I would like to have a power switch for the solid state guitar amp I am building, but I would like an LED indicator to know when it is on. I know how to do this using a dpdt on-off, but would it be possible to use an spst and still have the LED?
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\$\begingroup\$ depends on what you are switching. ... is it actual power? or is it some sort of a mute switch? \$\endgroup\$– jsotolaCommented Jan 28, 2018 at 3:09
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\$\begingroup\$ Power, sorry. Not a standby. \$\endgroup\$– JebullCommented Jan 28, 2018 at 3:18
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\$\begingroup\$ Yes. Just run the LED from the power. Power present means LED is on. And conversely. \$\endgroup\$– user57037Commented Jan 28, 2018 at 3:26
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Yes. Put the LED in parallel with your amp:
simulate this circuit – Schematic created using CircuitLab
answered Jan 28, 2018 at 3:45