hi, i have a preexisting simple circuit that i need to be able to read and write toa attiny24 sioc.

the chips are already mounted onto a circuit board and i need to get the information off and back on again.

i see a bunch of avr dongles that can read the attiny24 but they have like a idc connector installed or a chip.
i could use one of these if i knew it worked, and if i need more circuitry to get them to work.
any ideas?
thanks

 

Can you provide a schematic of your circuit as it currently exists?

hgmjr