Track108 & Spy109 - Two small transmitters for different purposes
This is a quite small project and it function at the same principles as my main work - 36HC108. Even here is the definition vague. A transmitter should have some sort of transistor, at least in the last stage before the antenna, but here uses we only the output from a HC logic circuit - as an end stage, and some kind of antenna of course.
The picture shows Spy109, built to be used outdoor:
If you want to look closer on this thing you can download it here:
In the zip-file
can you find everything required to implement it (manuals, diagrams and PCB-files)
- except to realizing it.