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All SIDFB Modules Completed!



We finally finished soldering the SIDFB module boards! Each board contains two SIDs and their shift registers; a CD4052-based digitally-controlled filter capacitor switching circuit, 4 pairs capacitors per SID; LM1973-based digitally-controlled audio attenuators controlling feedback to self, feedback to other SID on the board, feedback to SID on next board, external audio output, and master L and R outputs; and the mixer circuit for all the feedback inputs (and external input) to each SID. The boards are custom-manufactured.

The total across all four boards: eighty ICs, 248 resistors, 224 capacitors, 24 transistors, and sixty connectors, for a total of 2600 soldered holes!

From the album:

MIDIbox ASIDITY

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Photo Information

  • Taken with Canon Canon PowerShot SD1200 IS
  • Focal Length 11.6 mm
  • Exposure Time 1/13
  • f Aperture f/4.0
  • ISO Speed 400

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