anglia4 Posted September 14, 2012 Share Posted September 14, 2012 I'm trying to wire up the indicators on my motorbike so that I can have a momentary switch on each side of the handlebars. Press the button on the left handlebar, indicators start flashing Press is again, indicators stop flashing I tried to achieve this with the following circuit But upon bench testing it, the latching relays don't seem to be doing what I wanted them to. I can't get the lights to come on at all. (the reason for the second relay is that the latching ones I got from Jaycar are only 1A which I think is a bit dicey for running my indicators. The indicators [switched load] is across terminals 3-5 on the second relay). How can I make it work without spending gynormous amounts of mulah? EDIT: I had hoped that when you pressed the button and the latching relay switched the indicators on with one pole, it would switch the other pole from one coil to the other so that when you pressed the button the next time it would activate the opposite coil and switch the other way. Quote Link to comment Share on other sites More sharing options...
Ned Posted September 14, 2012 Share Posted September 14, 2012 Build this circuit http://www.flickr.com/photos/todbot/436 ... /lightbox/ and on the output on the far right, instead of having 5V, have 12V and connect pin 1 and 2 of your relay to pin 1 and 2 of the connector that goes to that transistor on the right. To create 5V from 15 to run this little circuit, simply use an LM78L05 (you can buy these from jaycar, just like all the other bits like the 555) and put a 100nF ceramic cap in the 12V side of the 78L05 and on the 5V output. Also maybe put a larger cap, like a 220uF electro on the 12 input as well just for lols. Also put a diode across the coil of the relay. a 1n4007 should cut it. Put the anode on the negative connection of the coil and the cathode to the 12V side. That enough info? Quote Link to comment Share on other sites More sharing options...
ThePog Posted September 14, 2012 Share Posted September 14, 2012 Some gibberish You are a mechanical engineer, stop fucking with things you are constitutionally unable to understand. Quote Link to comment Share on other sites More sharing options...
governorsam Posted September 14, 2012 Share Posted September 14, 2012 in the past i have used a 6v mechanical flasher unit per side and just hold the switch on. harleys have this system, are sensitive to bulb wattage. Quote Link to comment Share on other sites More sharing options...
Ned Posted September 15, 2012 Share Posted September 15, 2012 You could always just use on/off switches that latch... Quote Link to comment Share on other sites More sharing options...
EURON8 Posted September 15, 2012 Share Posted September 15, 2012 Why can't you just tap into the existing wiring with 2 switches. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted September 15, 2012 Share Posted September 15, 2012 You could always just use on/off switches that latch... this was the very first thing i thought of. you're over complicating it. i think they are called 'pnpo' push on push off, but i might be wrong. Quote Link to comment Share on other sites More sharing options...
anglia4 Posted September 15, 2012 Author Share Posted September 15, 2012 Yeah that would be the ideal scenario but I have found really nice handlebar mounted switches but they are only momentary buggers. I'd love to use the ones from jaycar which are latching switches and luminate around the edge but they won't fit nicely to my bars. Quote Link to comment Share on other sites More sharing options...
anglia4 Posted September 15, 2012 Author Share Posted September 15, 2012 Build this circuithttp://www.flickr.com/photos/todbot/436 ... /lightbox/ and on the output on the far right, instead of having 5V, have 12V and connect pin 1 and 2 of your relay to pin 1 and 2 of the connector that goes to that transistor on the right. To create 5V from 15 to run this little circuit, simply use an LM78L05 (you can buy these from jaycar, just like all the other bits like the 555) and put a 100nF ceramic cap in the 12V side of the 78L05 and on the 5V output. Also maybe put a larger cap, like a 220uF electro on the 12 input as well just for lols. Also put a diode across the coil of the relay. a 1n4007 should cut it. Put the anode on the negative connection of the coil and the cathode to the 12V side. That enough info? To be really difficult, my switches are single wire and ground through the bars am I fucked? Quote Link to comment Share on other sites More sharing options...
Ned Posted September 15, 2012 Share Posted September 15, 2012 ok, build this; and then i can write you some code to get it to work still. Make sure that parts placed close on the schematic, are places physically close as well. Especially the capacitors. Quote Link to comment Share on other sites More sharing options...
Ned Posted September 15, 2012 Share Posted September 15, 2012 please note i just quickly drew that up while running around like a headless chicken so i may have made a tiny fuck up here or there haha Quote Link to comment Share on other sites More sharing options...
anglia4 Posted September 16, 2012 Author Share Posted September 16, 2012 Thanks for that Ned! I really appreciate the help. Getting my bike running for next weekend is a bit of a priority at the moment so I've just made some simple plates to hold latching switches to the bars for the moment. I'll look at doing the circuit that you have drawn up there in a couple of months time. Cheers! Quote Link to comment Share on other sites More sharing options...
Ned Posted September 16, 2012 Share Posted September 16, 2012 No problem. Pm me if you need a hand Quote Link to comment Share on other sites More sharing options...
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