#118 Building the PWM v2, part 4 of 5

[brandon14872]

because the housing is metal wouldn't the circuit short-circuit?

[zipstorcrtx]

Okay Z, I'm confused.. Do we need C7 or not. It appears on the diagram but does not on the video... Also there is a grey area on the top right corner of the layout pic, this is confusing too.. can you explain this please? Thanks for your work, this is great, well mostly, I cant find the artwork for PCB etching.. Help help!

[ruralmississippian]

Seeing the hole beside the red + 12v connector one would suspect it was/is for the black - connector shown in an earlier video however you sign and seal the box with that hole open and unoccupied. What is the intended use of that hole?

[ZeroFossilFuel]

That hole was an "Ooops". Didn't need the extra terminal.

[BikoHatna]

Z! You didn't explain the .003 R12...

That is one of your great ideas ya know!

Or did I miss it?

[ZeroFossilFuel]

Please read the circuit description at

dub-dub-dub dot alt-nrg*org

[elvisorme]

can you plz tell me why make a Pulse-width modulator? what are you going to use it for? do i really need one for my fuel injected car? i am going to be using a map sensor

[ZeroFossilFuel]

Please read the intro and circuit description at

dub-dub-dub dot alt-nrg*org

[BikoHatna]

Ahhhh.....Nice!

pictures are so clear!

the text is thorough!

Man, how do you get so much done so quick?

It's going to be next week before I can get my HHometer? done!

[delvis11]

i wish you would have shown use electronic newbee's how to wire the mosfet. just a little confused on that part.

[ZeroFossilFuel]

MOSFET wiring is on the data sheet supplied with the devices and online.

[ZeroFossilFuel]

Also in great detail in the photos posted at the web site.