In SX Microcontrollers, SX/B Compiler and SX-Key Tool, beazleybub wrote:

Yeah, it's like the guy who went to RadioShack and asked the sales person if they had canned smoke.
When the salesperson asked, "What in the world do you need canned smoke for?" the man replied, I was working on a electronics kit you sold me earlier and when I powered it up the smoke escaped.

 

I used NPN transistors as a switch to supply power for some relays in a previous project and hoped that I could use them again for my current application because I have a wide variety of NPN and PNP on hand.

 

I do however appreciate the fact that an opto-coupler is pretty much fail safe when it comes to using voltages capable of euthanizing my stamp.

 

Thank you everyone for the suggestions!

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