HP-25C Eumulator
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12-29-2014, 06:18 PM
(This post was last modified: 12-29-2014 06:23 PM by Chris Chung.)
Post: #120
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RE: HP-25C Eumulator
Order list update
V3 pcb list 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. |
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