Hi
Is this possible? I was given to understand that it might be possible to do with a transistor or a MOSFET?
I really don’t want the faff of wiring up a relay and the transistor to control it if I can avoid it - I would really much rather just control the LED (for this is an LED I am trying to switch) as directly from a spark pin as I can.
Would a 2N2222 transistor be my friend?
thanks!
2N2222A seems fine with Ic @ 1.0A
Or consider an LED driver perhaps?
Sure, You should be able to use a NPN transistor for low side switching or a PNP transistor for high-side switching.
[Edit] I really like this java circuit simulator. It makes checking questions like these a breeze!
Link to circuit: link. Link to simulator alone: link
Side question ; are you sure your led is 12v?
LEDs are diodes, they have a voltage drop. There really isn’t such a thing as a “5V LED” or “12V LED”. As long as you appropriately limit the current through an LED you can essentially hook them up to any voltage source
My whole life (study so far? Haha) was a lie!
Jokes aside, I didn’t know that. Thanks!
Glad I could help. Electronics are confusing; I’ll admit that right away. I’ve really enjoyed this book: Practical Electronics for Inventors. I was recommended it by one of my ECE friend and now I highly recommend it.
I will try to get a hold of that, looks nice!
I bought the book - it is amazing - but incredibly dense in terms of theory/formulae. I guess I have some basic reading to do first before tackling this book.
Yes, it’s quite detailed and formula heavy but I think it does a good intro job as well. Good luck. Glad you like it