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pipeorgan

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  • Birthday 01/01/1

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  1. For Sale: Two (AV Showtech) DOUT Kits (new/unopened). $22. + $2 shipping/handling to anywhere in USA. May consider offer. Can be paid by PayPal.
  2. Yes the ULN's will do fine, its the traces on the DOUT board from the ULN2803 output to the output header that concerns me (only when using ULN2803's) as they have to carry the load of an electo-maganet. On various pipe organ driver boards that incorporate ULN2803's, the traces and ground are beefed up. Pipe valve example: http://www.petersonemp.com/products/pdf/Seriesii.pdf (pdf) Thanks.
  3. More SD Midi Controller links... http://www.lehmayr.de/e_mrmidi.htm (english) http://www.sdmidicontroller.com/self-assembly-pcb-kit/default.htm (Kit)
  4. In using the R4 DOUT with ULN2803's as driver boards, how much load can the board support from the ULN2803's to the output headers? Typical pipe organ valve magnets range from 90 to 50 ohms. The common ground supports multiple valves on (up to eight) all on at once. Are the output traces designed to handle this?
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