HP 82164A HPIL->RS232 Schematic

[KeithB]

Is that available? I see that there is a battery powered converter in the want ads, and was pondering adding a battery to mine.

Upon reflection, though, it might be better to just create a battery powered 8 V AC inverter.

[BruceH]

The "82164A RS232 Interface Service Manual" includes a schematic. It's on a well-known HP41 site (whose URL gets replaced with asterisks if I try to include it here) or Erich Rechlin's HHC USB drive.

[Hiwi]

Hi Keith,
i applied a simple 9V DC adapter to the AC Port, as the voltage from the AC HP-Adapter is rectified.
This worked for charging my HPIL printer and using the RS232 interface.
I also tried to power the system with 2 Life batteries in series.
Works as well.
Ralf

[KeithB]

"applied a simple 9V DC adapter to the AC Port, as the voltage from the AC HP-Adapter is rectified.
This worked for charging my HPIL printer and using the RS232 interface.
I also tried to power the system with 2 Life batteries in series. "

What's the fun in that? 8^)

[Hiwi]

it's not fun it's real :-)

You can use a DC converter 9V to power the Interface.

This works for most stuff without mod.

The only exception is when an interface needs + and - voltages.