How Do I make the Blast door from the Doom 3 project ?

[Wannabeamodder]

Thanks man here is the link for the bi directional dc motor controller.
http://www.hobbyengineering.com/H1742.html


Be aware this is an un-assembled kit.
For those of you who have not assembled anything like this before, here are some tips.

The main things to know is identification of resitors by the color bands.
Also keep in mind resitors can be inserted either way but diodes and electrolitic capacitors cannot (it's the big black capacitor) be sure to get your positive and negative poles aligned correctly. The circuit board shows you wich way to place the diodes there is a black or grey band on one end of the diode this is represented by a white band on the pcb just orient the diodes in that direction.
Also be sure to identify the MOSFETS there are four two of each kind they must be positioned one each on each side of the heatsinks.

If you already know how to solder you shouldn't have any problems.

For anyone who wants to build this I recommend:

A good soldering iron with some degree of heat control
A lamp with magnifier in the center
Small gauge solder and desoldering tape.

If you need any further help just ask.



Here is the video I promised in the previous post.
http://video.google.com/videoplay?do...31123562461186

Charles

[jdbnsn]

Haha, that is awesome!

I featured your blast door and linked to your you-tube vid on the front page, great work modder!

[DaveW]

I'd like to point out to everyone that this is a great example of good worklog practice. Big, clear photos, handy links, good explanations, the whole lot. +Rep dude.

-Dave

[Wannabeamodder]

I went from thinking this topic was dead to this!
Thanks a million guys!

Charles

[Spacehonkey]

Just watched the video. Great work +Rep for proving that we to can follow in the foots of a modding god.:p

[Crimson Sky]

HELL OF A JOB! I can't believe someone besides "Old Man Crimson" pulled this off. Mind if I ask, where did you pick up that DC controller?

It's a hella thing when you learn from the master Great job on the box, man.

[Wannabeamodder]

Here is a video of the assemled unit installed in the case.
http://video.google.com/videoplay?do...38287951384478

The only thing I need to work on is the ker-thunk it makes when closing some foam padding should help that.

I figured I had better post this as I am being upstaged by my son check out his new thread here

Charles

[Wannabeamodder]

Ok guys I have one issue with the by-directional dc motor controller it's the pot!
After raising or lowering the door it must be returned to the neutral or off position or else the motor is still on I have solved this by wireing up a toggle switch to turn the power to it on and off but this looks clunky to have to flip a switch, turn the pot then flip the switch again.
I have looked at a push button SPDT Pot does anyone know if that would work? Also they had a SPST one which do I need?

Thanks as always for all the help I have recieved and all the nice comments.

Charles

[Mach]

What about a return spring arrangement?

Like this

[DaveW]

Personally I would do this with a PIC micro controller and some sensors.

But, PIC Microcontrollers are my answer to everything. If you ever want a hand with making one, i'll gladly assist, but my schedule is packed for the next 2 months, so you might also want to PM CrazyBillyBob, who is another guy about here who knows a good thing or two about PICs.

If PIC's are a bit confusing, you can actually program them in C and convert it to Assembler. There's also a thing called the BASIC Stamp, which is very, very easy to learn but very limited in what it can do compared to the PIC.

Look em up on Wikipedia: they might make your door that bit more interesting. All you'd have to replace is your sensors, the motors etc. will essentially remain the same.