This article is about is a Simple Transistor Based Touch Switch Circuit. It works when finger touches the pad with no push button used. Human body gives small signal and circuit senses this signal. Two NPN transistors are used and one LED is used as output. Circuit works with only 3V supply which is very […]
Arduino Touch Sensor Relay Circuit
Want to control appliances by touch? then this circuit makes it possible. This Arduino Touch Sensor Relay Circuit uses Arduino and touch sensor. Arduino reads touch signal and relay works like toggle switch. Touch sensor is touched once and relay turns ON. If we touch again then relay turns OFF, each touch changes relay state. […]
Op Amp 741 Sound Generator Circuit
Here is the tutorial for small circuit with big sound. This Op Amp 741 Sound Generator Circuit creates stable tone for hobby projects. The Op amp works like mini sound machine with no complex parts and with no hard wiring. Just connect parts and enjoy instant sound in just few minutes. This circuit is good […]
Audio Sound Generator Circuit using IC 555
Want a simple sound maker? then make noise with this electronic circuit. This small circuit makes loud beep sound from speaker using only one 555 timer. The circuit turns 9V battery into instant audio tone. This Audio Sound Generator Circuit using IC 555 is easy to build and is great for learning. Circuit Working: Parts […]
Fading LED Circuit using Arduino and Potentiometer
This project shows how to control Fading LED Circuit using Arduino and Potentiometer. Potentiometer gives analog voltage. By rotating the potentiometer knob varies the voltage output and arduino reads this variation. Arduino reads it and changes LED brightness and this LED brightness changes smoothly. It is easy to make a simple project for beginners and […]
Simple Up Down Fading LED Circuit
This circuit makes LED glow slowly and then fade slowly which looks like breathing effect. It uses simple parts like only resistor capacitor and transistor and with no microcontroller. This Simple Up Down Fading LED Circuit is good for beginners and easy to build on breadboard. This type of circuit can be used in shopping […]