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Thread: Eurorackmodular Teensy/Arduino Sequencer?

  1. #1
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    Eurorackmodular Teensy/Arduino Sequencer?

    Sorry in fadvance i am a total noob with microcontrollers. Rather an Musician and analog electronics fiddler i stumbled upon the teensy and its capabilitys by some modules recently emerging on the diy market. Me and a friend (he is a fullfledged IT specialist) had a few thougths on the perfect Sequencer/Controller/etc... well the heart of it all.
    We came to the conclusion that there is no pefect. Each person has his own way of doing things. so we wanted to build a platform. i came up with a "simple" idea.

    We wanted to use this shield for arduino https://store.digilentinc.com/analog...e-arduino-uno/

    Question 1. it says for arduino uno but teensyduino seems to handle that. correct?

    I would tend to use a teensy 3.x rather than the uno.

    thank you in advance

  2. #2
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    This shield is made to plug on top of a UNO. The Teensys are physically smaller than the UNO so the shield will not directly fit the Teensy. Some type of adapter, or maybe even straight wires would be needed to make the two mate up.

    If you need the 16 bit converters for audio purposes, then use the Teensy Audio Adapter. It has a pair of 16 bit A/D's and a pair of 16 bit D/A's. Two of them can be used on a single teensy.

    The Teensy has several analog inputs capable of reading analog control voltages, pots or FSR drum pads. There are multiple digital inputs for reading buttons or switches. They have been used by dozens of MIDI controller builders without much additional electronics.

  3. #3
    Senior Member PaulStoffregen's Avatar
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    That shield can probably be made to work, but it might not be the best choice.

    What is the best choice depends. It depends on things you didn't tell us. Circuits that are best for AC-coupled audio signals aren't always the best way do to DC-coupled control voltages, for example.

  4. #4
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    Quote Originally Posted by kaoz View Post
    Sorry in fadvance i am a total noob with microcontrollers. Rather an Musician and analog electronics fiddler i stumbled upon the teensy and its capabilitys by some modules recently emerging on the diy market. Me and a friend (he is a fullfledged IT specialist) had a few thougths on the perfect Sequencer/Controller/etc... well the heart of it all.
    We came to the conclusion that there is no pefect. Each person has his own way of doing things. so we wanted to build a platform. i came up with a "simple" idea.

    We wanted to use this shield for arduino https://store.digilentinc.com/analog...e-arduino-uno/

    Question 1. it says for arduino uno but teensyduino seems to handle that. correct?

    I would tend to use a teensy 3.x rather than the uno.

    thank you in advance
    there's no reason why DAC8564 and ADS8343 shouldn't work with teensy, so yeah, it'll somewhat depend on the details, and your DIY skills.

    - for a _standalone_ sequencer, it might not be a bad choice, mainly (IMO) because the thing comes with boost converters / onboard dual supply, so you can get bipolar output, while powering the thing from a single 5V supply. so you wouldn't have to deal with that. the input/output stages and ranges look vaguely suitable for modular synth work (ie, CV stuff), too. but as the others have said, you'd still need some kind of adapter board to use it with a teensy. though conceivably this could be part of the UI / control PCB.

    - for a module, where you already have +/- 12V rails, it comes with a lot of unneeded baggage (boost converters, unwieldy/unsuitable form factor etc) and is fairly expensive. a single DAC8564 costs much less and can easily be soldered by hand (both Yarns and OC use it, and hundreds of people have successfully DIY'ed those). and i guess you could say a 4x 16bit ADC such as ADS8343 is a bit overkill for a sequencer. though it can't hurt either, i suppose.
    Last edited by mxxx; 01-12-2017 at 10:36 AM. Reason: typos

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