Transistor switching larger voltages?

ArtemisGoldfish

Member

• Jan 7, 2007

• #1

Alright, since I'm still a complete electronics newbie, I need to know if there's any super-easy way to make a smaller voltage (Say...From a microcontroller pin output) control a larger voltage through an NPN transistor. Probably pretty simple for someone with alittle more knowledge, so just enlighten me.

 

K

kchriste

New Member

Forum Supporter

• Jan 7, 2007

• #2

For low voltage DC (say 5-40V) see this page:

 

ArtemisGoldfish

Member

• Jan 7, 2007

• #3

Thanks much, and don't worry, I know that larger voltages and AC are handled by relays.

 

Sceadwian

Banned

• Jan 7, 2007

• #4

Not really Artemis.. Solid state power electronics have come a long way in recent years. Excluding actual full scale power transfer lines solid state electronics can do everything a relay can and more.

 

ArtemisGoldfish

Member

• Jan 7, 2007

• #5

Sceadwian said:

Not really Artemis.. Solid state power electronics have come a long way in recent years. Excluding actual full scale power transfer lines solid state electronics can do everything a relay can and more.

Click to expand...

Well, in general, one would probably want to use relays for large voltages and AC. Even though some of the newer solid-state stuff could do it, I'd rather use the slightly older method.

 

dknguyen

Well-Known Member

Most Helpful Member

• Jan 7, 2007

• #6

Except for switching applications, right?

 

Sceadwian

Banned

• Jan 7, 2007

• #7

SCR's and triacs make solid state AC switching old hat for even 208 lines with multiple amps. They can be used in pulse aplications up to several thousand amps.