In this post I’d like to share a design of PWM Fan controller based on PIC16F684 MCU. For Arduino version click here. Previously I’ve designed similar circuits some of them more complex than this one. I recommend you to look ...

In this post I'll show how you can drive 7 Segment LED display with PIC16F876A. Instead of using a dedicated IC’s like 4511 we’ll program the micro controller to convert  BCD input code 0 – 9 to a 7 Segment LED ...

Arduino hexadecimal to binary Base Converter is a simple design that can be built using 4×4 Keypad and I2C LCD display module. Arduino MEGA board was chosen as a target device. This circuit will wait for a single digit to ...

In this post I’ll show how to build a basic kinetic watch winder using PIC microcontroller and stepper motor. Kinetic watches do not require changing the battery as frequently as in quartz watch however despite their many advantages they have ...

Power Supply is probably the most common electronics project you can build.This is a basic design for digital power supply. It was built around 3 main components. Digital potentiometer – MCP4251-502E/P, Low  Dropout Voltage Regulator – MIC29152 and PIC16F877A.The idea ...

8x8 LED Matrix chaser based on Arduino MEGA compatible board will be presented in this post. It uses a LED dot matrix display module with two 74HC595 shift register chips connected in serial to control the LED output. Similar design ...

Raspberry Pi based LED bar graph display is a relatively simple circuit. It can be easily built using commonly available components. For Arduino version click here. 8 LEDs, 1k potentiometer, ADS1015 ADC module and Raspberry Pi board is all you ...

The topic of this post is building sine wave generator based on Arduino UNO and PCF8591 8-bit A/D and D/A converter. For similar design with PIC micro-controller look at this link. Raspberry Pi version based on MCP4725 DAC available at ...

If you ever thought how fast you can react to external stimulus here is the circuit that can measure your response time. It measures the time it takes for you to press the push button in response to  turning the ...

Here is a Basic PIC Frequency Counter design. For Arduino version click here. It doesn't not attempt to compete with some advance designs and has a very limited frequency range, however it can be used as a starting point to ...