simple circuit issue

  1. Help activating a solenoid via a capacitor when power is cut

    The goal is to create a circuit that activates a solenoid when the supply power is cut, using power stored in a capacitor. So far the issue I have been running into is that the relay is energized by the capacitor when power is cut, and the solenoid on NC remains stationary. If the ground for the...
  2. T

    Simple circuit issue

    Hi, I need the LED to light up every time the "connecting circuit'" is connected to the main power supply. In option A the LED would never turn off and in option B the LED causes a voltage drop over the pogo pin connectors. Option B causes the voltage to drop from 5V to 2.66V, which is too...
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