how it going guys i have a quick question for you. i dont know how many out there watches stargate, but i have had a cool idea for a stargate themed case and was wondering about some input. i want to make a DHD http://www.gateworld.net/omnipedia/technology/d/dialhomedevice.shtml. and i want to make it so that the computer will not turn on unless the right seven symbols are pushed. i know the way to do it, under each of the symbols i would put and push button switch. and make the activation button a momentary switch. but what the problem is i need the other switches to "unswitch" after a minuete or so. any help on how to do this is apprecieated thx in advance. isho
I love stargate, so this should be a cooll mod To solve the 'unswitch problem' you could either set up the switches each with a large capacitor, as when the cap drains the switch would go off. or you could make a PIC (or similar) program todo all the lighting etc.
you would have to make some circuit to make it turn on and off.... i would either ask a mod to move this or make a new thread in the electronics section i would think you would get more help on a circuit design... i think it would be a complex circuit if u want to type in the 7 symbols in a particular order to turn on the PC...
All you have to do is put 7 switches(not momentary, the other kind) in a circuit, with a momentary one, which can ne anywhere in the circuit. All of the switches would have to be in the on position for it to work. Of course, like this, it wouldn't matter what order the switches are pressed, aside from the momentary, which would have to be pushed after all the other ones are on. This is illustrated in my crudely-drawn diagram:
I thought of the same thing, but its far too simple... as all someone has to do is turn all the switches available to 'on' then press the momentary on switch to gain access. imo would be far cooler to actually have to put it in a certain order.
You could maybe try something like this digital combination lock but have 7 4013 (and one for the big red center button) instead of 4 and have how ever many other buttons there are on the dhd reset it all. This schematic has the output going to a relay but you could change that to just trigger a pulse to turn on your comp. Good luck, should be a cool mod.
im not really worried about locking people out of it, just worried about the coolness factor. so all i need is some kind of button that unlocks after a minute or so. i would have it set up like zero showed.
Maybe try looking around at "one-shot" or monostable circuits utillizing the 555 timer- you could have the first switch trigger the 5v pulse that lasts for x amount of time, say a minute. This high output could be the high trigger for the other six switches and would only work for as long as the output of the timer is high. Just an idea.
Cool I was going to suggest using a couple of flip flop (as in bandik zorak's posts), but wouldnt these equire some precise timings for the button presses. When it gets the right combination it'll output a '1' signal - you can have this hooked up to the to the comp as your switch. If you do it this was, you';d have to dial in the same cordinates to switch the machine off. BTW, what coordinates would swicth on the comp? Would it tbe the land of the tor-ri?
To the above link - that circuit requires all of the switches to be pressed at the same time. The DHD requires the buttons to be pressed in the correct sequence, one after the other.
what you want it a security door keypad sort of circuit.. the 12 digit keypad ones.. but i cant remember where a circuit is... its quite complex if i remember correctly..
Hmm, I'm inclined to think that the one-shot 555 is the way to go, but the sequence would be hardwiredm unless you had faston/quick connect terminals on the the switches. I'm thinking of a 555 one shot,triggered by a momentary pushbutton, with a delay of about 5 seconds (which needs a biiiiig cap and resistor). The output of the 555 is hooked into a transistor to act as a digital relay (like the GPO relay's I've seen hooked up to Matrix Orbital displays). There would be one of each of these for each button in the setup--or at a minimum, for the ones that need to trigger the combo--daisy chained in the lock combination sequence so that each one would only be able to conduct to the next one if they were pressed in sequence. Maybe this will help: The first one in the sequence would only have a momentary switch to kick things off. The logic out from the 555 (high or +5V) would be connected to the next switch, which would activate a transistor connected to the next 555 trigger... Wait, are the transistors even needed? Hmm, perhaps you can just run from the switch to the next 555. My thinking is that using a NPN (PNP?) transistor will allow each sub-circuit to have the full amount of time from each button press, instead of making the whole timer collapse when the first one cycles back to logic low. Well, you get the idea of the logic behind them. I'm not entirely sure how you would go about getting them all to reset if you wait for the last switch that was pressed to time out, or how you would keep all the LEDs in the buttons lit until the sequence was either correctly activated or timed out... I'm sure there are some flaws to it as well, like just pressing the last button again to start the timer over. Would a monostable reset by re-triggering the initial input? Or do you have to explicitly signal the reset pin? Yeah, I really need to brush up on 555s before I get too much more involved. You may also be better off using a PIC based solution: http://www.vermontficks.org/combo2d.htm
I think the easiest method of doing this will be to program a micro controller (such as a PIC) as that way you can switch all thi IOs on/off after a delay
As I'm doing the same case mod... lol and, luckily for you, I'm happy to share my plan, this is what you can do... if you don't want to program a chip, don't want to screw with serious electronics, heres the idiots version (ie. mine). it worked for me well enough, so hopefully it will for you. If you want LEDs, I'll explain that in a sec You need 8 switches. 7 for the glyphs and 1 for the DHD button if you're as bad as me and have a computer that swaps HDDs before boot (yes, I'm serious) then you'll want to have two codes available and thus increase the 7 switches to more. You also need 7 LEDs. Now, just for the sake of absolute suckiness, you need to decide if the DHD button is permanently lit. If it is, welcome to the world of rechargable batteries (which might I add, inside a computer system isn't too hard to do ). So, the lighting will be easyish... So far, all I've personally worked out is that I(myself) need 9 switches for the glyphs (7, same galaxy, 8 another galaxy, 9 starts my computer (note the lights in the house dim when it powers up =\) and 1 for the DHD button. Expensive? hell no! Rip them out of old cases. 2x per old case (3x if its turbo) and you're done. NEXT! The LEDs. To trigger the LEDs you need to wire up the switches with the power aswell... Either a) two switches, or b) a single DPST switch Now, wire it up to batteries (which you can recharge of the PC's power if you know wtf you're doing) and you've got LEDs that light up behind the buttons! That part was easy. Now to wire it up... Although, imho the PIC's are the way to go </confusion> btw: atm, I'm just using a standard button while I try and work out wtf to do on the bezel. I'm doing SG-1, not atlantis. atlantis is relatively easy in comparison.
WOW! I am a huge Stargate SG1, and Atlantis fan… This mod could possibly go down in moding history if done right. Just tossing ideas out there, but as you said you wanted; to turn on the computer, you have to push the right sequence of symbols. But wouldn’t it be cool if you had multiple OS’s on the computer… And to boot an specific OS you have to dial the correct Gate Address… Just an Idea.
better off programming a boot sector that does that really... use a layout the same as SGC's... it'd look cool.
Yeah I'm also a big stargate SG-1 fan, looks like a very nice mod. Good luck with it and keep us updated.
