Digital Timer Featured Image

Digital Timer

Digital Timer can be built by using PIC16F876A micro-controller and a few additional components. The schematic is similar to Fan Speed Monitor Design. 3x4 Keypad and 5V Relay were added as you can see from figure below. Only three 7-Segments ...
LED-Battery-Level-Indicator-Featured-Image-Arduino

LED Battery Level Indicator Arduino

LED Battery Level Indicator can be built using Arduino UNO board and 10 LEDs. Similar design that uses 2x16 LCD display can be found at this link. RGB LED variant is here. For Raspberry Pi version click here. I/O lines ...
AD9850 8-Bit Parallel Load DataControl Main

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 ...
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 ...
Raspberry-Pi-3-Digit-LED-7-Segment-Countdown-Timer-Featured-Image

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 ...
Temperature Controlled Fan Featured Image

Temperature Controlled Fan

Here is another fan controller design based on PIC microcontroller, this time it's temperature controlled and can be used to monitor Hard Drive temperature and adjust the fan speed accordingly or as a case fan controller. This post following recently ...
8x8-LED-Dot-Matrix-Display-with-Arduino-Featured-Image

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 ...
LM35-Temperature-Sensor-with-Raspberry-Pi-Featured-Image

LM35 Temperature Sensor with Raspberry Pi

Using LM35 temperature sensor with Raspberry Pi is a relatively simple task once you have a way to read and convert analog signals. Fortunately in my previous project I’ve shown how to build a basic Raspberry Pi voltmeter with ADS1015 ...
LCD-voltmeter-based-on-ADS1015-with-Raspberry-Pi-Featured-Image

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 ...
1Hz Clock Generator Featured Image PIC16F876A

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 ...