Hi. I don't know much about electronics so I have a question. I am making an amp foot switch for a guitar amplifier. The current switch I have has a 5mm red LED and a resistor. The voltage coming from the amp on the tip of a tip/sleeve 1/4 inch cable is 9.62 volts. I have purchased the appropriate resistor for a Super Ultra-Bright LED. I am making a custom pedal that also switches between two FX pedal loops at the same time as the amp is switched between channels.
So the problem is this. I don't want to take apart the old foot switch circuit if I don't have to, but using a DMM across the resistor gives me zero ohms for some reason (?), and I don't know why. The foot switch still works. So if I put a LED and a resistor in series to run them at 9.6 volts (I used an online resistor calculator), doesn't the amp need some voltage, to say hold a relay open? I could make the connection using the 9.6 volts without the LED and have the loop LEDs display the channel I'm on, but I am worried that if it is , say a 5 volt relay with the current LED setup, that I may burn out the relay.
My only options if I can't figure this out (with your help of course) is to use the LED from the old foot switch.
So my question is, without wiring it up to a LED with a resistor, is there any way of figuring out if the relay or whatever needs current., or will a zero volt continuity circuit switch the channels, after the voltage has dropped through the resistor and LED. Much thanks in advance, Roadtrip
So the problem is this. I don't want to take apart the old foot switch circuit if I don't have to, but using a DMM across the resistor gives me zero ohms for some reason (?), and I don't know why. The foot switch still works. So if I put a LED and a resistor in series to run them at 9.6 volts (I used an online resistor calculator), doesn't the amp need some voltage, to say hold a relay open? I could make the connection using the 9.6 volts without the LED and have the loop LEDs display the channel I'm on, but I am worried that if it is , say a 5 volt relay with the current LED setup, that I may burn out the relay.
My only options if I can't figure this out (with your help of course) is to use the LED from the old foot switch.
So my question is, without wiring it up to a LED with a resistor, is there any way of figuring out if the relay or whatever needs current., or will a zero volt continuity circuit switch the channels, after the voltage has dropped through the resistor and LED. Much thanks in advance, Roadtrip