Comments on: Making the Roland DXY-1200 pen plotter wireless (bluetooth) for about 10€

By: KaOS

KaOS — Sat, 22 Aug 2015 07:55:03 +0000

@scruss I found this

How much power can parallel port source
Comparision of different parallel port types
Normal UM82C11-C IEEE 1284 level II
Data output (>2.4V) 2.6 mA 2 mA 14 mA
Data line sink (<0.4V) 24 mA 24 mA 14 mA
Control output (>2.4 V) 0.5 mA* 1.5 mA ?
Signal lines (short circuit) 1 mA ? ?
Control line sink (<0.4V) 7 mA 7 mA 14 mA

but I don’t know what kind of port this is. It’s seems to be reasonable though. Second problem is that I don’t know yet how much the devices consume, but I guess I can measure it. Away from plotter now, so it’ll have to wait a bit.

above chart comes from this page which is definitely a valuable resource, but it’s talking about the host (PC) side, never about the plotter/printer side which might be a problem, or am I wrong?

By: KaOS

KaOS — Sat, 22 Aug 2015 07:39:52 +0000

In reply to scruss.

Interesting, the bluetooth isn’t exactly energy consuming, so it might work. I’ll look into it.

By: scruss

scruss — Fri, 21 Aug 2015 21:48:07 +0000

Just a thought: you might be able to power this from the plotter’s parallel port. It has a couple of pins that supply +5V. I don’t know if they can provide the necessary current, though

By: Cast42

Cast42 — Wed, 05 Aug 2015 20:13:53 +0000

Nice !

By: KaOS

KaOS — Sun, 02 Aug 2015 21:24:20 +0000

In reply to Doug. how do I test hardware handshaking? Will do the test if you want. K

By: Doug

Doug — Fri, 31 Jul 2015 21:25:34 +0000

Interesting, well done!
Does it support hardware handshaking?