how difficult to make a footswitch with LED?

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4/16/2003 6:11 AM

PJ

how difficult to make a footswitch with LED? I have a Budda Superdrive 30II combo. The footswitch doesn't have an LED and since the amp has so little noise on the gain channel (this is a good thing!), I sometimes loose track of which channel is selected. Budda will make me a pedal with an LED (and battery to operate it), but will have to charge me for 1/2 hr bench time. My question is how difficult would it be for me to make this myself? I'm pretty handy, but don't have much knowledge with electronics. This should be a very simple thing to make, no? Could someone point me to a schematic for a channel switch with a battery to operate the LED?     Thanks   PJ

 

4/16/2003 3:59 PM
bosephus	there are several ways to achieve this. but, we need some more information to help you out. is it a insgle button footswitch? what exactly does the footswitch, switch? logic level w a momentary switch, or is switching the ground of relays? lots of things we need to know first. laterz!     bosephus

 

4/16/2003 4:50 PM
PJ	It's a single switch that controls channel selection. The switch included with the amp is one of the small round metal switches that is just a stompswitch attatched to a cable with a 1/4 mono plug. I have no idea what the other stuff you said means! Budda says that because of the amp circuit a battery would be required to use and LED on the footswitch.     Thanks

 

4/16/2003 5:54 PM
pef	Do you have the schematic of the swtiching matrix ?   If a DC voltage command a relay you can put a led in serie with the relay coil ( I think ), directly in the footswith box. ( like on mesa B)

 

4/17/2003 5:42 AM
PJ	I did an online search and wasn't able to find a schematic. I guess this is more difficult than I expected and I should just pay Budda for the switch. I was thinking it would just be a "connect the switch, battery and LED like this" type of deal.     Thanks for all the help.

 

4/17/2003 7:42 AM
Enzo	I would be guessing that since the factory said it would need a battery for LEDs that the circuit is not powered. If the footswitch were controlling relays you could just use the relay power. But if the switch just grounds off some logic input, then the LED will have to be powered separately - hence the battery.

 

4/18/2003 5:31 PM

Jack Koochin

PJ,   Sounds like you have a pedal already.... open it up and have a look at the switch that's in there and see how it operates.....     If you're really lucky, it'll be a switch that latches (not "momentary") alternately on, then off each time you push it, and it may have an unused set of contacts on it already. You can use these unused contacts to turn a separate LED circuit on and off. You'll need an ohmmeter to check this out.     Is there room in the pedal for a battery? You'll need one 9V or two AA batteries, a holder for the battery, one resistor, and an LED. If there's room for all this in your existing pedal, you're all set.     Make Sense ? Hope this gives you some ideas.     Jack

 

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