Digitally Controlled Power Supply 0-25 V Part 2 Featured Image

Digitally Controlled Power Supply 2

This is an update to a recent post on a subject of building a Digitally Controlled Power Supply. In part 1 a basic configuration was presented. In this version a numbers of modifications were made to software/hardware to produce a more advanced ...
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 ...

Digital Power Supply 0-14 Volt

Digitally Controlled Power Supply from 0-14 Volt based on PIC16F876A will be demonstrated in this post. This is a modification of Digital Power Supply 2.5-12V article and has similar characteristics. The most noticeable difference is the use of PCF8591P I2C Digital to ...
Arduino-with-74HC595-and-7-Segment-Featured-Image

Arduino with 74HC595 and 7-Segment

74HC595 is a discrete shift register IC that can be easily integrated with Arduino platform. Usually shift registers are used to convert a serial data to a parallel output. Additional shift registers can be connected in series extending the number ...
Thermocouple-Amplifier-MAX31855-with-Arduino-Featured-Image

Thermocouple Amplifier MAX31855 with Arduino

Interfacing a Thermocouple with Arduino platform can be easily done by integrating a MAX31855 to your project. This IC is a Cold-Junction Compensated Analog to Digital Converter amplifier especially design for use with a Thermocouple. The converter provides 14-Bit of ...
Photoresistor-Light-Sensor-Arduino-Featured-Image

Photoresistor Light Sensor Arduino

A simple light sensor can be built using a photoresistor and Arduino UNO board. Similar design is available here. This design requires only a few additional components like 10k resistor and a 10k potentiometer to adjust the light intensity level ...
PCF8591 I2C 8-bit ADC and DAC Featured Image

PCF8591 I2C 8-bit A/D and D/A converter

In this short tutorial we’ll learn how to control PCF8591 I2C 8-bit A/D and D/A converter with PIC microcontroller. PCF8591 was already used in a number of recently published projects like Function Generator, also I’m planning to add it to ...
LCD-Digital-Alarm-Clock-Arduino-Featured-Image

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 ...
Raspberry-Pi-and-74HC595-Shift-Register-Featured-Image

Raspberry Pi and 74HC595 Shift Register

Raspberry Pi I/O capabilities can be expanded by adding one or cascading a number of shift registers. In this design 74HC595 example is shown. 74HC595 is a very popular and relatively cheap IC. There are assembled modules based on this ...
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 ...