Frequency counter 400Hz to 50MHz with PIC 16F84


Posted on Oct 28, 2012

It consists only from Microchip PIC 16F84 cpu and LCD text module. Author states that this counter is capable metering frequencies from 400Hz to 50MHz. I used faster, 20MHz version of 16F84A-20I/P, and it managed to count 80MHz oscillator output.



Frequency counter 400Hz to 50MHz with PIC 16F84 - image 1
Click here to download the full size of the above Image.

It is made on testing breadboard and uncalibrated. I made it just for testing. And the schematics is almost unmodified. I used small TTL oscilators for testing. These devices are much more precise that cheap quartz crystal used in schematics. It is possible to adjust 10MHz and so you can calibrate your counter. Here is my testing readings- the device is uncalibrated. Quartz Freq readings 12.000000 MHz 12000112 Hz 25.175000 MHz 25175456 Hz 28.322000 MHz 28322656 Hz 80.000 MHz 79999616 Hz




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

PC DATA LOGGER
Beeper driver with 555
Fet Microphone Mixer Circuit
Hampton Bay Air Conditioner IR Remote Control Reverse Engineer
h bridge with pwm
powering circuit using serial port
Triple Stroboscope Circuit
H-Bridge
Novel FM receiver circuit diagram
Low power timer switch



Top