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Power Propeller from PS/2 +5V — Parallax Forums

Power Propeller from PS/2 +5V

NeXTenNeXTen Posts: 2
edited 2012-02-01 20:32 in Propeller 1
I'm looking at using a propeller to do a conversion between a PS/2 mouse and keyboard and NeXT machine. The NeXT provides +5V similar to a PS/2 though I believe you can draw more from it. I'm wondering whether this might be a practical power supply for a propeller (obviously, converted to 3.3V)? I can drive a PIC no problem...

Comments

  • kwinnkwinn Posts: 8,697
    edited 2012-02-01 19:32
    Should work fine as long as you use an LDO regulator to provide the 3.3V for the propeller.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2012-02-01 20:05
    NeXTen,

    Welcome to the forum! Ditto kwinn's comment. Like so many of Steve Jobs' creations (or sponsored creations), the NeXT was ahead of its time. Can you post some photos of yours? I've always been fascinated with them but, when they came out, couldn't afford to own one.

    -Phil
  • NeXTenNeXTen Posts: 2
    edited 2012-02-01 20:32
    Excellent. I'll go ahead an prototype it and see how it goes.... I was going to use a PIC, or maybe 2 to get the timing right. It's possible with a single PIC running at 8MHz but the interleaved timing would require some unnatural code (bit detection on 4 pins with cascading state machines with timing transitions) and the propeller, by contrast, will be perfect. I might even use the propeller to convert the DB19 port over to VGA/PS2, but the timing there is pretty extreme... the clock is 20MHz and from what I've seen so far, the data bus is 5Mhz. That doesn't leave a lot of wiggle room (I may use the XMOS there).

    6538750979_7383c5f62a_b.jpg



    I have a large NeXT collection. Some of the boxes can be seen here:http://www.flickr.com/photos/15578792@N02/
    6538750979_7383c5f62a_b.jpg
    1024 x 765 - 190K
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