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I have two active low outputs, each with a 12V potential when opened. I'd like to create a circuit where, after the a switch to the first input is grounded, there is a small delay (>= 500ms) and then the second output is grounded.

I feel like this should be possible with an RC circuit and a transistor, but my design skills are severely limited. I have already tried such a circuit, wired as shown: transistor circuit with RC time delay

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  • \$\begingroup\$ (1) your switch will short the 12v (2) other than shorting your supply, wouldn't output 1 just stay at 12V the whole time? (3) there would have to be a resistor between 12V and output 1 (4) this still wouldn't fix output 2, see Andy's answer \$\endgroup\$
    – Pete W
    Jan 13 at 16:46
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The problem with your circuit is that it would need an extra resistor: -

enter image description here

If you can't fit that resistor then you need to think of a different way.

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