I recently asked whether if I connected the MOSI pin from an AVR ISP MKII programmer directly to the MOSI pin on an Atmel ATmega328P, did the same for the MISO, SCK and Reset pins, and connected all GNDs and VCCs to a 5V power source, this arrangement would work.
The answer I got back was that it would but it would be a good idea to put resistors and capacitors on the Reset pin and decoupling capacitors on all the GND and VCC pins.
1) Are all these extras necessary and if so could you please link me to some schematics so that I know how to link the components together and could you please provide exact values of each of the components required i.e. “a 150ohm resistor”?
2) How far apart are the pins on the AVR ISP MKII programmer? I was looking through my rapid catalogue for DIL headers to slot the target cable from the programmer onto, and Rapid sell two different pitches, 2mm and 2.54mm. Which size shall I buy?
Thanks in advance for any help anyone can provide.