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Help with transisitor circuit

R

Ray

Jan 1, 1970
0
I don't know much about electrical circuits beyond Ohm's law, but I have a
project that I would like to solve.

Attached is a schematic involving two circuits and a power transistor.
Basically, circuit "A" is an off-on circuit operating at 12V @ 2 amps. I
would like it to switch circuit "B" off-on which is operating 12V @ 8 amps.
What I need to know is where to connect the + & - terminals of circuits "A"
& "B" to what terminals (B,C, E) on the transistor.

Thanks, in advance.

Ray
 
P

petrus bitbyter

Jan 1, 1970
0
Ray said:
I don't know much about electrical circuits beyond Ohm's law, but I have a
project that I would like to solve.

Attached is a schematic involving two circuits and a power transistor.
Basically, circuit "A" is an off-on circuit operating at 12V @ 2 amps. I
would like it to switch circuit "B" off-on which is operating 12V @ 8
amps. What I need to know is where to connect the + & - terminals of
circuits "A" & "B" to what terminals (B,C, E) on the transistor.

Thanks, in advance.

Ray

This group does not support attachments you yours is lost. Go to
alt.binaries.schematics.electronic
if you want to attach something. Sci.electronics newsgroups often refer to
that group where they place schematics or pictures.

petrus bitbyter
 

neon

Oct 21, 2006
1,325
Joined
Oct 21, 2006
Messages
1,325
There are two types of standard transistors, NPN and PNP, with different circuit symbols. The letters refer to the layers of semiconductor material used to make the transistor. Most transistors used today are NPN because this is the easiest type to make from silicon.

have considered that all logic IC are positive voltage therefore the choice is NPN [NOT EASIER TO MAKE INDEED]
 
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