3rd try is the charm =)
Turns out my 3478A was on channel 6, not 23 - and on the 3rd Arduino I programmed the EEPROM as well as the hex file. I don't know if one or both steps were necessary. I assume so because my old Arduino's aren't responding to serial.
All's well, tried a few GPIB commands and looks good =)
Congratulations, you passed the quest It makes me think I should start a Q&A section.
However those GPIB address and EEPROM issues do not explain what happened to the first couple of arduino boards?
Are they alive?
It's a mystery to me as well wit the first two boards, to be honest. I didn't try to make a serial connection to see if they responded before plugging them in, I have tried minimal testing with those two boards and have not been able to get them to respond whatsoever. I get programmer not responding errors with them. I may try to shock some life back into them at another time. i could also send them in a plain envelope to you if you wish to inspect them! postage would be like less than $10 to you for this and if it helps you in any way, i don't mind.
If they're of no use, no worries, if i can't revive them i will toss them.
By the way, doing two failed attempted installs for the bottom side gave me some good ideas on how to build an Arduino pro really slim with angle headers only. I ended up moving the +5V diode wire over to the 5V point right next to the ground wire in my above picture and get 4.95v off it so I am happy.
I was thinking, with long enough ribbon wire, you might be able to sneak the USB TTL connection wires out around the HPIB address dip switches. There seems to be plenty of room around it.
Oh - i almost forgot, the only other difference is that the two times it didn't work, I had the GPIB header from the back panel unplugged. This time , i plugged it back into its socket. I don't see why that should matter.
I tripped over that GPIB Address 23 as well but I forgot about it. It is somewhere in this trail
Yes, thank you; it's your post that made me realize I had to check that!
You deserve credit for sure