First mod: Fallout server...

[THRASHER2]

[crazybillybob]

Your going to want to put some debounce on those switches. Simplest way would be a capacitor/resistor combo.... Do a google search for examples.



CrazyBillyBob

[odog87]

Your going to want to put some debounce on those switches. Simplest way would be a capacitor/resistor combo.... Do a google search for examples.



CrazyBillyBob

Thanks I did some looking and also found out I had selected the wrong transistor, I needed a PnP type the one in the schematic is a NPN type.

[odog87]

I looked up debouncing, Do I really need to consider that? This circuit is designed to replace a mechanical switch that surely has some electrical bounce when it is closed. Or is it to protect the transistor that is actually doing the switching?

I'm not questioning your judgment, I just simply don't know a lot about electronics and I am just trying to learn as much as I can so if I do something else later I would actually understand the concept rather than merely copy the work of others

Thanks.

In any case I think I came up with what you were talking about, the plans I found included a diode, to ensure that the signal is 0.

Did I get it right?

[mtekk]

I think what he is getting at about the debouncing is that your capacitive touch sensor may "bounce" more than a normal switch if its sensitivity is too high. The motherboard will only have to ability to ignore a certain amount of bounciness.

Also, look on your motherboard header where you plug in the power/hdd LEDs and the switches, there may be a +5VDC standby pin in that block (I know most motherboards that are built by intel have this, and some other manufactures include this as well), may make life easier than directly connecting to the purple +5VDC standby wire.

[odog87]

Ok here it is, a working on/off touch sensor switch. I know it doesn't look good, but it functions

If any one knows where I can actually get a PCB made for this that would be great. I even have designs for the board, using eagle (which will no doubt need some editing).

I have one problem left and that is because of the normal "on" state for the sensor input, and the capacitor's delay, the machine turns on when the power plug is first plugged in, but then you can turn it off and on at will afterward. So if you loose power with it, it will turn on automatically...

Test computer...

All you have to do is puta finger within a 1/8th inch from the surface of the sensor to work (the four circles at the bottom of the image is the sensor).

[odog87]

Well it certainly has been a while...

I am sorry about the delay in updates, unemployment tends to get in the way of projects

At any rate, I went with out a job for a few months, traveled to California, worked for a while, traveled to Texas, didn't work for a while, and now I am in Alabama... working for a while...

But at least this job has allowed me to put money back into my projects. The body of the case is done! I still have to do the electronics but at least it looks like a 'classic' super computer now.

The three holes in the front are for the dials I have talked about in previous posts, and the hole in the side panel is for the controls (power, usb ports, lid controls...). You may not be able to tell but the lid has actuators installed under it so I can raise and lower the lid at will (I want to put a record player in it).

[SXRguyinMA]

cool! glad to see you're back at this!