An oscillator is like a special electronic circuit. It makes electrical ups and downs, like waves on an ocean. These waves can be smooth and curvy or choppy. The circuit can control how fast frequency ups and downs happen. There are many kinds of oscillator circuits. One type called an RC oscillator uses a special […]
Transistor Circuits
Adjustable Voltage, Current Power Supply Circuit Using Transistor 2N3055
This post shows you how to build a powerful adjustable power supply circuit. This circuit lets you change both the voltage and amperage it provides, making it super versatile for many electronics projects. It uses a common transistor 2N3055 and other basic parts. Building circuits with high voltage can be dangerous. Only do this with […]
220V Over Under Voltage Cut Off Circuit Using Transistors
You might be surprised to learn that an effective circuit for the mentioned protections can be constructed using just a pair of transistors and a few other passive components. What is a 220V Over Under Voltage Cut Off Circuit: A 220V over under voltage cutoff circuit is a protective electronic circuit designed to monitor the […]
Simple 220V Inverter Circuit using 2N3055 Transistors
This article shows you how to build a powerful inverter circuit that can turn a 12V battery like a car battery into household electricity 220V. It is easy to build, uses few parts, and is very efficient according to the author. There should be safety regulations regarding using homemade inverters so be sure to check […]
Simple Audio Mixer Circuit using a Single Transistor
This post shows you how to build a simple circuit that mixes two sounds together. This is like a mini DJ mixer, but it only uses one transistor a tiny switch to combine two different sounds into one. This is a great project to learn about how electronics can mix sounds together. Circuit Working: Parts […]
Simple Lie Detector Circuit
Have fun building this lie detector circuit! While it wont be perfect real lie detectors are much more complex, it can be a fun way to learn about how our bodies react to stress. This circuit uses changes in sweat to see if someone telling the truth people sweat more when they are stressed or […]