HP-65 card reader problems
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02-16-2020, 10:16 AM
Post: #12
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RE: HP-65 card reader problems
(02-16-2020 08:22 AM)coitboy2000 Wrote: Ok great When the card is detected in the slot by the CRC on the CPU board, it then sends a Logic LO signal to pin #17 of the sense chip which then outputs the motor drive voltage from pin #1. Some of this voltage is fed back to pin#2 through the 4K64 resistor to regulate the motor speed. cheers Tony |
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