Crybaby mods ...all good but the light is killing it.

[ian_guga]

decided to mod my crybaby...
"Vocal Mod" - done with pot for fine tune.
true bypass - done
Midrange - done
great sounds and all -
Adding a led - fail.... 
no mater where I steal the 9v and ground from the led just drains the voltage out of the pedal until it dies. unplugging the led turns things back to normal 
what...is going on here? am I missing something?

[luks999]

where are you connecting your LEDs supply voltage?
i did something similar to my VOX wah and i soldered a 2k2 resistor directly to 9V and then to the 3PDT

also: are you using adapter or a battery?

[copachino]

decided to mod my crybaby...
"Vocal Mod" - done with pot for fine tune.
true bypass - done
Midrange - done
great sounds and all -
Adding a led - fail.... 
no mater where I steal the 9v and ground from the led just drains the voltage out of the pedal until it dies. unplugging the led turns things back to normal 
what...is going on here? am I missing something?

no matter where you take the voltage, usea a current limiter resistor or you will be burning leds forever

[ian_guga]

thanks guys.... same thing happens both on battery and psu... at the start I tried taking the 9v and ground from the popular location - the diode and the resistor right after the pcu, then I just started experiment all over the place and same thing happens everywhere.
the led resistor is not forgotten.

[copachino]

thanks guys.... same thing happens both on battery and psu... at the start I tried taking the 9v and ground from the popular location - the diode and the resistor right after the pcu, then I just started experiment all over the place and same thing happens everywhere.
the led resistor is not forgotten.

can you show a picture??

[ian_guga]

i'll take some pics of it ...
true bypass is wired like this


basically the moment the led gets turned on the volume drops gradually to 0 and if I just unplug the led vol gets back to normal again gradually.

[ian_guga]

some new development...
the problem seams to be disappeared - could not pinpoint at what point and why....
at the moment the led causes a small drop in volume and change in tone which I guess could be expected,
it also causes the biggest led pop on pressing the switch I've ever heard in my life. sounds almost like a gun shot on cranked up amp. 

[davent]

From your drawing it looks like you're using the switch for the positive supply to the LED, have you tried switching the ground connection instead?
dave

[ian_guga]

I haven't .... do you mean for it to solve the volume drop problem or the pop.
I am trying at the moment to get rid of the pop by putting 10mf cap to ground
it reduces the pop by much - it's now in the "normal" led pop volumes

[ian_guga]

mastery solved - faulty capacitor the .01uf was causing all the madness possible including the led-pop and the vol drop.

now fixed -  added "volume" mod and now sounds really good.