LED's AND recycling parts

Started by gliptitude, March 05, 2005, 09:47:41 PM

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gliptitude

i have been trying to build the hornet pedal for a while. it is my first stompbox project and also my first electronics project. i never found the right transistors but i got some substitutes that people on the forum said would work ok in the meantime. i put everything together and it didn't seem to work. (i did not have a guitar handy to test, but the LED didn't light up, though i have already (and since) made it light up on its own with just the battery and a resistor.) i got discouraged, took it apart and set it aside for a while. ...now i am getting ready to work on it again.

:shock: here are my questions. there are two of them.

:shock: 1. i got a crybaby pedal that must be broken b/c i found it in the trash. does anyone know if this has some useful parts i can salvage for the hornet pedal?
    -i don't know if there are different types of crybabies, but this one says it is an "amplifier".
    -i would like to use the crybaby foot switch instead of my dpdt toggle switch. but it only has 3 prongs. also it does not give much mechanical resistance or "feel" like it is switching when i press it.  ????
    -there are a bunch of resistors and a great big 100k potentiometer and some capacitors that i don't really need. but there is also an AC (or DC?)jack and some transistors which are very hard to identify. three transistors are the very small type shaped like half of a cylander and one component i can't identify is a black cylander the size of a stack of 8 dimes, with 4 prongs. one of the little transistors is labeled "712 MPS A13". the other two are labeled "718 MPS A18". both types also have a character resembling an "N" at the beginning of the label.
    -it has two curious looking phone jacks. they are encased with plasic and have six prongs each. each has three metal bands over the top which lead to the prongs on either side.

:shock: 2. i have made a number of inquiries about adding an LED indicator and been referred each time to various bypass diagrams. but i am wondering, is this necessary? if i use the switch mentioned above and it is not a dpdt or 3pdt, is it possable to add an LED without a bypass? as long as it lights up when switched on and lights out when switched off, it serves my purpose.

thanks if you read this long post and thanks in an advance for your help!  :)
get it over with

rubberlips

Quotei got a crybaby pedal that must be broken b/c i found it in the trash. does anyone know if this has some useful parts i can salvage for the hornet pedal?
Don't assume it's broken, it may still work.
Personally I'd keep the crybaby and get it working and just buy the parts for the hornet. Re-using parts generally isn't a good idea.. the old saying - you never know where they're been :)
Quotei have made a number of inquiries about adding an LED indicator and been referred each time to various bypass diagrams. but i am wondering, is this necessary?
Yep, it's necessary to get the LED working with only a DPDT switch. Check out RGs site for the millenium bypass, it's probably the easiest to get going

Pete
play it hard, play it LOUD!

guitarmonky55

dont use that spdt switch from the crybaby, its worthless as far as most people are concerned as you cant true bypass your circuit with it.  

keep the crybaby intact, if anything you can make a new board and use alot of the surface mount parts to make a new wah design but it can more than likely be fixed.

Hal

you can use the switch for something like a "mode" switch on an easyvibe - or any component switching you might need, such as input caps, clipping diodes - whatever!

NaBo

the chassis and pot are your mvp's, and if it's got a good, working fasel inductor in there, you're laughing.