The keyer I made, mostly based on PIC16F84. The chip is easy to program and requires only small current and other component to make it work. I have several version of the Keyer, from the simple one up to the complex one.
Basic Iambic PIC Keyer
PIC Keyer with Memory
PIC Contest Keyer
Go to the page and see if you find what you're looking for.
This Beacon also uses PIC16F84. It is based heavily from the keyer project.
Beacon
The frequency counter was part of YBQRP project. It use 7-segment as display readout.
Frequency Counter
The interface here was designed for interfacing PC sound card with IC-2100H 2m Transceiver. I use it for radio packet communication with FlexNet software. Other software may work too. It is very simple and can be built as a weekend project.
SoundCard Interface
This project has not finished yet. It still under development. The goal is to build a 80m receiver using TA7310P as mixer and product detector. (well, too much for a small thing may be ...).
Due to lack of measurement equipment, the characteristic of the receiver has not been determined yet. I expect to have feed back from reader to finalize the design. Please send email to me (kb9vcb@qsl.net)
80m Receiver