HP Forum Archive 04

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Making a HP-67 charger Message #1 Posted by Tony G on 21 Nov 2000, 1:28 a.m. Does anyone know if it is worthwhile to assemble a HP-67 charger from easily available parts or if some existing part can be modified to do the job?

Re: Making a HP-67 charger Message #2 Posted by DaveJ on 21 Nov 2000, 12:57 p.m., in response to message #1 by Tony G I suppose it would be worthwhile to have a design available. Probably most collectors do not require one charger for each calc in their collection (of course some collectors want complete units with all accessories for each).

Re: Making a HP-67 charger Message #3 Posted by Todd Garabedian on 21 Nov 2000, 9:28 p.m., in response to message #1 by Tony G I suppose you could make one, but why? Those chargers are fairly easily available, so why not just buy one? Am I missing something? Todd

Re: Making a HP-67 charger Message #4 Posted by Les Bell (Australia) on 22 Nov 2000, 3:10 a.m., in response to message #3 by Todd Garabedian Several reasons, I guess: 220V/240V chargers are harder to find; one could design a smarter and faster charger than the HP one; one could design a charger for NiMH or Li-ion batteries; or just "because it's there"? The only tricky part would be sourcing a connector for the calc end of the cable. Best, --- Les [http://www.lesbell.com.au]

Re: Making a HP-67 charger Message #5 Posted by Katie on 22 Nov 2000, 2:17 p.m., in response to message #4 by Les Bell (Australia) I've looked for the connector plugs over the years with no luck and have concluded that they must have been a custom made part. In fact, the Heathkit OC-1401 (a very interesting LED RPN calculator/flight computer) which uses an almost identical charging/plug scheme to the HP classics doesn't use this plug, they seem to have come up with their own custom variation. -Katie

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