LCD Voltmeter based on Arduino
This post is about building a simple 0-5V 3 digit voltmeter using Arduino UNO compatible board and 4x20 LCD display. This design should also work on all similar boards, I’ve tested it on Arduino Mega and UNO boards. No additional ...
Running LED with PIC16F877A
In this post I'll show a simple running LED circuit. Currently only 2 patterns are available but additional effects can be easily added by slightly modifying the code. This design uses only 16 LED's however PIC16F877 has 5 I/O ports ...
Arduino 4 Digit LED 7-Segment Countdown Timer
Arduino 4 Digit LED 7-Segment Countdown Timer based on Arduino MEGA will be shown in this post. For LCD version of this design follow this link. Similar project that uses PIC16F876 MCU can be found at this link. Raspberry Pi ...
LED Aquarium Lighting
Recently I was asked to build an aquarium lighting controller prototype to provide variable brightness during its operation and ability to program ON/OFF times. 25 blue and white diffused 10mm LED were used to illuminate the aquarium. The main requirement from ...
Raspberry Pi and 74HC595 Shift Register
Raspberry Pi I/O capabilities can be expanded by adding one or cascading a number of shift registers. In this design 74HC595 example is shown. 74HC595 is a very popular and relatively cheap IC. There are assembled modules based on this ...
Digital Stopwatch
In this article I’ll demonstrate a digital stopwatch design based on PIC16F876A micro controller.For related circuit based on Arduino click here. Similar project showing a Digital Timer design can be found here. Current circuit can be used to count in ...
AD9850 PIC16F Interface
A simple wave generator should be a part of every electronics enthusiast toolset. Basic Sine/Square output in reasonable frequency range will be sufficient for general use. Luckily such generators are available in form of a very popular AD9850 module. Search ...
PCF8591 I2C 8-bit A/D and D/A converter
In this short tutorial we’ll learn how to control PCF8591 I2C 8-bit A/D and D/A converter with PIC microcontroller. PCF8591 was already used in a number of recently published projects like Function Generator, also I’m planning to add it to ...
3 Digit Dot Matrix Display SPI
3 Digit Dot Matrix Display with SPI interface is an advanced version of recently published 7x5 Dot Matrix Character Generator project. This design is more complex as it contains 4 microcontrollers. Three PIC16F88 were used to control 7x5 Dot Matrix Displays, ...
Arduino LCD Bargraph Voltmeter
Arduino based LCD Bargraph Voltmeter can be easily assembled with Arduino Mega 2560/Arduino Uno or compatible boards. Arduino LED battery level indicator is here. Similar design based on Raspberry Pi platform is available at this link. This design is basically ...
