LCD Frequency Counter PCB project

Showing my first version of the PCB (LCD module attaches to the other side).

Using it to display the frequency of my signal generator. (Click photos to enlarge)

Introduction

I recently picked-up an old Heathkit Sine/Square wave audio signal generator at a car-boot sale.
It is a very nice three valve design, and still works, apart from being a bit out of calibration.
I already had some LCD display modules and several old PIC16F84 microcontrollers, and decided to make a small frequency display to always be used with this signal generator.

A quick web search found the ideal solution - The Weeder Frequency Counter PIC 16F84 port by Peter Cousens, as published on the PIClist:
Frequency Counter,PIC 16F84,Weeder Technologies

Reading through the various links, I found an updated version of the software:
The Weeder Frequency Counter as expanded by Barry Smith for 16F628, 4 Bit LCD, USART output

I decided to make a single-sided pcb for that software version as it uses 4 bit LCD mode, keeping the circuit simpler and not bother with any pre-amp transistors.

Circuit and PCB Layout

Frequency counter pcb layout and circuit diagram: (PDF file)

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More projects to be added later...

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Disclaimer

These projects (including any software) are provided on an "AS-IS" basis for NON-COMMERCIAL, personal use only and WITHOUT WARRANTY of any kind, either express or implied.
I shall NOT BE LIABLE in any way to you or to any other person, firm or corporation whatsoever for any loss, liability, damage (whether direct or consequential), personal injury or expense of any nature whatsoever arising from inaccuracies, errors in, or the use or inability to use the hardware and/or software here.


This project page was last updated Wednesday 2nd of September 2009