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Discover the Mystery of 16F84 PIC Frequency Counter

Do you believe with a measly of $7, and you will get a 16F84 PIC frequency counter? Well, in fact a counter would only cost you less than $2, while the LCD display will cost you a little bit more, which about $5 each. Those simple and user friendly features in the 16F84 PIC frequency counter also elaborated the uniqueness of it as well. There are several sophisticated characteristics in this frequency counter, and you might be having the interest on this project even more. Those features are: A very cute stand alone frequency counter. A comprehensive digital readout function, which you can eventually set the IF offset to any of three combinations i.e.: VFO+IF…. VFO-IF or  IF-VFO with the mode switch. Turn the frequency counter into a Gig region; with just a simple modification, (The additions will include the pre-scaler). A typical 14 MHz count will be around this figure: 14.060.45. Note: Make sure you can mount the frequency counter into a 2N2/20. It is always a fun experience to build a simple and reasonably cheap frequency counter. Continue reading

Be Easy with This Frequency Counter

You must wondered, building a frequency counter is a tough task, but is not as hard as you though. Those materials that needed are: LCD 16 character x two lines TCXO 12.8 MHz (1ppm) PIC 16F84 Some of the features for this frequency counter: It can show the frequency in between 100Hz – 2.5GHz and the voltage (0-510mV) on the LCD display. Well furnished with IF offset-function, and can be applied for the frequency display with the homemade transceiver. Small sized circuit board with 10cm x 4.3 cm. Now, you will learn how to deal with the IF OFFSET. Firstly, when you see the RB3=H, RB5=H and RB0=H, this means it is a normal frequency counter with the power turned on. When the SW for RB7 is pushed, the LCD will show “ADJ”. If you twice the tact SW for RCB is pushed, then the LCD shows “OFF” signal. You will notice the RB5 and RB0 set as “H/L”, only after the power is turned off. In the final step, you now can make the display with IF OFFSET! Continue reading