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FC1-Rev1011 Frequency
Counter: (Obsolete)
This Frequency counter Project is based on
PIC16F628/A Microprocessor chip manufactured by Microchip.
Almost similar to previous FC1 project except that
1. Project
uses PIC16F628/A chip
2. Place
for a 9V battery
3. RS232
output for PC connectivity.
4. Supplied
with a Powder Coated metal cases.
In this counter, we have possibility to supply
external 12V or have an Internal 9V battery, selected from front panel
switches.
Counter firmware is Auto-Ranging and drives a
16x1 LCD. Counter is designed on 8 X 14cm PTH Double Sided PCB. I
could make this board much smaller but I preferred this size, keeping
in mind the available cases made for other projects!!
Measured frequency is also
available at RS232 level at D9F connector on board. This may be read
by running simple win Hyper Terminal. No special Windows program is
available and this is left up to the user to decide what and how data
may be used on PC.
A small update from previous
design is that, we can power front-end RF amp from three possible
sources:
- From
9V (may change with battery getting discharged)
- +5V
and (steady)
- 9V
from MAX232 chip. (Steady but loading on MAX232)
No attempt is made to include a
Prescaler as objective of this project is to use PIC at its maximum
possible capabilities and limit its use to PIC’s Frequency
measurement limits. Although FC1 Rev1011 is states as a 35MHZ counter,
it may work to as high as 50MHZ on some PIC chips.
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