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Thread: New Teensy 4.1 DIY Synthesizer

  1. #126
    Senior Member Rolfdegen's Avatar
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    The 1st draft in 3D


  2. #127
    Senior Member Rolfdegen's Avatar
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    It is progressing ..


    The 3D model of the motherboard. The board is roughly the size of a laboratory card in euro format (160 x 100).


    The Fx module is simply plugged onto the back.







    The current prototype



    Greetings Rolf

  3. #128
    Senior Member Rolfdegen's Avatar
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    Hallo friends


    The board is now ready. We thought about integrating an expansion connection (K4, K8 ) in the synthesizer for the electronics hobbyist).


    It consists of 3 analog inputs (0-3.3V), as well as data lines and power supply for controlling a second 74HC595.


    This means that potentiometers, switches and control voltages can be queried via two 16-channel analog multiplexers (74HC4067), for example.


    Frontside


    Backside


    Control Circuit with expansion connect ( K4, K8 )


    Greetings. Rolf

  4. #129
    Senior Member Rolfdegen's Avatar
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    Hallo friends..

    Now we are done and we start producing circuit boards in China







    Gruß Rolf

  5. #130
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    Hi,
    Looking very good!
    What will be your business model for this? Can I start ordering a a teensy 4.1 and audio board?
    Thank you
    Daniel

  6. #131
    Senior Member Rolfdegen's Avatar
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    Hi Daniel

    The PCB boards or DIY kit with case can be ordered in future from Tubeohm.com.

    You don't need an audio card. An 16Bit audio converter (PT8211) is fitted on the board.

    Greetings Rolf

  7. #132
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    Hi Rolf, can you tell me when the board will be available?

  8. #133
    Hello rolf! How much $ and how long until a Jeannie is in my hands here in California? I don't see them on tubeohm yet. Also, the presets seem identical to my Tsynth...how did that happen? Are they a set of known synth presets used by a bunch of synth designers?

  9. #134
    Senior Member Rolfdegen's Avatar
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    @alfrede
    We are waiting for the first boards. It will take a while before circuit boards or kits can be ordered.

    @trevorbryden
    The Jeannie Synth-core is a little different from TSynth. It's smaller and has 8 voices, 8 banks with 64 different waveforms, Sequencer, 24-bit Fx chip for reverb, delay, corus and more. LowPass filter at the output to reduce high frequencies. Boost switch for more depth. It will be a transparent yello plexiglass case.

    The price has not yet been determined. We are still negotiating with dealers in different countries.

    Greetings from germany. Rolf

  10. #135
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    I'll be watching this space.

  11. #136
    Senior Member Rolfdegen's Avatar
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    Hello..


    It won't be long before we can hold the circuit boards in our hands and then test them.


    My friend Andre has already published the "Jeannie" project on his homepage tubeohm.com.


    Link: https://www.tubeohm.com/new-developement.html


    Greetings Rolf

  12. #137
    Senior Member Rolfdegen's Avatar
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    My friend Andre is busy soldering. I'm curious ..

    Soldering the components shouldn't be a problem. I hope the SMD pads are not too small and can be soldered well.






    Example of the first case








    Greetings. Rolf
    Last edited by Rolfdegen; 04-14-2021 at 04:03 PM.

  13. #138
    I'm sure Andre is a great guy, but Jeannie needs some new friends out here in California!

  14. #139
    Senior Member Rolfdegen's Avatar
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    Yes.. I think so

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