Mil Bypass Q

[BDuguay]

Say I want to install a Mil Bypass in my good ole EH Deluxe Electric Mistress. I'll need to tap power from the board and it puts out 17vdc.
Will this still work? Do I need to worry about the transistor getting blowed up? What sort of current limiting resistor will I need to keep the LED from becoming a DED. Do the forum members prefer wool socks, or gym socks? Am I asking too many questions?

B.

[R.G.]

Say I want to install a Mil Bypass in my good ole EH Deluxe Electric Mistress. I'll need to tap power from the board and it puts out 17vdc.
Will this still work?

Yes, for some values of Millenium Bypass.

Do I need to worry about the transistor getting blowed up?

Yes. Your transistor must be able to sustain at least the 17V. Look at the datasheet for the Vds specs.

What sort of current limiting resistor will I need to keep the LED from becoming a DED.

One that keeps the LED current under its specified maximum, usually 20ma. Before we lapse into a session of pointing to neato whizzo LED resistor calculators, LEARN TO CALCULATE CURRENTS FROM VOLTAGES!!  The supply is 17V. The transistor saturates to a volt or less. The LED needs two volts. That leaves 17-1-2 = 14V for the resistor. You choose the current, then calculate a resistor from ohm's law. If you want 10ma, then R = 14V/10ma, = 1.4K. If you want 20ma, R = 14V/.02 = 2.8K (and use 2.7K, the nearest standard value). If you want 1ma, use 14V/0.001A = 14K.

Do the forum members prefer wool socks, or gym socks?

Topsiders.

Am I asking too many questions?

Yes, but we forgive you. 

[Jaicen_solo]

LEARN TO CALCULATE CURRENTS FROM VOLTAGES!!

R.G, I'm so glad you made this point! I spent two years studying A-Level Physics and some electronics at degree level,  and never once has it occured to me to actually use this knowledge for effects building!
I guess that's the sound of the apple falling...

[goosonique]

Yo RG since i caught on this thread .... nice work on the Workhorse. and thanks heaps for all the effort to make this community rockin .

[BDuguay]

I knew that!
Okay, not really but I did check the data sheet on the transistor(actually, I did this before my post but I wanted to be extra sure) and apparenly it's rated for 25vdc max so, I guess I'm okay.
As for me, wool in the winter(I am a Canadian eh?) and gym in the summer.
Thanks R.G.
I shall endeavour to utilize the formula more in the future.
B.