radio
Anyone having problem getting radio signal from cable? Maybe this post for Booster Circuit for Cable Radio can help which is also called cable radio amplifier. This thing make signal strong when going through cable. Cable company give many channels but sometimes signal is not good because of too much distance or interference. Because of […]
Clap Switch Circuit using Speaker as MIC
In this article with one clap we can make a Clap Switch Circuit using Speaker as MIC. It can turn something ON or OFF! We use normal speaker like microphone which hear the clap sound and then turn switch ON or OFF. Only hand sound controls light or toy. This is fun and interesting project […]
Simple FM Radio Receiver Antenna Booster Circuit
Do anyone have a favorite radio station with static sometimes? This Simple FM Radio Receiver Antenna Booster Circuit talks about how to make signal booster for FM antenna on radio. Sometimes radio signal are not strong especially if person live far from radio station. This small circuit makes weak signal stronger so radio can catch […]