Author Topic: PART 2: Module Connection box. Design  (Read 419 times)

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Offline RJSVTopic starter

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PART 2: Module Connection box. Design
« on: July 19, 2020, 05:02:21 pm »
Using five salvaged toy circuit boards, there are lots of built-in functions, plus several audio sources.
  The key to keeping separate outputs from conflicting is to keep a stationary output BUS, while having selectors on the input portions. Proto-strip power runs
are useful for a central BUS of 8 lines.
  So each 'channel' circuit can be dialed to select amoung signals but without accidently connecting two outputs.  Five rotary selectors will configure the desired layout. An audio selector feeds an internal speaker.
  Viewing the box, it has a nylon shell cover.  Upper corner has the expansion BUS line, with binding posts. Then, moving left to right are housed an LED Garage Light / Motion Detector, a pair of toggle latches, a toy singing and gesturing BIRD, and on the right side of box is a Barking DOG.  You can view the little processor circuit board and speaker salvaged, in the second picture.
  Each channel input is assumed to trigger on a low-going pulse or small signal.
 


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