I had it saved somewhere - but I can't seem to find it. To keep my next case looking uniform I was planning on using vandal switches for everything. So basic question - anyone know a guide to making the circuit to use a momentary for turning on/off things such as CCFL's? I can't seem to remember the work around to using them without that dreaded issue of pushing the button and it having a 50% chance of turning itself back on/off.

Bonus points if can find one or tell me how to use a momentary to clear CMOS. Where when depressed it'll open a normally closed leg and close a open.

Easy straightforward way is to use a relay energized by the switch:

AutoSpeed - Using Relays

Quote: Originally Posted by joecoin Easy straightforward way is to use a relay energized by the switch: AutoSpeed - Using Relays

I was thinking flip-flop circuits. Only way I know to use relays for what I'm talking about is a min. of 3 relays which gets rather large when I'm needing 5 of these puppies to function as SPST. 15 relays in a SFF is a bitch much.

ADD: Found the circuit after digging through bit-tech. If anyone is wondering...

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That should work, that MOSFET can take 16 amps.

Forgot you had a SFF case. However, ther are some mighty tiny relays out these days.

If you really want to get small and cut your component count down then one way to do what you want would be by using a PIC or some other microcontroller...

something from the 16F*** family would be ideal.

All it would take would be a few lines of C code and some free software and job done.

connect the switches to some input pins, have the output pins connected to the 'Gate' leg of a transistor and job done. Bit more complex i suppose but far more elegant... not to mention the cool stuff you could then get it to do! lol


Mark

I've having one helluva time trying to find a security (looks like a anti-vandal, just can't take as much force) switch that's momentary combined NO/NC from anyone that doesn't have 500 dollar min orders. Anyone know of a supplier I should check out? I'm basicly tryin' to keep all my switches the same low profile style.

I found one place so far, but they want 90 dollars for it.... I'm hoping there's something out there in the sub-40 range.

Quote: Originally Posted by Iateronmly I've having one helluva time trying to find a security (looks like a anti-vandal, just can't take massive electric charges) switch that's momentary combined NO/NC from anyone that doesn't have 500 dollar min orders. Anyone know of a supplier I should check out? I'm basicly tryin' to keep all my switches the same low profile style. I found one place so far, but they want 90 dollars for it.... I'm hoping there's something out there in the sub-40 range.

PM me with the Spec's of the Item you are looking for and I will talk to me Vendors that I deal with at my work.

Quote: Originally Posted by THRASHER2 PM me with the Spec's of the Item you are looking for and I will talk to me Vendors that I deal with at my work.

Basicly I'm looking for a 18-22mm low profile momentary that has a normal-open and normal-close with a common terminal on back. It's kinda unnerving when you find yourself looking for parts they don't really exist in the normal channels for your PC.

Quote: Originally Posted by Iateronmly Basicly I'm looking for a 18-22mm low profile momentary that has a normal-open and normal-close with a common terminal on back. It's kinda unnerving when you find yourself looking for parts they don't really exist in the normal channels for your PC.

You have a Pic of a sample from the Internet.

Quote: Originally Posted by THRASHER2 You have a Pic of a sample from the Internet.

http://www.action-electronics.com/pdf/antivandal.pdf

S82 or S84

ADD: Found a S84 style for 22 dollars at Galco. w00t!

If you have not ordered yet, take a look at these:

Digi-Key Part Search

http://www.apem.com/pdf/AV-B.pdf

You need a simple latching circuit.

Quote: Originally Posted by thedemonxanth You need a simple latching circuit.

Already said I'm going to be doing a flip-flop.....