I'm total noob pleasehelp (transistor)

i get 0.01 volt output, without transistor i get 1 volt. images coming 1 min.

images.

birkomester: i get 0.01 volt output, without transistor i get 1 volt.

We need a lot more information than that.

What are you trying to do? How have you wired it up? Pictures are of little use we need schematics. What code are you using to test this? Where are you measuring to get those voltages? It makes little sense.

Grumpy_Mike:

birkomester: i get 0.01 volt output, without transistor i get 1 volt.

We need a lot more information than that.

What are you trying to do? How have you wired it up? Pictures are of little use we need schematics. What code are you using to test this? Where are you measuring to get those voltages? It makes little sense.

Im trying to amplify. I cant draw schematics. Arudino pin 9-> transsitor base transistor emitter ->usb car charger positive transistor collector car charger negative -> ground. I am measuring the voltage in the USB cable.

Learn to draw schematics. It isn’t that difficult.

Trying to amplify what?

Why are you using a car charger? What are you trying to accomplish?

I cant draw schematics.

Why not. Pencil and paper is good then post a picture of it. http://blog.makezine.com/archive/2011/01/reading-circuit-diagrams.html

When I was at school I had a metal work teacher who always told us. "If you can't draw it you can't make it" This is even more true with electronics.

Arudino pin 9-> transsitor base transistor emitter ->usb car charger positive transistor collector car charger negative -> ground.

Totally wrong. But I can't tell you what is right because I don't know what you want to do. What sort of transistor are you using PNP or NPN?

Im trying to amplify

Transistors do not amplify they switch. You can never get more voltage out of a transistor than the power supply rail you put into it.

Now what are you trying to do really. This looks like an XY problem http://xyproblem.info/

I have to agree with Grumpy_Mike that you haven't clarified anything. What I can figure out what you are trying to say is that your amplifying some signal. You can amplify signals with a transistor but op amps would be much easier.

Looking at that blog post on Make Magazine's site, I have to say that I have been very disappointed in the way they publish schematics.

This one is half pictorial:

This one is horribly confusing:

This one has only one Vcc and one Ground connection, and a mess of interwoven wires:

All miss the point of a good schematic diagram - make the circuit clearer and easier to understand.

Here is some good advice on drawing schematic diagrams:

http://opencircuitdesign.com/xcircuit/goodschem/goodschem.html

http://electronics.stackexchange.com/questions/28251/rules-and-guidelines-for-drawing-good-schematics

http://www.allaboutcircuits.com/vol_1/chpt_7/3.html

Your schematic should NOT look like this:

Because it isn't clear that the polarity of the electric eel is incorrect. :P

Have to get me one a them triple-sixes