Digital timer switches are used to control the operation of electrical devices based on a programmed schedule. This project describes a programmable digital timer based on a PIC16F628A microcontroller that can be programmed to schedule the on and off operation of an electrical appliance. The appliance is controlled through a relay switch. This timer switch […]
Programmable digital timer switch using a PIC16F628A Read More »
This is an alarm clock I built. It was very effective during the sort time I used it, because I programmed it to play a very annoying tune through a speaker. I actually started to wake up before the alarm went of, so other people in the house didn’t wake up from the annoying pitches
Digital alarm clock using PIC16F877 microcontroller Read More »
Description The PIC 12F629 and 12F675 come equipped with an internal 4MHz oscillator, eliminating the need for an external crystal or RC network. This feature not only frees up one or two pins for I/O purposes but also facilitates integration into designs with minimal component counts. The internal oscillator needs to be calibrated and this
Internal Oscillator Recalibration Utility for PIC12F629 Read More »
Background It is time to update the frequency counter again. A frequency counter is one of the most important measuring tool we need as homebrewers of RF electronic. This frequency counter has very high performance and still is very easy to build and to use. Anyone can build it and have fun. The counter is
2.5 GHz Frequency counter using PIC16F870 Read More »
Caption (copied from the NorCal meeting listed in the links below): IK3OIL Frequency counter built by Wayne McFee. This is from IK3OIL’s web site, and the cost of the counter was about $2, minus the display, which was about $7. Wayne got the source was www.shopeio.com. They are located in Gardenia, California. Design and Code
IK3OIL 16F84 PIC Frequency Counter Files Read More »
2. Counter The whole counter design is based on the PIC micro-controller 16F876A. The latter includes several peripherals and just a few of them are used in this project. The most important in this project are two internal, hardware counters/timers called TMR0 and TMR1. The TMR0 timer generates very precise interrupts every 100 microseconds (10kHz)
Simple RF/Microwave Frequency Counter using PIC16F876A Read More »
It’s a kitchen timer. Use it to time spaghetti, or maybe an egg. It uses two PICs, one acts as a keyboard encoder, the other drives the display and supports the timer functions. You key in the desired time and press ‘#’. It’s accurate to 1/100th of a second, which can make all the difference
Countdown Timer using PIC16F84 microcontroller Read More »
This LED clock may not be the easiest to build but surely it is the one with fewer parts that you can find, for that reason I call it “The ANP LED Clock”. (ANP stands for Almost No Parts.) Using the micro controller PIC 16F84A or the 16F628 (same pinout), this clock have more and
A 12hr/24hr LED Clock with display control using PIC16F628A microcontroller Read More »
LED Binary Clock This is the second revision of my PIC based LED binary clock. The original version was the first PIC project I attempted, it used a PIC16F84A to do both the timekeeping and control the display matrix, unfortunately it didn’t keep good enough time and gained about a minute every week. This second
LED Binary Clock using PIC16F628A microcontroller Read More »
Where I live, the cold months seem to go on forever so I have to find some way to exercise that keeps me indoors. I could afford to go to a gym but it takes too much time, I’d have to show off my old body in public, and I wouldn’t be able to watch
High Intensity Interval Training (HIIT) Timer Read More »
