Power drill trigger circuit - on/off

[BeyondEvil]

tl;dr Can I make a power drill trigger behave like an on/off switch? How?


So, I'm DIYing myself a Sun Gun (links at the bottom). And for that I'm using a cordless drill without the motor.

Now, since it's going to power a 12V, 50W halogen bulb, I don't want or need the trigger to be variable. I just want on/off action.

I found this old thread, but I didn't want to resurrect it:

//www.diynot.com/diy/threads/wiring-of-trigger-circuit-for-cordless-drill.259590/

Been a long time since I studied and/or worked in EE, but if I'm interpreting that schematic and the explanations that go along it correctly, if I simply remove the MOSFET I'll get what I'm after.

Is this correct? What are the possible ramifications of doing so?

Pictures of the trigger:

The MOSFET is a: KIA65N06

Sun Gun:
http://www.polishedbliss.co.uk/acatalog/3m-sun-gun.html

DIY guide:
http://www.zpost.com/forums/showthread.php?t=654637

 

[Nozzle]

I'd butcher the casing instead and fit a proper on/off toggle switch. Take a look at Maplin for the types you could use.

Nozzle

 

[BeyondEvil]

Thanks, that's the second time I got that advice.

So, I figured if I'm going to replace the trigger anyways, I may as well test my theory.

And it was indeed like I thought, removing the MOSFET turned the trigger into an on/off trigger.