I have no experience with programmers how ever I got a usbtiny isp and wish to program aTmega 328 chips for clocks I am building presently. However the usbtiny plug is different than that on the board and also different terms. I found a design for a simple add on but again the legs are different to that which is in the control circuit for the clock. for instance on the clock circuit pin 19 drives a pulse LED, one the add on for the usbtiny programmer THE LED IS DRIVEN FROM PIN 24,.... pin 17 , 18 , and 19 are used for the programming MOSI MISO AND SCK. I checked that on the datasheet it is correct. The control circuit uses pins 2, 3 and looks like 4 along with 1 for reset, 7 for VCC and 8 ans 22 for ground. On the control board 24 is not uesd nor it 17 or 18. If I make this add on and program with it will it affect the opperation of the 328 aTmega in the clock circuit. To me its very confusing.