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Thread: Can anyone do PCB design ?? and small batch manufacture ??

  1. #17
    root Member DanceswithUnix's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Quote Originally Posted by g8ina View Post
    yeah, I guess Im an easy read I didnt even give the Aduino a thought, nor a Pi, its a 2 chip design, it drives the LED directly from the 4017 and it runs off a 9v battery, Just need the PCB to be 30x50mm to fit in the ABS case and Im sorted.

    Started on KiCad yesterday, wow, what a package !!!! Its a very VERY steep learning curve but I think I have the hang of it
    Probably a couple of decades ago now, a semiconductor salesman said they didn't sell logic gates any more as a PIC processor was actually cheaper and for most things you could just program it up for whatever gate function you needed. That's only gotten sillier over the years so I suppose it shouldn't be a surprise that I don't see such designs any more.

    Low end controllers have a built in resonator that whilst usually pretty good can be 10% out on clock speed. A bit higher end (probably means spending £1.50 ) and you can run off a 16MHz crystal and get the timing tight. Being able to control the duty cycle of the LED might be nice, you can flash brighter for a short time to keep the average power in check, with the short time making it more of a defined strobe.

    A Pi is a rather different beast. You could NTP lock the timing to compensate the crystal, or even GPS lock the timings, but that seems a tad excessive. But then perhaps in the HiFi world a turntable strobe atomic clock locked via GPS PPS would have a market

  2. #18
    Grumpy and VERY old :( g8ina's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Yep, agree with all of that, this one uses a 4MHz-ish crystal, and I can set it to run at 50 or 60Hz with a single switch. Quite a demand in the hifi audio groups
    Cheers, David



  3. #19
    RIP Peterb ik9000's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Quote Originally Posted by g8ina View Post
    Yep, agree with all of that, this one uses a 4MHz-ish crystal, and I can set it to run at 50 or 60Hz with a single switch. Quite a demand in the hifi audio groups
    Why? Does it help avoid EM interference?

  4. #20
    root Member DanceswithUnix's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Quote Originally Posted by ik9000 View Post
    Why? Does it help avoid EM interference?
    To check your turntable is actually running at the right rpm, and a steady rpm at that.

    I probably still have the cardboard disk with black lines all over it that came with my Dual turntable that you could plonk where the record goes. Some turntables have raised blocks on the outer edge at the right spacing that they appear stationary if you point a 50Hz strobe at them. I've never had a strobe so never used it, but I'm sure I kept that disc

  5. #21
    RIP Peterb ik9000's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    I thought they went from 30-something to 70-something rpm though?

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    root Member DanceswithUnix's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Quote Originally Posted by ik9000 View Post
    I thought they went from 30-something to 70-something rpm though?
    Two rings of blocks, one for 33.33rpm and one for 45rpm. 78rpm is not so common.

    OFC being hi-fi, why use a printed cardboard disk when gold plate will do :


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    Moosing about! CAT-THE-FIFTH's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    I was going to suggest PCBWay, as I have seen them on the Retro Recipes channel as a sponsor:
    https://www.youtube.com/channel/UC6g...gaLfs3o2znuqXA

    Quote Originally Posted by ik9000 View Post
    Have you asked them to confirm their factory location, worker conditions and working hours?
    They are located in China!


    https://www.youtube.com/watch?v=_GVk_hEMjzs

    Another video of the factory:
    https://www.youtube.com/watch?v=o8NOK1JJbgw
    Last edited by CAT-THE-FIFTH; 22-04-2021 at 07:02 PM.

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  9. #24
    Banhammer in peace PeterB kalniel's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    We used to design and etch our own at school, but I suspect that's gone the way of health and safety (or at least environmental concerns) or I'd suggest getting in touch with your local!

  10. #25
    Super Moderator Jonj1611's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    We used to as well, used to draw the circuits on with pen then into the acid thingy
    Jon

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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    I sometimes make my own PCB boards for prototyping just to test it fully before sending it to a fab. I've used PCBway before, shipping times can be long if using the cheapest delivery option around 2-3weeks. Just make sure you set your PCB rules to PCBway capabilities.

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    I R Toff Pandi! TAKTAK's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    No news is good news, Dave?

    How did you get on?
    Post Counts and Other Rewards, Rules, Folding@Home, Fans: Push vs Pull vs Push-Pull, Corsair PSU OEMs.

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    TAKTAK.co.uk

  14. #28
    Grumpy and VERY old :( g8ina's Avatar
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    Re: Can anyone do PCB design ?? and small batch manufacture ??

    Sorted, JLCPCB is now making my 2nd batch of boards, 100x for 30 quid inc FedEx, should be here 25th (my birthday )

    SprintLayout is superb for the layout, cheap and it exports the Gerber files I needed.

    Sold my first batch of five off within 3 hours of posting in FB audio groups.
    Cheers, David



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