Intro to Transistors

129

02:22:23

This is a circuit on my homework. We were doing these on bread boards, since I don't have a bread board at home I'm doing it here. However, it doesn't seem to work. My directions are as follows:

Disconnect the 6v end of the resistor, and attach it to ground.  What happens to the bulb as you switch the resistor from 6v to ground? 

I have no current in this configuration, can someone please help me? 

published 10 years ago

Addramyrz

10 years ago

Ground all negative ends / or loop them all together with 1 ground.

Addramyrz

10 years ago

. - EveryCircuit http://everycircuit.com/circuit/6035099133935616

Sine_eyed

10 years ago

Lol, "no current flow" is the answer to this homework problem, not the question. Do like the other guy said and ground the negative ends of both DC sources. Then, if I were you I would add a SPST switch in series with the Base Resistor, and that lowest DC source..

x35m95

10 years ago

Once you ground everything you might want to turn the lamp into 100 mv

dekelley1

10 years ago

Thanks for you help. I missed the grounds, I'm having a hard time translating from a breadboard to a schematic like this. Before I removed the 6v end of the resister and connected it to ground I had current flowing through the light bulb. After connecting the 6v end of the resistor to ground, I have no current. Correct me if I'm wrong, but is that because I have no current running through the base to the emitter?

dekelley1

10 years ago

@x35m95 how did you figure out my lamp needed to be 100mv?

x35m95

10 years ago

The schematic tells you all you need to do is adjust the lamps voltage until it turns on

x35m95

10 years ago

Disconnect the negative from the resistor after that hook up the possitive from the battery on the left to it.

Addramyrz

10 years ago

Yes. The correct answer is what that other guy said. <3's@Sine_eyed. P.S.: ( where do you live country wise. I took the liberty of making multiple raids on our local RadioShack as this particular one closed after bankruptcy ) I have a few extra taking up what I would only assume could be useful space...etc

x35m95

10 years ago

To who ar3 you talking Addramyrz?

x35m95

10 years ago

Works 👍

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.