how to add an led to this

[K3vin]

Hi,
im just learning how to build pedals and wanted to to know how to add an led to this
http://www.aronnelson.com/gallery/main.php/v/DRAGONFLY-LAYOUTS_0/album17/album06/DOD_OVERDRIVE_250_VERO_001.gif.html

Thanks,
kevin

[jimmybjj]

use a 3pdt switch instead of the dpdt and use the extra bank of contacts for the led. look up true bypass switching with a 3pdt, that should give you all the info you need.

[petemoore]

  LED with battery lights for split second, burns out.
 LED with current limiting resistor burns less brightly, but for much longer.
 For light emission a power supply is needed.
 9v is too handy, well use that and a 3k3 current limiter.
 The cathode is marked, cross an LED and resistor lead pinch hard [pliers?.. twist them together, apply the LED>R circuit across the battery +/-, if it doesn't light, reverse polarity, remember which pole the lit the LED when the resistor side touched it.
 This is the LED circuit, to switch it off, use an S*PS*T [the simplest switch] to make/break the connection.
 To switch it off when an effect is bypassed, use an '*P' and '*T' which is part of the bypass switch lugs which connect the power supply to the LED circuit when the effect is on [will light LED]. This requires a 3PDT switch if true bypass wiring is needed. Or, see GEO millenium bypass articles for LED indicator w/true bypass with a DPDT switch.

[boogietube]

Use Offboard Wiring 5 in this diagram:

http://www.tonepad.com/getFile.asp?id=76