vibrating_Cake Posted October 30, 2009 Report Posted October 30, 2009 right... ive found my shiftlight!!! (waaay) what it does, is with increasing revs it has 6 lights 3 greeen 2 amber 1 red... i want to fit this to the capri's dials... BUT i have a plan! i want to open up the shift light box, and take out the orange LED's and RED LED and replace them with two wires (to attach to remote LED strips) so.... when the shift light increases, it turns the remote LED's on which im going to put into my dials (easy enough so far, just cut the LED's off, marking + and -, then re-attaching LED's further down the line... BUT! earlier in the year i was experimenting with LED strips in the dials with great success! now heres where i need help... i want to wire the shift lights orange and red lights in just like ive wired the blue ones in, nice strip of lights stuck in so when they turn on it lights the dials up nice and bright... BUT i only want one colour on at once, so with the BLUE dash lights on... i rev the engine, get upto~5krpm and i want the BLUE to turn OFF and YELLOW to turn on (the ON signal coming from the shift lights computer thingymibobs) and then when the YELLOW switches to RED i want RED on but BLUE off. and when RED+YELLOW are OFF i want BLUE on, if you get me so basicaly i want the blue lights to be ON, but when either red or yellow lights come on, i want the blue to turn OFF and back ON again when the yellow/red have turned off.... what would i use for this kinda thing? i can buy transistors resistors etc fine and solder them onto a small board if need be, how would i go on about doing this?? something that makes B= blue R= red X= orange 1=on 0=off B=1 if R=0 AND X=0 B=0 if R=1 OR X=1
Copey Posted October 30, 2009 Report Posted October 30, 2009 you could probably wire in a switch that you wire the dash lights through and then when the shift lights turn on it would overide the dashlights and only give power to the sift lights let me have a look and see if i can find something suitable
vibrating_Cake Posted October 30, 2009 Author Report Posted October 30, 2009 i was thinking having a single ground, both red and yellow being on the single ground (because them being on/off are controlled by the shift light) and the blue is controlled by the switch thing that switches the ground to the blue LED's when the ORANGE/RED arent on.... so orange and red can come on when they please, whenever power is given to them, but when they are on, it cuts the shared ground to the blue LEDS, or something of the sort? means i only have to have one switch or whatever i use... so normally it lies on blue, then when it sences 12v going through from either orange or red it cuts the ground for the blue... and when the 12v goes off for the orange/red it gives the ground back
Copey Posted October 30, 2009 Report Posted October 30, 2009 possibly, download a PCB wizard program you can do virtual mock ups of the circuits and see if they will work or not
caprinerd Posted October 30, 2009 Report Posted October 30, 2009 let me see if ive got this right when driving normal you want the blue lights on but when you get to a certain rev you want the yellow to come on but the blue to go out and when the red comes on you want the yellow to stay on and still have no blue have i got it right
Fishtailparka Posted October 30, 2009 Report Posted October 30, 2009 It is very "simple" and cheap to program a microprocessor to do this for you. It could probably be done for a fiver or so. The downside is that you have to be a clever c*** I'm still trying to program a single LED to flash on and off, so I'm not your man.
vibrating_Cake Posted October 30, 2009 Author Report Posted October 30, 2009 let me see if ive got this rightwhen driving normal you want the blue lights on but when you get to a certain rev you want the yellow to come on but the blue to go out and when the red comes on you want the yellow to stay on and still have no blue have i got it right noooo, i have a shift light module, which has 5 lights, where 1 green comes on at 2krpm, 2 and 3krpm, 3 at 4krpm 1 orange comes on at 5k and 6k rpm 1 big red light comes on at 7krpm im not sure if they stay on or not, but i want the blue lights to turn off while the other lights are on. or to make it easier, i want my lights as normal, but when i hit 7k and the red light comes on, i want the blue to temporarily turn off while the red is on, so the dasboard is lit up red for that instance the shiftlight is on, and when i change gear and the red turns off, i want it back to blue
fuel_junkie Posted October 30, 2009 Report Posted October 30, 2009 Just an idea, dunno if it would work... current always flows the path of least resistance. so... you want to find a way of making the blue LED's having a higher resistance than your red one. The red would then be on an RPM specified switch. But the red LED circuit should have an over all lower resistance than the blue set. the current then would find it easier to go through the red LED by bypassing the blue ones. When the switch turns off. (rpm activated again) it has no choice but to go through the blue.... If anythink it would make the blue very dim but LED's do not light up if they dont have the correct current i believe?... does that sound like it could work or am i talking bullpoo??
