The
Lazy Adapter is composed of a 20 pin DIP socket, a 20 pin DIP
header, and 6 pin ISP header, and a small phenolic circuit
board to hold them all together. The green fiberglass PCB is a
Dontronics DT104 SIMSTIC(This plug is in return for a favor.)
I am tired of wiring up ISP sockets for every little
breadboard I build, so I built this little adapter. It plugs
into a 20 pin IC socket for an AVR on a breadboard. On
the adapter is the 6 pin ISP header in the same configuration
used on the STK-500. Besides saving me time, it also means I
don't have to make room on the prototype for the ISP header.
I've also made an 8 pin version for the ATTiny12.
The writing is simple: pins on the 20 pin socket are soldered
to the corresponding pins on the 20 pin header. The six
pins of the ISP header, as identified in the AVR910
application note from Atmel, are wired to the corresponding
pins on the 20 pin socket, as identified by the AT90S2313
datasheet.
Below is a wiring diagram showing the adapter for the 20 pin
AVR processors.
Wiring for the 20
pin adapter. The wiring for the 8 pin adapter is similar, though the pin numbers are
different.
I have also made 8 and 28 pin adapters. I couldn't find
a 28 pin header, so I made one with two 14 pin headers.
