Neon light look very nice but it needs much electricity to work; this Neon Tube Flasher Circuit show how to make special circuit to turn ON and OFF neon light using small battery with low voltage DC. WARNING: Making high voltage circuit can be dangerous, so do this only when adults are watching. What is […]
Oscillator Circuits
Simple Adjustable Oscillator Circuit using Two Transistors
To begin with, this article for Simple Adjustable Oscillator Circuit using Two Transistors show how to make small sound circuit using only two transistors! Hence, when we turn the knob the sound goes high like beep or low like growl, also we can use four AA battery or small wall power to run this circuit. […]
Crystal Tester Circuit
Did anyone ever think how quartz watch or radio keep time so good? the answer is it uses one special thing called crystal oscillator. Also, this post for Crystal Tester Circuit show how to make small tester to check if crystal is working or not. Tester are made with simple parts like transistor, resistor and […]