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Type: Posts; User: elkayem

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    Thanks for the tip! I will update the list of...

    Thanks for the tip! I will update the list of materials.
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    If you can find a 7.7k resistor, by all means use...

    If you can find a 7.7k resistor, by all means use that! 4.7k and 3k are more common. Be sure to use metal film resistors which are more temperature stable.
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    Wes, I'm glad you found this useful! In response...

    Wes, I'm glad you found this useful! In response to your first question, yes I did choose the Teensy 2 because I wanted to use 5V logic. I see no reason you couldn't use a 3.3V board. You will...
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    I did not have any ground loop issues. I...

    I did not have any ground loop issues. I primarily use my iPad so don't need to worry about the USB ground. At least one ground is required for the CV out, and the others can be disconnected if...
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    Oddson, you've inspired me to add the ability not...

    Oddson, you've inspired me to add the ability not only to configure the scale factor calibration at compile time, but through the user interface (and stored in EEPROM). My own build required...
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    I would have preferred to use a higher voltage...

    I would have preferred to use a higher voltage DAC were it not for cost. The 12-bit, 2-channel MCP4822 is hard to beat at $3/chip from Mouser.

    Your post has me thinking, maybe I should make the...
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    Oh WOW! Now you’ve got me excited. Your design...

    Oh WOW! Now you’ve got me excited. Your design is exactly what I was hoping for! Now I have my next project. Off to Mouser and eBay to procure some parts...
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    Seems like something that should be standardized....

    Seems like something that should be standardized.

    I can’t help noticing your username and the instrument you are playing in your photo. I would love to BUILD (not buy) a Theremin. There are...
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    Thanks, very useful info! I wasn't aware there...

    Thanks, very useful info! I wasn't aware there was a convention on middle C volt output. I am using only a single sided supply, and limited myself to the 88 notes on the keyboard with A0 (Note 21) =...
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    Take a look just a little bit further in the code...

    Take a look just a little bit further in the code snippet you shared. You will clearly see that I do provide a means to tune in software. This is also detailed in the instructions I provided. I...
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    [posted] (yet another) MIDI to CV Converter!

    I'm sure this project has been done countless time, but this one is mine, and comes in a nifty 3D printed case!

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    It's a multi-channel USB MIDI to CV converter based on the Teensy 2.0, the...
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