AVR Adapters so that you can flash your altimeter kits.
In order to be able to modify the code of your ATmega or ATtiny ship, you need to use an AVR programmer.
This is also very usefull to load the boot loader to the chip
The adapter kits that I have are for the ATMega 328
and ATtiny 84/85
It is then used with a standard cheap AVR programmer
Again I can provide those kits at a very reasonable price if you cannot do your own PCB
You can download the instructions to use those at the bottom of the download page.