Function Generator Featured Image

Function Generator

Have you ever wondered how to generate a sine wave using PIC microcontroller. In this post I’ll show you a simple circuit design that can generate arbitrary wave forms including sine by using MCU and PCF8591 D/A converter. For similar design ...
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I2C Serial LCD Interface Module Arduino

In this post I’m going to show you how to use a Serial I2C Interface Module to control 2x16 LCD display with Arduino. For similar design using PIC16F876 click this link. Instead of using 8 or 4 bit parallel connection ...
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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 ...
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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 ...
Making a siren using Arduino Featured Image

Making a siren using Arduino

Generating sound patterns with Arduino is a topic of this article. All you need is Arduino compatible board a simple DC buzzer and current limiting resistor. In this project I'll show how to build a police siren using Arduino Mega ...
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Arduino with DS3231 Real Time Clock

In this post I’ll show you how to interface a RTC module DS3231 Real Time Clock  with Arduino. This particular module uses I2C protocol to transfer current time to a micro controller. DS3231 library and header files should be installed ...
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Digital Alarm Clock

Digital Alarm Clock design based on PIC16F876A will be demonstrated in this post. Various modules from earlier project were implemented in  current design hardware and source code. For example it uses the same 7-Segment Display and multiplexing routing as in ...
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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 ...
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LM75A Digital Temperature Sensor Arduino

LM75A is a digital temperature sensor with built in analog to digital converter and I2C interface .It can provide an accurate temperature reading from -55 to +125 C. For similar design based on analog LM35 sensor click here. Also a ...
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Stepper Motor Controller with Arduino

Basic Stepper Motor Controller can be built with Arduino board and a few additional components like MOSFET switches and a potentiometer to control unipolar stepper motor speed and direction. The principle of operation is relatively simple. When a potentiometer is ...