Multiplexing 7-Segment Display with Raspberry Pi
When working with multiple 7-Segment displays a multiplexing scheme is required in order to simplify the design and save Raspberry Pi I/O pins. Such implementations shown in this design. As can be seen from a schematic diagram 2 7-Segment displays ...
Basic Arduino Frequency Counter
Basic frequency counter capable of measuring 0-5V square wave up to 100kHz can be built using just 2 components: Arduino MEGA board and 2x16 LCD display. For PIC16F876 version click here. Frequency counter code is also very simple. It uses ...
Solar Power Mobile Charger
Solar power mobile charger can be built by tweaking digital power supply schematic. The Software/Hardware stayed almost the same as the original circuit.Current design has the same overcurrent protection and output voltage can be changed by pressing SW1. Voltage and Current ...
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 ...
7-Segment LED Display with I2C
In this post we’ll add a serial data transfer capability to a standard 7-Segment LED Display by using PCF8574 I/O Port expander IC with I2C interface.For similar design based on Arduino see this link. Usually in order to minimize required ...
7×5 Dot Matrix Character Generator
In this post a basic character generator design based on PIC16F88 will be demonstrated. 7x5 Dot Matrix Display was used and its pin out is shown in the schematic below. Instead of using PIC16F876/7 microcontrollers PIC16F88 was chosen for this purpose ...
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 ...
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 ...
Humidity and Temperature Sensor DHT11 with Arduino
Interfacing Humidity and Temperature Sensor DHT11 with Arduino platform is the topic of this post. I’ve published a number of designs with various temperature sensor, both digital and analog. Here you can see how to use LM75A digital sensor with ...
Interfacing MCP4725 DAC with Arduino
In this post I’ll show you how a 12 bit DAC model MCP4725 can be connected and controlled by Arduino or a compatible board. Similar design based on Raspberry Pi platform can be found at this link . Wire.h and ...
