24V Lift Register Circuit

dedominici

dedominici

Create a schematic circuit for a 24V lift/elevator register line. It needs an external push button that triggers 0V (GND), a status LED, a protection diode (like 1N4148), an RC de-bounce filter network (resistor and capacitor), a logic latch or logic input pin, and a ULN2003 Darlington transistor array driving the same input line to catch and lock the 0V latch state until reset."

flux

No schematic changes were made because the account currently has no available ACUs.
Remaining work:
  • Define the 24 V input protection, 1N4148 clamp, and RC debounce values.
  • Select the latch/logic-input voltage and reset method.
  • Wire the external active-low push button, status LED, and ULN2003 channel so it holds the register line at 0 V until reset.
  • Add supply decoupling and verify voltage/current ratings and connectivity.
Document circuit proposal
Clarify latch requirements
Verify current limits
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