PCB Prototype $2 for 10 PCBs (Any Color): https://jlcpcb.com
https://www.patreon.com/julian256
Another PCB for my Vocoder build. This is the 10-LED level meter using the LM3915 integrated circuit.
Micro JST 2.54mm 2Pin 3 4p Male Female housing Connector plug & crimps x 60 SETS https://ebay.us/BnMqVZ

By Julian

Youtuber, shed dweller, solar charge controller aficionado

14 thoughts on “New pcbs – lm3915 led audio level meter – vocoder”
  1. Avataaar/Circle Created with python_avatars wreckless _ says:

    How come you don’t put your PCB where we can order them too?

  2. Avataaar/Circle Created with python_avatars DAVID GREGORY KERR says:

    You could try the liquid flux that Tronicsfix uses.

  3. Avataaar/Circle Created with python_avatars Richard KB Formally FireballXL5 says:

    Hi Julian I believe you could trim the edge of the RCA PCB and be able to remove the IC and have the capacitor stand vertical.

  4. Avataaar/Circle Created with python_avatars Jan Jeronimus says:

    Glue two pieces of wood on the panel (that also give distance).
    Use two wood screws.

  5. Avataaar/Circle Created with python_avatars Jason Park says:

    You are obviously not a "Maker" Julian.

    If you were. You wouldn't be looking at complicated spring solutions.

    HOT GLUE!

  6. Avataaar/Circle Created with python_avatars Simon John says:

    I've got to agree re. the solder – just got some Chinese stuff and its seems blobby and grey – which probably means its mislabelled lead-free crud. Back to Rapid, the savings are cancelled out by the amount of extra time/flux/cleanup needed. I paid £2.69 for 100g of 0.7mm 2% flux 60/40, Rapid is only £4.90 (plus shipping) for the same spec; if you can setup a trade account with them!

  7. Avataaar/Circle Created with python_avatars Guitronimos Kitchen says:

    I watched the full 30 minutes and you didn't even try to power it on. AHHH 😀 WE WANT SMOKE! Just kidding. Nice to see things going further! Cheers!

  8. Avataaar/Circle Created with python_avatars vonries says:

    I've been hearing you talk about this vocoder for months now, and I must I missed the first episode. Because I have yet to hear why you want it and what you're going to do with it. Do you plan on encrypting all of your voice phone calls, or make a musical instrument? Catch us all up to date please, pretty please. I'm sorry but I'm tired of watching a drawn out project and having no idea what your goal is. My apologies, but.

  9. Avataaar/Circle Created with python_avatars Christopher Hauck says:

    why not use atx standard colors and if you need a beefy -12v rail add in a second voltage inverter since an atx psu already has what you need
    yellow=+12v red=+5v blue=-12v
    plus you can even have an easy soft power circuit using the existing ps-on signal line and even tie it to the pwr-good signal for if you short something out on a scp equipped psu (pwr-good is high when all is ok and ps-on is active low as well as the +5vsb for your power on circuitry/always on micro)
    oops pwr-good is pwr-ok and is often gray and ps-on is often green ground is black and purple is +5vsb
    edit: lol just google the atx-20 pin to get it all (24/28 pin ones just add extra pins for +3.3v and +12v and +5v)
    note: a picopsu will do the job if your device is mostly glue logic and +/-12v op-amps due to the beefy included 12v-5v-3.3v regulators and you can just hook it to your solar grid of 10-13.8v

  10. Avataaar/Circle Created with python_avatars Stuart Hatto says:

    I need to look at the video again but I swear you put those ICs in the wrong way around according to your silk screen

  11. Avataaar/Circle Created with python_avatars Edmorbus says:

    Julian use nail cutter

  12. Avataaar/Circle Created with python_avatars Peer Appel says:

    Hey, you should try to measure the AC voltage over the tip of your ts100 iron and ground. That will probably scare you… 😉

  13. Avataaar/Circle Created with python_avatars Alan Hartley says:

    I have had no luck with Chinese solder. It seems to have a very dull finish and it wicks up the lead on the component. One of them had the ratios printed as 60 Pb 40 Sn, which would seem to explain this. They were advertised with the opposite ratio.

  14. Avataaar/Circle Created with python_avatars Morgan says:

    Yeah, IME cheap Chinese solder from eBay just plain isn't worth it.
    All the stuff I've seen exhibits a complete and utter lack of flux regardless of what the label might say.
    You're better off buying a big roll from a reputable supplier. Considering the speed you go through it as a hobbyist it's really not that expensive, and the cost difference is worth it for the lack of frustration 😉

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