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  1. Changing a continuous electrical signal to a pulse?

    Electrical
    How do I convert a continuous electrical signal to a pulse? I use a door bell as an entry chime for my retail store. Each time the door is opened is like someone ringing a doorbell (Ding Dong). My problem is that if someone holds the door open for deliveries, the one more thing conversation...
  2. Using AC, fan never turns off

    HVAC
    Hi All, My Trane system (with 19i compressor outside) has a T803A thermostat. I have the FAN set to AUTO. When running the AC and the desired room temperature is reached, the fan continues to blow....never turning off...blowing at 100% speed. If I raise the SET TO temperature up one degree...
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