LEDs (light-emitting diodes) are used in many things. They are strong, work well and can be used in different ways. In things like decoration or signals, changing LED brightness is important. This Simple Adjustable Brightness Control Circuit for LEDs uses BC547 NPN transistor, resistors, one preset (variable resistor) and a white LED to change brightness. […]
Building a Simple Pulse Frequency Counter Circuit with Arduino
Pulse frequency counter count signal in hertz (Hz). It is an important tool in electronics. Now Arduino and other microcontroller make counter easy and cheap. This article for Simple Pulse Frequency Counter Circuit with Arduino show how to make this easy circuit with few parts. We have used IC 555 to make pulse, IC 7809 […]
Simple Arduino-Powered Running LED Circle Circuit
Making nice looking projects help learning and fun in electronics. Simple Arduino-Powered Running LED Circle Circuit is one easy project. It uses Arduino to control LEDs in a circle. This project is simple and it teaches coding, circuit making and LED control. A 10k pot changes LED speed makes it fun to use. Code: Code […]
Simple Triangle Wave Generator Circuit using IC LM358
In this this article we will learn how the triangle wave goes up, down, then up again and then repeats the same. It is special wave made from small waves called harmonics. It shape look like triangle because small waves match like bricks. Harmonics in triangle wave get weak fast and is not strong like […]
Simple DIY Guide to a USB Desktop Lamp Circuit
Making USB lamp by ourselves is an fun hobby. We learn electronics by using hands and be creative. This circuit is good project for beginner or anyone who want to learn circuit. This Simple DIY Guide to a USB Desktop Lamp Circuit is a useful project to learn basic about electronic. USB lamp uses power […]
Hysteresis in Schmitt Trigger Circuit using IC 555
Schmitt Trigger is special type comparator. It gives stable switching even if input signal is noisy or slow. We can use 555 timer IC as Schmitt Trigger. This IC is used in many projects. Schmitt Trigger can give two types of output : normal (non-inverting) and inverted square wave. Next we will learn how to […]