Attached is a circuit for a tap tempo pedal with LED which lights when the DPDT is depressed. The tap seems to work with my delay. My question is two-fold: 1) as you can tell from my diagram, I am new at this and am wondering if I am missing something. The resistor I am using with the LED is 470 ohm to keep the LED really bright. Is that too low a value? Do I need a stereo jack for shorting out the DC jack? (the diagram shows a battery, but I will be using a DC jack.) Any other problems you all see with the circuit? 2) when I plug this into my delay pedal, it seems to work, but I haven't used it for any length of time as I am worried that this circuit might be feeding voltage into my delay pedal (the Fishman Aura Delay - I play a lot of acoustic). Is this the case, and or is this a problem? Thank you all for your help!