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
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
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 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
Digital Timer can be built by using PIC16F876A micro-controller and a few additional components. The schematic is similar to Fan Speed Monitor Design. 3×4 Keypad and 5V Relay were added as you can see from figure below. Only three 7-Segments are used. The code for this design was also slightly modified. It still uses the … Read more