PWM Fan Controller
Pulse Width Modulation (PWM) is very common technique for controlling cooling fan speed in Desktop PC. In this project PIC16F877A based Pulse Width Modulation controller was built and tested with 2 fans. 80 mm Coolink SWiF2-80P PWM Fan and Arctic Cooling ...
Arduino 7-Segment LED Display MAX7219
MAX7219 is a serial input/output common-cathode display driver. It can interface the microcontroller to 7-segment numeric LED displays, bar-graph displays, dot matrix display or individual LEDs. This IC has some very useful features like built in decoder, multiplex scan circuitry, ...
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 ...
Using Ultrasonic Sensor HC-SR04 with PIC16F877
This post is about building a basic distance meter with ultrasonic HC-SR04 sensor and PIC micro controller. For Arduino version click here. Raspberry Pi variant is also available at this link The interface is very simple and does not require too many commands ...
LCD voltmeter based on ADS1015 with Raspberry Pi
LCD voltmeter with Raspberry Pi and ADS1015 is the topic of this project. Similar design for Arduino platform is available at this link. ADS1015 is a 12 bit ADC chip with 4 analog input channels. The interface with Raspberry Pi ...
10Bit 7-Segment Digital Voltmeter 0-24V
This is an upgrade to recently published Simple Digital Voltmeter.Few improvements were done to hardware and software.DVM operating range was slightly increased up to 24 V Max, however the most significant change is that the code now uses full 10 bit of ...
1Hz Clock Generator using PIC16F876
In this article we’ll see how to generate 1 Hz clock with PIC16F876/877 PIC microcontrollers. 3 different approaches will be demonstrated. The most basic solution is to use nested loops to “waste” enough instruction cycle time in order to produce ...
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 ...
128×64 LCD Display
A few weeks ago I’ve uploaded post with relatively simple assembly code example for interfacing 2x16 LCD display with PIC16F microcontrollers. Driving Graphic LCD display is more complex task as it lacks the build in character generation unit so each pixel needs to ...
Basic counter with RGB LED 2812 Pixel Matrix Shield
In this post I’ll show how to interface a Keyestudio 40 RGB LED 2812 Pixel Matrix Shield with Arduino UNO compatible board. Each LED on this shield has an integrated chip WS2812 and can be individually controlled. Attached Arduino code ...
