Door or Window alarm circuit have been used widely in many homes to detect intrusion. A simple search in internet might fetch you lot of alarms for you to buy. But making your own alarm will be something special and…
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FM transmitters have been used all over the world for communication. The simplicity of building a FM circuit made it so popular among other modulation techniques. Today i have come up with FM transmitter circuit which has a range of about…
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Have you ever built a super cool Hi-Fi Audio amplifier with simple components at your home? If not here is your guide to do so, am pretty sure you are gonna love this. This article narrates about making your DIY high…
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Am back with another oscialltor circuit, sawtooth waveform this time. I have designed a mini sawtooth generator using simple NPN and PNP transistors. The most highlighting feature about this circuit will be its miniature size and easy to use on…
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Spy Bug circuits are something that’s used when we need to listen to conversation without being noticed or to simply put to spy on a person. Generally Spy bug circuits are constructed using a Mic, amplifier and speaker. The medium…
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Code lockers are used for security purposes and it is of many types based on their complexity and level of security they provide. Here we are going to see building of simple code locker circuit using decade counter IC CD4017….
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Amplifiers are very necessary element in any project dealing with signal strength and quality. Similarly Audio amplifiers are used to amplify the strength of speech signals and makes it more audible by amplifying it and put it through a speaker….
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