L293D is small chip which control speed and direction of DC and stepper motors. People use it a lot in robots and automation. It uses H-bridge system to change motor direction by flipping voltage. Chip can run 2 motors at same time. Each motor get up to 600 mA current which is good for small […]
Designing a Simple 7W LED Bulb Circuit
LED lights last long and use less power so more people like them now. This article for Designing a Simple 7W LED Bulb Circuit shows how to make and use a 7W LED bulb circuit. Parts needed for this circuit are 230V AC power, MOV, capacitors, resistors, bridge rectifiers, Zener diodes. Be careful! This circuit […]
Simple Adjustable Brightness Control Circuit for LEDs
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 […]