One may believe that a multimeter are used to test any electrical device, however this may not be always safe with semiconductors. This article explains how to construct a simple harmless tester designed especially for semiconductors. To test several semiconductor types this tester is simple to construct and uses a safe current level. What is […]
Simple Neon Tube Flasher Circuit
Although neon lights are fantastic they often require a lot of electricity to operate. This article explains how to construct a special circuit that enables to turn ON and OFF a neon light using a little battery pack low voltage DC power source. WARNING: Designing high voltage circuits might be dangerous. Do this only under […]
Simple FET Two Lamp Flasher Circuit
Two Field Effect Transistors (FETs) configured similarly to a simple astable multivibrator are used to make the simple two alternate lamp flasher circuit. What is a FET Lamp Flasher Circuit: This electrical circuit which is based on FETs is commonly used to flash lights and bulbs. Along with a few other circuits components it makes […]
Simple Adjustable Oscillator Circuit using Two Transistors
This article teaches how to use just two transistors to create a little sound generator circuit! Turning a knob will change the sounds pitch from high, like a beep, to low like a growl. Either four AA batteries or a tiny wall adaptor can power the circuit. To explore how electronics may generate sound perform […]
Simple Car Fused Tail Lamp Indicator Circuit
The article explained here shows how we can build a simple circuit that can detect the taillights of ones automobile are ON or NOT. It uses a popular circuit component called as a resistor to find out if the lights are getting sufficient power. If a light goes OUT the circuit will signal a alarm […]
Simple Crystal Tester Circuit
Have anyone ever wondered how a quartz watch or radio maintains perfect time? It uses a special part called a crystal oscillator. This post shows how to build a simple tester to see if crystals are working properly. The tester itself is built with common parts like transistors, resistors and capacitors. WARNING: Building circuits with […]