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Current draw too high for Phantom Supply #13

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Cirromulus opened this issue Jan 19, 2023 · 0 comments
Open

Current draw too high for Phantom Supply #13

Cirromulus opened this issue Jan 19, 2023 · 0 comments

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@Cirromulus
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High draw of Optocoupler is too much.
Even with R_phantom at 1kOhm, supply from Mixing Console is not enough.

Solutions:

  • Use more expensive, but less power-hungry Optocoupler NSL-32SR3
  • Switch to virtual Ground supply (with, perhaps, Opamp ADA4099-1BUJZ-RL7) and directly use Digipot (which then has to be higher resistance and logarithmic)
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@Cirromulus