Re: C2N ideas/thoughts?

Re: C2N ideas/thoughts?

From: Marko Mäkelä <>
Date: Tue, 30 Jun 2009 10:29:34 +0300
Message-ID: <20090630072934.GB26186@x60s>
Hi Jim,

> I will label the board tonight.

That would be handy too.  I only meant the schematic diagram, though.

>> Also, Kicad <> is a free (as in speech)
>> alternative to Cadsoft Eagle.  I haven't looked at yet, but if it is
>> good enough for a mobile phone <>,
>> it should suffice for any hobby project.
> I've downloaded it, and it looks like a nice tool, but I've invested a  
> lot of time in EAGLE libraries and designs.  I admit I did not do an  
> exhaustive search, but I was having trouble finding a nice way to  
> convert libraries and designs to KiCAD.  The scripts I found were  
> incomplete or contained errors.

I didn't even go that far yet, but I will seriously consider using
Kicad for my next project, whatever it will be.  My latest project
is a tiny 5-volt power supply for powering and charging mobile devices
from a bicycle dynamo hub.

> I intended that folks would install a IC socket for the uC, and that  
> could accommodate connection to the unconnected pins via a daughterboard.

That is a possibility, if you cannot fit the connections on the main
circuit board.

>> If you boot up the computer with SENSE=0, it will "think" that you are
>> trying to rewind or fast-forward the tape, and it will be supplying power
>> on the MOTOR line.  That is why you need to control the SENSE line in some
>> way.
> Well, as it is wired right now, SENSE will come up as an input, so I  
> think I'm OK.

If you wire both SENSE signals (from computer and from external tape drive)
to GPIO pins, you should be fine.  SENSE is an I/O signal on some Commodores
and input only in others.

> I'll wire in the voltage divider for MOTOR.

Yeah, MOTOR needs to be input only in the microcontroller, and you can pass
it through to any external tape drive.


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Received on 2009-06-30 09:37:26

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