Development boards save time otherwise spent wiring up AVRs on breadboards and then pulling them up to make space and then re-wiring them up again later on. This board already has best practice support components around the AVR such as the noise and static protection on
and the bypass capacitor for the AVR power supply, which greatly improves the accuracy of the ADC.
This board also supports
ATtiny861. The top silk has been put on with the toner-transfer technique.
PB5to keep the traces short around the crystal
✝ for ATtiny?61 parts only
Revision 2 is laid out for a 20-pin ZIF socket, is easier to fabricate with fewer 0Ω links and has two TTL-level RS232 connectors. The clearances of all pins and vias have been set to 3500 mils and the drill holes set to 1500 mils regardless of the actual diamater of the pins. This helps to aim the drill bit for construction at home.
The archive contains a
gschem schematic and a single-sided