HP-25C Eumulator

[Chris Chung]

Order list update

V3 pcb list
Mr. H, Guenter, BobVA X2, EdS2, Nigel, Namir X2, Didier, Mr. J, Mark (11)
The 1st batch has been filled.

If you have any issue, please let me know so that I can try and resolve. I know they are not perfect and after assembling all these units, I notice there are areas that can / should be improved. It is very different to build a couple for myself and to build a few dozen. I actually got 12 boards for this batch from my fabricator and had wasted one (including all parts) because I am not careful, and the current PCB design does not tolerate much error (especially the component on both side strategy).


Extra board / 2nd batch list
John, SlideRule, Brouhaha X2, PANAMATIK, Etienne, Lourens, viaPM1, viaPM2, BobVA, viaPM3 (11)

I am getting additional orders via PM and the next batch of PCBs have been filled.

I am expecting them to come in next week and will notify you all when it happens.

I am also working to adjust the V3 boards, mainly the hole size for the smd tactile buttons, currently there are a tad larger and did not align nicely w/ the new low-profile smd buttons. You may ask why I am using smd parts on holes. The reason is that I am using the holes to align the parts (they have to be bent) as I (or most kit-builders) can't afford stencils / ovens / pick-and-place setups. I hope my next try will get them right.

If there are additional requests, they will be placed in a list for another round of 10 units.

P.S. for those who got the units, if the flux / rosin really bothers you, you can try and use alcohol / nail polish remover and a used toothbrush on them. Be sure to remove the battery 1st and dry afterwards. I did not try this method though. The flux residue is quite common when hand solder on "white" PCBs.

Happy holidays.