Raspberry Pi 3 Digit LED 7-Segment Countdown Timer
Multiplexing 7-Segment display scheme with Raspberry Pi as described here can be used as a basis for more complex projects. By adding 4x4 keypad matrix and replacing individual 7-Segment displays with a common anode 4 digit 7-Segments module a simple ...
Bargraph Voltmeter
A simple bargraph voltmeter can be built using 2x16 LCD or compatible VFD display. For Arduino version click here. This design utilizes PIC16F877 microcontroller and its ADC block to convert 0 – 5V input voltage to a binary number shown ...
LCD Digital Alarm Clock Arduino
Digital Alarm Clock based on Arduino MEGA board and 2x16 LCD display is the topic of this post. Similar design based on Raspberry Pi can be found at this link. For PIC16F877 version click here. This design should also work ...
3 Digit Up Down Counter PIC16F877A
3 Digit Up Down Counter shown here is based on PIC16F877A microcontroller. The count is shown on the 2x16 LCD display and the direction is controlled by a switch connected to bit 3 of PORTA. With minimal changes the attached ...
Power Supply 2.5 – 12 V
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 ...
8×8 LED Dot Matrix Display with Arduino
In this article I’m going to show you how an 8x8 LED Dot Matrix Display can be driven by MAX7219 with Arduino.There are 2 similar designs. PIC16F876 version is available at this link ,for circuit based on 74HC595 click here.For this project ...
Digital Lock
In this post I'm going to show you how to build a simple Digital Lock using PIC microcontroller. Instead of building a new hardware design from scratch we are going to use PIC Development Board as a basis for Digital ...
4-Digit LED Dot Matrix Clock Arduino
Here is another digital clock design based on Arduino platform. This time it uses 4-Digit LED Dot Matrix module to show the time. Similar design with LCD display is available here. The Dot Matrix module consists of four MAX7219 chips ...
Arduino Thermometer LM35
LM35 is a temperature sensor that outputs a voltage proportional to the surrounding temperature in centigrade. In this post I’ll show how this device can be connected to Arduino MEGA board to build a thermometer that shows the current temperature ...
Arduino Electronic Lock
Here is another Arduino based design and this time I’ll show you how a 4-Digit Code Electronic Lock can be built with Arduino Mega or compatible boards. For similar design based on PIC16F877 click this link. The I/O I’ve used ...
