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I have an old laser printer, HP LaserJet 2100, with 2 ports:

enter image description here

I am using a Raspberry Pi as a network print server. The Pi is connected to the parallel port via a USB-to-Parallel cable. Raspberry Pi is powered by a micro-USB connector and cable.

I was thinking of finding or making a DIN8-to-Micro-USB power-only cable.

Does the extra DIN8 port supply (enough) power that can be used to power the Pi?
If so, what would the correct pinout be?

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closed as unclear what you're asking by Majenko, placeholder, Chetan Bhargava, Vladimir Cravero, Daniel Grillo Jul 21 '14 at 22:02

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ How the Hull should we know?! You haven't told us what the printer is, what the function of the port is, whether it even has any power connections in it, nothing! \$\endgroup\$ – Majenko Jul 21 '14 at 15:38
  • \$\begingroup\$ At a guess, it looks like Appletalk. Other than that, back to Majenko! \$\endgroup\$ – carveone Jul 21 '14 at 15:42
  • \$\begingroup\$ @Majenko: Sorry. I had (naively) assumed that this is a standard data port so the printer model is not important. I'll update the question. \$\endgroup\$ – Adi Shavit Jul 21 '14 at 15:44
  • \$\begingroup\$ @carveone It might be, or it might be a custom port for adding extra paper trays or something. Who knows? \$\endgroup\$ – Majenko Jul 21 '14 at 15:45
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    \$\begingroup\$ There is no power in a LocalTalk connector, so the answer to your question is NO. You can't do it. \$\endgroup\$ – Majenko Jul 21 '14 at 15:56
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Let's assume it's Appletalk or Localtalk. I think that's a safe bet given that's it is a)old b)laser and c)8 pin din.

In all cases, only ground is available. Which is the same as most other serial port connection systems, USB aside.

Edit: Confirmed (after my browser crashed on that PDF!). That's a LocalTalk port. They come in various levels (more functions on the pins) but none of them carry power I'm afraid. See http://www.interfacebus.com/Apple_MiniDIN_PinOut.html

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