This article for Simple Logic Probe Circuit using Transistors tell how to make one useful tool called voltage tester. It uses two transistors for checking if some place in circuit have positive voltage. When it find electricity it makes beep sound and small light turns ON. People who want to learn electronics, this tool will […]
Transistor Circuits
9V to 300V Converter Circuit
This smart design for 9V to 300V Converter Circuit changes a small 9V battery power into big 300V power. It uses only one transistor and is very simple and easy for one to try. This circuit is good for learning and for small projects. What is a 9V to 300V Converter: A circuit called as […]
Bass Treble Tone Control Circuit using a Single Transistor
This Bass Treble Tone Control Circuit using a Single Transistor BC547. It is an easy tone control circuit. We can turn bass up or down and treble also in audio sound. What is Bass Treble Tone Control Circuit: This Bass Treble Tone Control Circuit make treble go high by cutting sound below 500 Hz. When […]
Tester Probe Circuit
Many people think multimeter can test any electric part. But this not always safe especially for semiconductor. This article for Tester Probe Circuit show how to make one easy and safe tester only for semiconductor. This tester is easy to build and uses small current which is good to test many type of semiconductor. What […]
Neon Tube Flasher Circuit
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. Do this only when adult are watching. What is a […]
Simple FET Two Lamp Flasher Circuit
Simple FET Two Lamp Flasher Circuit connect same like simple astable multivibrator. They make easy circuit for two lamps flashing one after other. What is a FET Lamp Flasher Circuit: This circuit using FETs mostly used for flashing lights or bulbs. It also uses some other parts but mainly has few field effect transistors. Circuit […]