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Thread: Anyone recognize this enclosure?

  1. #1
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    Anyone recognize this enclosure?

    Not music related, but does anyone recognize this enclosure?

    1286431_1-777x437.jpg

  2. #2
    g1
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    Metal bottom?
    Is this a quiz or trick question?
    It looks real familiar but I can't place it.
    "there's another kind of party lights that I can't stand to see,
    when there's a man in that patrol car and he don't wanna party with me"

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    Senior Member Enzo's Avatar
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    What is on the other end of the cord?

    If I had to hazard a guess, I might think something like a dimmer/speed control for something on the other end of the cord. The missing IC might be a controller of some sort. This could even be some sort of remote controller, similar to the old X-10 stuff for home automation. (RF signals were sent through your home power wiring to receivers to control lighting, or outlets or whatever.

    Oh, apparently X-10 is still on the market, I last used it a long time ago.

    What is the TO220? Is it a voltage regulator? Or a triac? My controller would have a triac. over by the IC is a TO92, could it be a 78L05 or something?
    Education is what you're left with after you have forgotten what you have learned.

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    I see I didn't clarify my question.

    It's the plastic enclosure I'm after - the unit is a CDI trigger for a motorcycle, driven off a PIC16F286. That's an excellent and accurate observation Enzo. The IC has a 5v regulator and is the controller that sets the timing advance and fires the triac.

    I've built a different unit for TCI but it's the specific enclosure that I'm after. Looks pretty heavy-duty and possibly ABS. Just the job - strong and not too deep. Strangely, a grounded metal case doesn't work and the PIC misfires. Even bringing the board within 5mm of a grounded surface affects it. Maybe something due to capacitance. Perhaps that's the reason most of these things are plastic and often filled with resin.

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    Senior Member Enzo's Avatar
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    It is quite possibly, and I would guess probably, a custom molding for the OEM. A commercial small enclosure wouldn't probably have the square cord cutout. And the sides of the hole don't look hand cut to me. SO that's wwhy I think custom.

    Is it rigid, or is it like hard rubber, sturdy but slightly flexible?

    You need one or a hundred of them? Does it need to be waterproof/weatherproof?

    My crude calculation from the photo is your walls are about 0.1 inch thick? Whatever 1/10" is in metric? I see boxes similar in Bud and Hammond. But just googling "plastic electronic enclosures" found a bunch of places, like this one:
    https://www.polycase.com/product-categories
    Education is what you're left with after you have forgotten what you have learned.

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    It's a DIY project but the builder is not contactable. Maybe he rehoused the PCB into an existing OEM unit. It sure looks tough enough to go on a vehicle and the wall thickness looks to me to be unusually heavy. I have a working prototype of my own ready to install and it looks like I'll have to settle for what's available. There are a few bike people who would be interested if it worked out OK, but maybe 3 or 4 would be all I'd want to build.

    If it was a really successful project I'd go to the trouble of milling out a slab of ABS and cut a lid and gasket to suit.

    It works fine on the bench so I'm hopeful it will actually work in practice.

  7. #7
    g1
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    I had some oddball power transformer for computer equipment that was in a similar casing.
    Out of curiosity, what bike is this for? (looks like '80's?)
    "there's another kind of party lights that I can't stand to see,
    when there's a man in that patrol car and he don't wanna party with me"

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    Here's a link to the site. The setup is intended (I think) for older, pre-ECU bikes.

    AC-CDI 16F628 v7.9 ? CDI for mono-cylinder

    My circuit is different and will be used on my Enfield Bullet 500. The advance curve on the OEM ignition is fixed and not optimized, hence the reason to build a programmable unit. I actually got the engine running with the new ignition about an hour ago. I'm using the same processor but different code. My bike has an inductive pickup rather than Hall, so needs an amplifier and signal conditioning to convert to square-wave TTL. As I'm using TCI I don't need to switch 400v to fire the coil - just an IGBT to switch the ground side of a regular coil.

  9. #9
    g1
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    Quote Originally Posted by Mick Bailey View Post
    will be used on my Enfield Bullet 500.
    Brit or Indian vintage?
    "there's another kind of party lights that I can't stand to see,
    when there's a man in that patrol car and he don't wanna party with me"

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    An Indian one - a 2007 Electra X with the AVL engine.

  11. #11
    g1
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    Nice. I recently entered the world of liquid cooling and full fairings. I sure miss the ease of maintenance with air-cooled open engine.
    "there's another kind of party lights that I can't stand to see,
    when there's a man in that patrol car and he don't wanna party with me"

  12. #12
    "Thermionic Apocalypse" -JT nickb's Avatar
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    Quote Originally Posted by Mick Bailey View Post
    Not music related, but does anyone recognize this enclosure?

    Click image for larger version. 

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    This reminds me greatly of a potting enclosure so try Googling that. I came up with this at the top of the list ABS Box Miniature Multipurpose Potting Box Black 26x18x13mm Case Enclosure Box | eBay
    Mick Bailey likes this.
    Experience is something you get, just after you really needed it.

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    Good one - I may end up potting it in the end anyhow.

    In the meantime I'm looking at why a ground plane knocks out the PIC. I'm thinking it isn't stray capacitance, but a differential potential in the grounding due to EMI. It's stable without the coil connected. A nice little Christmas puzzle to solve.

  14. #14
    "Thermionic Apocalypse" -JT nickb's Avatar
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    I would look at the sensitive inductive pickup trigger for issues first. A wiring diagram would be handy understand the current paths.
    Experience is something you get, just after you really needed it.

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    My design is still evolving and needs more work, but I've overcome the metal enclosure issue and grounding. The pickup side was fine, but the PIC needed all unused pins either grounding or pulling up, and the existing pull-up resistors reducing in value from 10k to 4.7k. This has completely solved the circuit stability and now means I can use a grounded Hammond box.
    nickb, g1 and eschertron like this.

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