You might think you can just use a multimeter to test all electronics, but that is not always safe for special parts called semiconductors. This article shows you how to build a simple tester specifically for semiconductors that wont damage them. This tester is easy to build and uses a safe amount of current to […]
Transistor Circuits
Simple Neon Tube Flasher Circuit
Neon lights are cool, but they usually need a lot of power to work. This article shows you how to build a special circuit that lets you use a small battery pack low voltage DC power supply to make a neon light flash on and off. WARNING: Building circuits with high voltage can be dangerous. […]
Simple FET Two Lamp Flasher Circuit
The uncomplicated two alternate lamp flasher circuit is constructed utilizing a pair of Field Effect Transistors FETs arranged just like a fundamental astable multivibrator. What is a FET Lamp Flasher Circuit: It is an FET based electronic circuit which can be used to flash bulbs and lamps. It uses a couple of field effect transistors […]
Simple Adjustable Oscillator Circuit using Two Transistors
This post shows you how to build a mini sound generator circuit with just two transistors! You can adjust the sound to be high pitched like a beep or low pitched like a growl by turning a knob. The circuit can be powered by either four AA batteries or a small wall adapter. This is […]
Simple Latch Circuit using Transistors
This article shows you how to build a tiny electronic switch that remembers it is turned on even when you take away the signal. It uses transistors and other basic parts, making it cheap and easy to build. You give it a quick signal to turn on and it stays on until you turn it […]
Simple Set Reset Latch Circuit using Transistors
This post shows you how to build a tiny electronic switch with two settings on or off using transistors. These special switches called SR latches, are used in many electronics to remember things even when you turn the power off and back on. This one uses two common transistors a BC547 and a BC557. What […]