HP-82143A printer for you.

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Sun Feb 13 13:58:02 2005

> Group,
> I have this HP-82143A thermal "peripheral printer"
> sitting around, with the internal battery pack (won't
> charge). No charger included.

For those who don't know this device, it's a thermal printer that plugs
directly into the HP41 calculator, and can't (easily [1]) be used with
anything else.

[1] It connects to the NUT bus in the 41. Inside the 'plug' are 2 chips,
direct-on-board, one is a ROM containg the HP41 driver code, the other is
a pair of 56 bit shift-registers + logic. The printer talks to the latter
by 3 signals (basically, clock, data, direction), it contains a
mask-programmed microcontroller. Some details of the interface are knowm,
some stilll need to be hacked...

> This is what it looks like (image taken from the
> internet)-
> http://www.thimet.de/CalcCollection/Calculators/HP-41/HP-82143A-S.JPG
> I have no use for it, do you? It tries to work, but my
> HP-110 power adapter does not seem to have enough
> juice to make it go.

It's the same PSU as for the 110 (and for most other HP handheld devices
of that period), but IIRC you need a good battery pack in the printer as
well. The AC adapter on its own won't supply enough current for the motor
or printhead.

Received on Sun Feb 13 2005 - 13:58:02 GMT

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