vibrating_Cake Posted October 30, 2009 Author Report Posted October 30, 2009 that would work with bulbs for sure, but with LED's they drain such a small current it'd be hard to sort everything out with resistors and calculations etc, im sure theres an easy way i seem to remember a small diode shaped electronic thing with three legs, that when current flowed in one direction it opened up, but when it flowed in the other direction it swiched, like a transistor or something, god knows, its years since i did anything like that
Fishtailparka Posted October 30, 2009 Report Posted October 30, 2009 If you run the blue light through a relay (just a titchy one not a great big thing) so it was wired to the NC part of the output it would be on when it was supposed to be. Then using the feed that goes to the red LED to switch the relay, when the red light came on the blue light would go out as the relay switched to the NO output. The LED power may well not be enough to switch the relay, but using a transistor it would be. (some of that might sound like complete waffle, but it would work because i can see it inside my head )
vibrating_Cake Posted October 31, 2009 Author Report Posted October 31, 2009 so using a transistor and wiring it so the blue light works when its turned on, but when the red light is turned on it switches and steals the power from the blue LED's and gives it to the red ones? ......... howd the hell i wire a transistor in lol!
Fishtailparka Posted October 31, 2009 Report Posted October 31, 2009 Use a titchy relay instead http://www.maplin.co.uk/Module.aspx?ModuleNo=2512 These are changeover relays, so use one circuit for the blue dash lights, and the other for the red. Using a feed from the red light of the shift as a feed for the relay it will let the blue dash lights be on as normal, but when the shift lights up the red it will switch the relay over to the red circuit. I'm sure it's possible to do it with transistors, but it would take me ages to fiddle about figuring how to wire it up. This isn't a great way of doing it but it should work. As the shift (shouldn't) be on red much it's not going to draw much current. EDIT: if you had permanent live to the dash lights, and used the above to switch the earth instead, the red dash lights would work independantly of the dash lights being turned on or not.
vibrating_Cake Posted October 31, 2009 Author Report Posted October 31, 2009 you sir, deserve many beers!!!!!
over_head_cam Posted October 31, 2009 Report Posted October 31, 2009 Would the feeds to the led's be enough to trip the relay?
Fishtailparka Posted October 31, 2009 Report Posted October 31, 2009 Probably, but if not, that is when you start fiddling with transistors.
Fishtailparka Posted October 31, 2009 Report Posted October 31, 2009 If you need a transistor, I think this would work. (note the + and - have moved in the diagram) diode is 1N4148 http://www.maplin.co.uk/Module.aspx?ModuleNo=19076 Transistor is BC547C http://www.maplin.co.uk/Module.aspx?ModuleNo=19061 No promises mind
vibrating_Cake Posted November 1, 2009 Author Report Posted November 1, 2009 http://www.maplin.co.uk/Module.aspx?ModuleNo=46386
Fishtailparka Posted November 2, 2009 Report Posted November 2, 2009 WTF does that mean? As far as i can make out you are now using a brown cock to power your relay.
vibrating_Cake Posted November 2, 2009 Author Report Posted November 2, 2009 hahahaha my dads MSpaint skills show through there... thats the LED on the shift light, the + at top - at bottom, (obviousley ill cut the led end off it so its there purley to power the relay) that is used to feed the + on the top of the relay and - on bottom of relay, so when it provides a feed it switches the relay down to feed the red lights and cuts power to the blue lights, which use power provided from the +12v feed for dash lights wire and both dash lights use a common ground. then the diode ive put a link up for (switching diode) goes between the relay pins so any un-wanted voltage doesnt kill the mini relay or burn it out =)} does that look right???
Fishtailparka Posted November 2, 2009 Report Posted November 2, 2009 Looks OK to me, but I am making no claims to being an expert. The diode you linked to is the same one I linked to further up.
vibrating_Cake Posted November 2, 2009 Author Report Posted November 2, 2009 ohhh i seee it! sorry lol
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