Using Ultrasonic Sensor HC-SR04 with PIC16F877 Featured Image

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 ...
PIC Fan Speed Monitor Featured Image

Fan Speed Monitor

Fan Speed Monitor is another simple design based on PIC16F876A microcontroller. Two similar posts about ways of controlling and monitoring fan speed were recently published. PWM Fan Controller and 2 Channel PC Fan Controller. Current article however implements a different ...
Arduino-Electronic-Lock-Featured-Image

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 ...
Basic PIC Frequency Counter Featured Image

Basic PIC Frequency Counter

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 ...
10 Bit 7-Segment Digital Voltmeter Featured Image

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 ...
Arduino-4-Digit-LED-7-Segment-Countdown-Timer-Featured-Image

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 ...
7-Segment-LED-Display-PCF8574-I2C-Arduino-Featured-Image

7-Segment LED Display PCF8574 I2C Arduino

Adding a serial data transfer capability to a 7-Segment LED Display can be done by using PCF8574 I/O Port expander with I2C interface. Arduino UNO controls the PCF8574 by sending display codes for each segment. Similar circuit based on PIC16F876 ...
Interfacing VFD Display Featured Image

Interfacing VFD with PIC Microcontroller

Vacuum fluorescent display can be a good alternative to a Liquid-crystal displays in some applications. They have a number of advantages over LCD like extended temperature range and excellent contrast in high brightness environment. The main disadvantage is higher power consumption ...
HC-SR04-Ultrasonic-Sensor-with-Raspberry-Pi-Featured-Image

HC-SR04 Ultrasonic Sensor with Raspberry Pi

Using HC-SR04 Ultrasonic Sensor with Raspberry Pi is a relatively easy task. HC-SR04 is a very popular module that can provide the distance to the object by sending ultrasonic bursts at 40kHz and measuring the time it takes for the ...
PIC Development Board Featured Image

PIC16F Development Board

In this post I'll show a more general approach for circuits prototyping. Instead of building each individual design to validate its operation why not to design a basic PIC16F877A based Development Board. Current design have all the necessary features of ...