HP-65 motor always on - card reader
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03-07-2024, 02:08 PM
Post: #6
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RE: HP-65 motor always on - card reader
The chip pinouts are the same, maybe there are some internal changes.
Circuit-wise, these aren't on the 65, but there are some diodes to drop the battery voltage on the 41 for the VCC pin, and some pullup resistors on the RA RB pins, and series resistors on the WA and WB pins. cheers Tony |
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Messages In This Thread |
HP-65 motor always on - card reader - Trevor Gale - 03-05-2024, 07:29 PM
RE: HP-65 motor always on - card reader - teenix - 03-05-2024, 09:10 PM
RE: HP-65 motor always on - card reader - Trevor Gale - 03-07-2024, 11:55 AM
RE: HP-65 motor always on - card reader - teenix - 03-07-2024, 12:26 PM
RE: HP-65 motor always on - card reader - Trevor Gale - 03-07-2024, 12:44 PM
RE: HP-65 motor always on - card reader - teenix - 03-07-2024 02:08 PM
RE: HP-65 motor always on - card reader - Trevor Gale - 03-08-2024, 10:53 AM
RE: HP-65 motor always on - card reader - Trevor Gale - 03-10-2024, 03:18 AM
RE: HP-65 motor always on - card reader - teenix - 03-10-2024, 04:18 AM
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