[simpits-tech] controling a 28v circuit with a 5v

[Michael Hirczy]

Justin Messenger wrote:
> I am using the Simkits multi-controller and have been playing with the 
> 5v LED outputs. The LEDs are cool, (got the marker lights working last 
> night) but I got to thinking, it would be great to use those signals to 
> toggle my 28v bulbs.  There are a couple of places where LED wont work 
> in my sim.
>  
> But this exposes my lack of electronic knowledge so my question is,
> what would be the simplest way to toggle a 28v DC circuit with a 5v 20mA 
> DC circuit?

I'm using "normal" optocouplers to control my magnetic switches (12V) 
with my LED-controlling MM5451 chip.

greetings
michi