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Assembling my new input amplifier PCB with potentiometers and 1/4" mono jack plugs
ETI Vocoder constructional project reproduced with kind permission of Wimborne Publishing Ltd. http://www.epemag.com

By Julian

Youtuber, shed dweller, solar charge controller aficionado

14 thoughts on “New pcbs – jack daughter and input amplifier – vocoder”
  1. Avataaar/Circle Created with python_avatars Franko Walker says:

    That PCB with the daughter board is a work of art! Well done, Sir!

  2. Avataaar/Circle Created with python_avatars Roy Tellason says:

    "That little tab" on the pot is referred to as a locating pin. This goes back to the days when pots were connected with wires rather than going into a circuit board, and was useful in that equipment which had front-panel markings, like a 0-100 scale or something of the sort. I can remember seeing this mentioned in a very early servicing text, which also stated that if you were replacing a pot and it didn't have a hole for that pin, you should bend it over (if metal), or snap it off (if bakelite).

    I'm surprised at soldering while pins are in a breadboard. The whole point of those is "solderless". 🙂 I would have expected some plastic melting to be happening there…

  3. Avataaar/Circle Created with python_avatars LJ Prep says:

    Julian, as a quick'n'dirty fix, wrap a couple (or more?) turns of twine or string around the threaded portion of the pot to space it from the back of the board. Or, if you have a sander, thin the plastic washer slightly so it all lines up.

  4. Avataaar/Circle Created with python_avatars Tyler Schreiber says:

    Hello I was wondering if you could review or post bag a sabertooth dual motor speed controller. More specifically how to control it manually without the use or remote control. I understand it uses PWM and am looking to control a tracked vehicle with a “wired” joystick or twist throttle like ebikes. Thanks

  5. Avataaar/Circle Created with python_avatars line10cls says:

    How to clean a soldering iron tip. scrape iron tip against edge of sponge like cleaning paint off a paint brush back into paint can ( this flicks excess solder off tip ). what you are doing is like trying to clean a paint brush in a cloth. not a criticisms just a tip

  6. Avataaar/Circle Created with python_avatars SoundsFantastic says:

    You're forgetting about the mic sensitivity to frequency that could cause the treble and bass difference.

  7. Avataaar/Circle Created with python_avatars FangornTiger says:

    Buy a box of washers from hardware store or lidls, they're standard sizes.

  8. Avataaar/Circle Created with python_avatars Tom Storey says:

    That satisfying feeling when everything is lined up and spaced just right, and everything just fits together!

  9. Avataaar/Circle Created with python_avatars Cray Ze Ape says:

    You missed the opportunity to add another function to the board. An 8 pin SMD footprint in the middle (connected to the pins) would have been a good addition, adding the function of SMD to DIL adapter to the board .

  10. Avataaar/Circle Created with python_avatars Da ve says:

    Neva rite mother board now daughter boards 😂😂😂😂fs

  11. Avataaar/Circle Created with python_avatars LoKee says:

    Brilliant as always, but why didn't you include "3-D Spectacular" in the title?

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

    Beautiful system engineering Julian, but…

    You better hope you never need to service that card now 🙂

    Also, looking at the daughter card, might it have been easier from a soldering point of view to not use the corner pins of the "8 pin package" but instead use the rear 4 pins so you didnt have the awkwardness of soldering under the pots ?

  13. Avataaar/Circle Created with python_avatars Alex C says:

    You don't need to get more jacks to get more washers… you can just get them from a store…

  14. Avataaar/Circle Created with python_avatars Angélique Robaye says:

    Beautiful.

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