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Old Nov 21, 2012, 06:01 PM
PLD
Magicsmoke maker
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Australia, QLD, Charters Towers
Joined Dec 2003
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Idea
PLD OpenBAC units

I've been trying for the last 8 months to find a manufacturer to take over the production of the BAC units that I have (primarily the BAC-55C and BAC-ESJ6) so, I guess there's not a lot left for me to do other than to Open-Hardware/Source the PLD BAC units.

These will be released under a non-commercial free licence, that is to say that if you want to commercially produce these you will still have to licence the design from me. For hobbiests, it's all open.

The PLD-BAC-55C is the result of over 20 design revisions over 4 years of work. It's not the easiest thing to build due to it using the very small Attiny10 (or 5) microcontroller, which you'll need to program before soldering to the board with a TPI type programmer (not the normal SPI type that you use with most AVRs).

I'll put up the PCB files (Eagle) and firmware code in the coming days.

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Last edited by PLD; Nov 22, 2012 at 07:53 PM.
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Old Nov 21, 2012, 07:43 PM
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London, UK
Joined Jan 2009
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That's great! I'm sure I, and many others, will learn a lot from studying your battle-tested design. Do you think you might publish the older revisions as well? It would be really interesting to see the evolution of the design.


Jony
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Old Nov 21, 2012, 07:50 PM
PLD
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Australia, QLD, Charters Towers
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Jony,

I'll probably put out a couple of the 'turning point' design revisions, there's about 4 of those, where things were notably changed (usually either because of part supply issues or making it easier to assemble quickly, or optimising part counts).

You can build these by hand, most of the resistors are 0603 size, which while being 'small' isn't as bad as trying to manage 0402 which will drive you insane
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Old Nov 21, 2012, 10:19 PM
PLD
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Australia, QLD, Charters Towers
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Source-code for the BAC55C

...
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Last edited by PLD; Nov 22, 2012 at 07:56 PM.
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Old Nov 22, 2012, 07:55 PM
PLD
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Australia, QLD, Charters Towers
Joined Dec 2003
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The complete package file is now loaded up on the first-post of this thread, it includes the source and eagle files.

Please note - if you're a commercial entity wanting to produce these BAC units, you will need to licence them from me still. Non-commercial production by fellow DLG'ers is permitted under the BSD and CERN licences as included in the zip file.
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Old Nov 23, 2012, 05:01 PM
Just a plane Junkie
Portland, Oregon
Joined May 2002
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Very cool! Thanks Paul.
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Old Nov 25, 2012, 06:53 PM
PLD
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Australia, QLD, Charters Towers
Joined Dec 2003
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I might release the earlier version of the BAC, using the Tiny13 chip, since it's a lot easier to manage than the T10.
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