Digitally Controlled Power Supply 2

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

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 design. The most significant improvements are  an increased voltage range and addition of 3×4 keypad to enter … Read more

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 Analog converter instead of digital resistor controlled by PIC microcontroller. In general this configuration allows … Read more

Dual Voltmeter Amperemeter LCD

LCD Digital Dual Voltmeter Amperemeter Featured Image

In this post a simple Digital Dual Voltmeter and Ampere meter design will be shown. It uses PIC16F876A microcontroller and 2×16 LCD display and has 2 input channels for measuring voltage in 0-25v range and current up to 500mA. The task of measuring voltage/current values is very common one and was covered in a number … Read more

Digital Alarm Clock

Digital Alarm Clock Featured Image

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 Digital Timer, clock generation functions were taken from a simpler version of Digital Clock  without … Read more

3 Digit Dot Matrix Display SPI

3 Digit Dot Matrix Display SPI

3 Digit Dot Matrix Display with SPI interface is an advanced version of recently published 7×5 Dot Matrix Character Generator project. This design is more complex as it contains 4 microcontrollers. Three PIC16F88 were used to control 7×5 Dot Matrix Displays, one for each segment. All Slave modules are identical except for their address. Additional PIC/Display … Read more