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summer near over
1 year ago
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  1. limit switches, also EStop switches (emergency) should
  2. always activate low, idle high. it must idle high, because
  3. consider what would happen if it idles low, then the wire
  4. gets inadvertedly disconnected. you wouldn't notice it. 
  5. BUT, you can also just put all estops on an actual hardware
  6. disconnect for best practice. At the risk of frying some 
  7. not robust chips (tradeoff). Though the note for limit switches
  8. remains correct.