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Projects => Tech Help - Projects Page => Topic started by: Dawnofzion on October 04, 2016, 08:05:32 PM

Title: Super fuzz tone switch help
Post by: Dawnofzion on October 04, 2016, 08:05:32 PM
I'm looking to do a Univox Superfuzz clone.  I have the Pcb etched and ready.  I want to do a slight modification to the tone switch. Instead of a simple toggle switch,  I want to do a foot switch that has a dual color LED that will change colors between tones that are selected with the switch.  I'm not sure how to do this....any ideas? What type of footswitch (2dpt?) is needed and how would this be wired up?  Any input is appreciated.


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Title: Re: Super fuzz tone switch help
Post by: Jebus on October 05, 2016, 01:41:35 AM
If the original switch is SPDT then DPDT gets the job done. Use the extra row for the leds like this: http://i.stack.imgur.com/qkf9a.png

Adjust the resistors so that the leds are similar in brightness.

Post a schematic if you need more precise help. :)

Edit. Forget the latching switch on the picture.
Title: Re: Super fuzz tone switch help
Post by: Dawnofzion on September 12, 2017, 10:39:06 PM
I am finally getting around to finishing this pedal and still have questions about the dpdt switch for bicolor LED.

See the image below for switch.  The two green wires are the two in and out from the board.  The black is a ground wire.
Do I use the second set of poles on the right for the led? Using the center post as the ground? How would this LED get power?

(https://uploads.tapatalk-cdn.com/20170913/15e84c09621165c07661faa3866fcc4f.jpg)
Title: Re: Super fuzz tone switch help
Post by: Dawnofzion on September 17, 2017, 10:47:13 PM
Can anyone help on how to get the bicolor led wired up correctly?


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Title: Re: Super fuzz tone switch help
Post by: jkokura on September 18, 2017, 09:37:04 AM
Wiring depends entirely on your bi colour. Is it common anode or cathode?

Jacob
Title: Re: Super fuzz tone switch help
Post by: WormBoy on September 19, 2017, 09:50:31 AM
As Jacob said, it depends on the type of LED. Also depends on your preferences. There's a number of different ways you can wire them up, with one resistor or two (to match the brightness of the two colors to your liking, as Jebus proposed, although that scheme was for two LEDs). The common leg of the LED will be tied to either ground or 9V (depending on your LED), and current will always need to run through a CLR, which can be on either side of the LED. One option is shown over here: http://www.muzique.com/news/images/bicolor2.gif (http://www.muzique.com/news/images/bicolor2.gif), but there are different options as well (you can connect 9V to the middle pole of the switch and put the resistor between LED and ground, etc.). First you have to find out what LED you have  ;).