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HP-65 card reader problems
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02-02-2020, 11:38 AM
(This post was last modified: 02-02-2020 11:41 AM by teenix.)
Post: #6
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RE: HP-65 card reader problems
(02-02-2020 09:44 AM)teenix Wrote: Check that pin #11 on the sense chip goes to almost 0 volts when a card is inserted. Apologies, that should have been pin #17. Pin #18 should have constant 6V too. If you don't have one, there is a circuit here... http://www.hpcc.org/cdroms/schematics5.0...c/hp65.pdf cheers Tony |
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