The construction of a useful instrument known as a voltage tester is explained in this article. It can detect whether there is a positive voltage at a specific point in an electronic circuit by using two transistors. When it detects electricity it beeps and illuminates with indication sign. Anyone interested in learning about electronics will […]
Transistor Circuits
Simple 9V to 300V Converter Circuit using a Single Transistor
This creative design converts a regular batteries low 9V DC output into a powerful 300V DC supply. What is a 9V to 300V Converter: An electrical circuit known as a 9V to 300V converter is made to change a 9V low voltage input into a 300V high output voltage. Under the broader category of DC-to-DC […]
Bass Treble Tone Control Circuit using a Single Transistor
This circuit is an easy one transistor bass and treble control circuit using a BC547 transistor. It is a simple tone control circuit that allows one to adjust the bass and treble levels in an audio signal. What is Bass Treble Tone Control Circuit: It is an electrical circuit where the maximum treble setting shapes […]
Simple Tester Probe Circuit
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 you 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 […]
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 […]