Hi Harold,
The microcontroller (ATTiny13 chip) contains a computer program which sets the keying speed by looking at the state of pins 5,6, and 7 of the AT Tiny and setting the speed accordingly. So to set the speed by switch you really need to be able to switch all three of these pins, independently, ?to the 5 volt line (if the look at the schematic and the table of switch settings in section 7 all should, I hope, be clear - an "X" in the table means the pin is connected to the 5 volt line).
You can do this in the following ways :-
1. Use a Dual-In-Line switch wired to the board. You can salvage one of these from an old PCB or buy one form Radio Shack....
2. Use 3 on off (not momentary) switches wired to the board. You will need to have a case for the project to mount the switch on.?
3. Install 2 x female headers on the board and jumper wires between them - this is the easiest and cheapest method.?
I don't think there is a solution using a rotary switch (but I am willing to be proved wrong!)....
So glad that you guys are experimenting with the kits......
73s Steve G0XAR - The man who packs the kits and sends them out and occasionally screws up your orders :-(
--
Wisdom demands a new orientation of science and technology towards the organic, the gentle, the non-violent, the elegant and beautiful. E. F. Schumacher
