EEVblog #588 – How To Do PCB Production Testing

Dave shows how the assemblers will production test the µCurrent PCB panels using his new test jigs. And he will does a trial run on 50 µCurrent PCB’s to determine the average testing time. What will take the longest – PCB testing, or wrapping, or packaging?
Soltronico PCB Assembly
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  1. The board that failed at the microamps range will also benefit from a touch-up on the high-current shunt resistor. The solder joint looks pretty bad there.

  2. With these dicky connectors, we’re screwed.

    Really liked that one, you’re covering great part of PCB design and manufacturing. I hope you post more videos on PCB routing and other tips on AD.

    Cheers, keep up good work!

  3. Your assembler should buy an Automatic Optical Inspection machine (AOI). A bad joint like the one you found wouldn’t have been missed by an AOI. Also fixing the problem before testing means less failures and so less time lost trouble shooting.

  4. The only thing i saw it was missing in the test, is the power supply by the BATTERY. The solder joints OF the BATTERY Holder could skip. But i Also know that is not very easy to do. Even with that issue, good work Dave.

  5. So where’d you get those serial number stickers printed up? Shiny and all that?

  6. Nice video, helps us see some of those aspects that we sometimes forget about!

    Re: cutting up anti-static bubble wrap – have you looked into the self-seal anti-static bubble wrap bags? Could save you lots of cutting time.

  7. Is it posible to buy one of them? Missed out on the crowdf due to a hospital stay.

  8. Ps.. the robot-italy link dosent..

  9. I received uCurrent number 125 yesterday.

    It still had a few dicky connections.
    I didn’t measure them, but I could move the binding posts a little bit.

  10. Adding the test power via the bits that break off is very clever. Cool technique Dave. Love the automatic tester board too.

    • Not exactly unusual – I’ve seen it done a lot for debug connections and other things – the debug connector can break off or go to a connector that leads to a breakout board with JTAG, serial and other things on it. If you need to ship one to a customer as a prototype, you break off the board and put it in the box.

      Some more clever ones do it so you could have two boards flat, or attach a ribbon cable between the two, allowing for flexibility – the traces run through the breakout tabs so if you have it as a flat board, you do nothing. If you wanted it separate, you broke it in half and soldered a ribbon cable, or connector, or whatever.

      Of course, the downside is, sometimes you inadvertently break off the extension. We had to repair this, and later boards we epoxied a reinforcing piece so it wasn’t possible to break it off anymore for development.

  11. Thanks for sharing your step by step video! Lots of great tips and some that we tend to forget about.

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