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 …
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 …
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 »
INTRODUCTION Time-keeping is inherently stressful, especially when you can see the seconds ticking down. The Virtual Hourglass Timer takes all the pressure away through its relaxing visual display. Inspired by this digital hourglass alarm clock , the Virtual Hourglass Timer allows the user to set a timer and opts to display the time remaining in an hourglass …
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 …
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 »
Introduction This report covers the design and building of a programmable alarm clock that uses a full spectrum LED to wake you up using your body’s natural response to sunlight. Rather than waking you up with an annoying alarm, a sunrise alarm clock slowly turns on a light in your room over the course of …
I could not find a good name for this project. You could also call it an ‘enough sleep timer’. The idea for this project came up during a vacation in winter. We were in a vacation home where there was no alarm clock in the bed room. I normally need 8 hours of sleep but …
Let’s take a look at the simple beginner’s project of the minute timer. The heart of the project is the 8-bit PIC16F88 MCU. The time is shown on the 7-segment display and the timer is operated using 6 buttons. The device is powered by the 9 volt battery. The time range is from 1 to 99 minutes. …
