In article , "Dale Parfitt"
writes:

So I just built a PIC 16f84 based 4 LED digit counter. In less than a week
I built the programmer, learnt to use the MPASM, breadboarded the demo
circuit and found a lot of PIC based counter projects. I'm learning to code
slowly but at least there are only 35 instructions.

The LED's take up to 10mA per digit.

I found most popular LCD modules have a standard Hitachi HD44780 interface

I am very interested in your design- do you have it documented anywhere?

Thanks,

Dale W4OP

Here are some links to related projects involving PIC micros:

http://lea.hamradio.si/~s57nan/ham_radio/fmtr.html

http://www.qsl.net/om3cph/counter/ld...s/pic_flck.htm
- includes an interesting "huff and puff" variant for VFO locking

http://www.qsl.net/g6uyj/freqcounter.html

http://members.optushome.com/vk3biz/micro.html
- basically a page of links to microcontroller projects

The first three are quite detailed in their descriptions, include source
code and pictures of completed units (two have PCB patterns).

Two pages of hits using search string "PIC frequency counter." There
are more sites of project examples out there.

Len Anderson
retired (from regular hours) electronic engineer person