Some parts have turned up for my ETI Vocoder project. The CMOS 4006 becomes part of an interesting circuit called a Linear Feedback Shift Register.
ETI Vocoder constructional project reproduced with permission from Wimborne Publishing Ltd. http://www.epemag.com
2 PCS. 4006 CMOS IC Bargain Pack CD4006 MC14006 HEF4006 http://www.ebay.co.uk/itm/-/220741044203
LM3915 Audio Level Indicator Electronic DIY Kit Part Components Production Suite http://www.ebay.co.uk/itm/-/371210211542

By Julian

Youtuber, shed dweller, solar charge controller aficionado

16 thoughts on “Postbag: #37 – eti vocoder parts – cmos 4006, lm3915”
  1. Avataaar/Circle Created with python_avatars ophello says:

    Wish you had twisted the pot while the noise was playing….

  2. Avataaar/Circle Created with python_avatars Chris Cain says:

    You’ve really inspired me to get my electronics head on after a long time

  3. Avataaar/Circle Created with python_avatars Mischief says:

    2 numbers are relatievely primes if they have only one common divider, so that means they dont have to be primes, like 4 and 9

  4. Avataaar/Circle Created with python_avatars Mr G Pen says:

    i would like to know how much it would cost me to buy one of each of the vocoder boards from you thank you gary

  5. Avataaar/Circle Created with python_avatars jlucasound says:

    You are picking up encoded communications by something.

  6. Avataaar/Circle Created with python_avatars jlucasound says:

    We are still waiting. One day you will unveil (so much for the "I" before "E" rule I was taught in school) the completed Vocoder.
    I CAN wait. Make it right. I think that is what you are doing, and you have much more on your "plate". That "box" is going to be awesome. You always get everything right. (Aside from crossed legs). Our secret. 😉 Julian. You have taught me so much.

  7. Avataaar/Circle Created with python_avatars jlucasound says:

    I'm from the Future!! Don't Solder the GREEN LED's IN!! They are too BRIGHT!! Oh, well, you already know. 😉 Love your videos, Jylian!!

  8. Avataaar/Circle Created with python_avatars Ryan Kerick says:

    I realize this is an older video, but for anyone in the US you can still get the CD4006 and CD4030 from NTE if you want to attempt to stick to the original design as much as possible.

  9. Avataaar/Circle Created with python_avatars Kbz says:

    Just found this video and instantly subscribed.

  10. Avataaar/Circle Created with python_avatars edgeeffect says:

    I quite like the sound you get on the second tap… it's got a low-fi techno feel to it.

  11. Avataaar/Circle Created with python_avatars edgeeffect says:

    I remember the ETI Vocoder and the Transendent 200… I just couldn't have dreamed of affording the parts back then but I used to like to re-read the magazine articles and dream.
    I'm looking forward to seeing your work on this project.

  12. Avataaar/Circle Created with python_avatars croonologist says:

    Hello:  What's the country of origin of the Powertran ETI vocoder?

  13. Avataaar/Circle Created with python_avatars Stephan Stanisic says:

    HaHa! Nederland toch een beetje populair! (Use translate ;P)

  14. Avataaar/Circle Created with python_avatars John Smith says:

    Hi Julian.
    I have a copy of the PDF but the main board overlay is missing, have you got a copy or are you building the main board from your own design.
    In the PDF it say send an sae to modmags to get a copy, im sure that wont any more.
    id love to build this project, any help would be appreciated.
    john

  15. Avataaar/Circle Created with python_avatars Mike Hawkins says:

    Why not use the HC devices?

  16. Avataaar/Circle Created with python_avatars migry says:

    £1.65 including postage, how the hell do they sell it for that price! Nice videos BTW!

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