Add an LED, to show fx is on, to Rebote 2 from tonepad

[arma61]

Hi, anybody knows how to wire or where on the pcb connect an LED to show the fx is on, I know how to do it with a 3PDT (9 lugs) , but in this case the fx is already build with a DPDT (6 lugs). thx for help

[WelshWonder]

Research the Millenium bypass. That's the only way to do it with DPDT...

[R.G.]

Just for reference, find the Millenium Bypass at GEO, http://www.geofex.com.

[arma61]

thx to all, I though already at the millenium bypass, but I was thinking to pick up the power for the LED in some point of the pcb that gets power when the fx is switched on, the box is small and, although there's some little space, will be a hard job (at least for me!) to put the MB in there. thx

[Arn C.]

Here is another method used in this schematic with dpdt:

http://www.muzique.com/schem/tubedrvr.gif

Peace!
Arn C.

[arma61]

what about something like this

http://img473.imageshack.us/img473/3045/ledonkp3.jpg

[WelshWonder]

what about something like this

http://img473.imageshack.us/img473/3045/ledonkp3.jpg

There's no switching going on there, at first glance the LED will be lit when you insert a jack not when the effect is on. Go with the Millenium Bypass or try and get a 3PDT switch...good luck.

[arma61]

yep! you're right no switch there! I'll go for the Millenium then,thx all for help

[MikeH]

There's no place on the pcb where you can "tap into" to get power when the effect is on, because in reality the power is on in the effect at all times.  When you switch the effect on, you're just routing the signal in a different way;  It doesn't turn on or off the power to the circuit.  That's why batteries go dead even with the effect is off.

[moosapotamus]

Well, since you are already working on a tonepad project, why not also check out tonepad's very nice article on offboard wiring...

http://tonepad.com/project.asp?id=35

... just pick your flavor. My personal choice for true-bypass with an LED would be version 5.

~ Charlie

[WelshWonder]

These links helped me loads to get a grasp of wiring switches etc...

Switches

Wiring

Power

As moosapotamus stated though, look through the Tonpad's offboard wiring pdf, but back to your original question I'm afraid you ain't going to get away with adding an LED without the Millenium bypass or obtaining 3PDT switch...

[arma61]

thanks to all, I knew about Tonepad offboard wiring, I've used them (thank FP), my request was in order to use a (cheaper?!) 2pdt instead of an (expensive) 3pdt, now I know it's not possible without MB. I though that there was some transistor in the circuit that without signal in is quiet and then its state change when the signal gets in/through, so a sort of switch, but I know very little about electronics anyway.

[d95err]

The input impedance of the Reboote 2 looks fairly high (although I can't calculate it exactly). I don't think you will get any tone sucking if you use a traditional non-true bypass. Just hardwire the bypass signal to the input. Use one pole to switch between effect and bypass at the output. Use the other pole to switch the LED.

Since this is a delay, it will probably go late in the effect chain; definately after buffer-fearing effects like fuzzes or treble boosters. So if you want to you could add a simple FET buffer infront of it just to be really sure there is no tone sucking.

[arma61]

thx d95err, I'll try also this solution and check tone sucking.

Anyway as per my experience and needs I use echo so little that I can stand with a little of tone sucking just playing with my guitar tone knobs.

Do you mean something like this (sorry for bad drawing!)

http://img84.imageshack.us/img84/8697/image7lj7.jpg