Fuse block LED's

haha cat-5, i use that stuff all the time for things, cat-5 would work just fine, although you only get 8 wires, but that no big deal.

Parts for fig. 3 diagram:

Q1 - 2N3906, PNP general purpose transistor (last time i saw these at radio shack they were in a package of 15 i think for like $2) very common transistor.

R3, R4 - 4.7 K Ohm resistor, Just get 1/4 watt, 5% or 10% tolerance, doent really matter that much, i think radio shack sells these in packages of 5 for like $0.50

R5 - 560 Ohm, same 1/4 W...

LED - well the circuit is designed for a 2V drop 20 mA LED, i would reccomend a dual color common cathode RED / green LED, just because it will look cooler. I have no idea if radio shack would sell these...?

I would also get a piece of perfboard, with the copper doughnuts, if you can solder.

Oh i thought of the second diagram, then as i was drawing it thought of the 3rd, then the first, then the last 2 haha, i actually had another too, but it ended up being too many parts to make it useful.

Let me know how it goes.

for the perf-board, if you think a different kind will make it easier go for it, im used to the stuff wit just the donuts.

If they dont have 560 i would go for 620 or 680 first, if they dont have that then go for 470, or you could get twice as many of 300 Ohms and put 2 in series for 600 ohms...

Dual color LEDs (RED / green) are very common you shouldnt have much trouble getting some.

resistors dont have polarity so just put then in anyway you want.

No thank you, nobody ever builds these circuits I draw up, im just glad someone is, maybe ill jam the parts in some perfboard and take a picture for you if you want, the way i think it would be easiest to do, it doesnt really matter though.

I assume you will but i would build just one and try it out to make sure it all works correctly before making them all, you can just touch the fuse wire to 12V to see if the LED changes...

Good Luck, ohh do they still sell the 2N3906 transistor in like packs of 15?

wel if thats all they have go with the 470. the transistor has to go in a special way,like so:

if you look at the transistor notice the one side is flat and the other is rounded, the view above would be looking directly down on the circuit from above, I also labeled the emitter, base, and collector (the three terminals of the transistor).

If you want the pin layout in a 3-D view check out the datasheet for the transistor: http://www.fairchildsemi.com/ds/2N/2N3906.pdf

here is the layout i did, its less helpful thta i thought it would be, i didnt solder anything.

Although if its the first time you build something on a board i would recommend not trying to jam everything in a small area, space it out a little and color code wires, i used blue for ground, red for constant power, and green for the fuse terminal.

Let me know how it goes, good luck.

Wow, first person to build a circuit i drew up hah.Yea take a picture when you are done i would love to see it. Other ideas, i have plenty what else do you have in mind? I have a small circuit here that will use a momentary switch to toggle a relay on and off and change LED from red to green and back and such, nice for fog lights and other things that usually require a toggle switch, thats one i remember because i just built it, a little more complicated than this but nothing you can't handle

I think most people are turned off when they see the diagrams, it wasn't that hard was it?