[Swansea Hackspace] 3D Printer electronics

[Ceri Clatworthy]

Just found circuit diagram,

http://reprap.org/mediawiki/images/7/7d/Melzi-circuit.png

we could simply re-map Hot end to the AUX header, and change code in micro
??

Hot End on PA7 -> PA4.

just need a 4K7 resistor !!

Bit concerned that ALL sensors have 4u7F caps on them !!
Hot end, Hot Bed as well as X,Y, & Z endstops ?????

Ceri

On Tue, Jan 27, 2015 at 11:56 AM, Justin Mitchell <justin at discordia.org.uk>
wrote:

> On Tue, 2015-01-27 at 11:23 +0000, Ceri Clatworthy wrote:
> > Badnews: found atmel chip in stores, but it is ATMEGA16, we need
> > atmega1284-p-au
> >
> >
> > Will have a rummage in 'my' stores tomorrow ..
> >
>
> We needed to update to the RUMBA board anyway to fit tims printer
> upgrades, just means it has to be done sooner rather than later.
>
> The old board could still be useful for upgrading a cheap laser cutter
> or something, even with a damaged thermistor channel.
>
>
>
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>
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