WP-34s from HP-30B: FTDI Board alternative FLASHing Instructions

[iceman]

With pleasure Terje! I share your sense of satisfaction every time a new WP34S wakes up after FLASH. I should mention that I do not actually connect the power to the programming port. I use alligator clips to connect to the battery contacts. I hold the 1K resistors against the Tx and Rx contacts during FLASH (24 seconds). Seems to work fine.

I really have to admire the programming cable that Katie Wasserman designed - wow. I was going to build one. I even identified all the parts I would need to order from eBay, but it turns out that beryllium copper is hard to find in small quantities.

Also, see the wireless stuff Katie did in the same article. Again - wow

We all also owe a collective salute of appreciation to Eric Rechlin for producing such a high quality yet low priced overlay which I marvel at each time I apply the key pads with my tweezers under the magnifying lamp. By the way, if you have not caught it, his new video offers some invaluable tips.