mealexme Posted July 2, 2014 Share Posted July 2, 2014 more of an electrical question than a bike related one, but I'm putting a charger on the bike for my phone/gps and planning on wiring it into the ignition system somewhere so it turns off when I shut the bike off.But... I want a switch which I can use to switch between the 'ignition' and a direct line to the battery. Sounds simple so far? A simple rocker switch? How about one with a "default" setting on 'ignition', so if I accidentally leave the switch on 'battery' for a few hours, the next time I turn the bike on, it will revert back to 'ignition' so it won't drain the battery over the next few days?Is this possible with a simple switch, or is it something that can only be done with programmable hardware? Quote Link to comment Share on other sites More sharing options...
al_stu Posted July 2, 2014 Share Posted July 2, 2014 Why not just buy a charger that only switches on when plugged into the phone? I'm sure Tango said his did that. Quote Link to comment Share on other sites More sharing options...
mattycoops43 Posted July 2, 2014 Share Posted July 2, 2014 Not sure about auto switching but a simple double pole double throw switch will do it, centre contacts to the charger, one end to the battery and one end to the ignition. You could wire in a telltale led so when it is set to battery there is an led showing so you don't forget. Quote Link to comment Share on other sites More sharing options...
Joeman Posted July 2, 2014 Share Posted July 2, 2014 more of an electrical question than a bike related one, but I'm putting a charger on the bike for my phone/gps and planning on wiring it into the ignition system somewhere so it turns off when I shut the bike off.But... I want a switch which I can use to switch between the 'ignition' and a direct line to the battery. Sounds simple so far? A simple rocker switch? How about one with a "default" setting on 'ignition', so if I accidentally leave the switch on 'battery' for a few hours, the next time I turn the bike on, it will revert back to 'ignition' so it won't drain the battery over the next few days?Is this possible with a simple switch, or is it something that can only be done with programmable hardware? its doable with a relay and momentary push switch to create a "Latch" circuit. Quote Link to comment Share on other sites More sharing options...
Mr Fro Posted July 2, 2014 Share Posted July 2, 2014 its doable with a relay and momentary push switch to create a "Latch" circuit.Beat me to it Joeman! Quote Link to comment Share on other sites More sharing options...
Joeman Posted July 2, 2014 Share Posted July 2, 2014 its doable with a relay and momentary push switch to create a "Latch" circuit.Beat me to it Joeman! I wouldn't don't like that though... I'd still want it to switch off after a period of time, so I'd build a simple circuit to keep the power on 20mins maybe? Quote Link to comment Share on other sites More sharing options...
Stu Posted July 2, 2014 Share Posted July 2, 2014 buy a charging port that doesnt have a light on it wire straight to the battery it will only draw power when something is plugged in are you really going to leave a gadget plugged in plus it will stop drawing power when the gadget is fully charged! your complicating matters Quote Link to comment Share on other sites More sharing options...
ApolloMozart Posted July 2, 2014 Share Posted July 2, 2014 I agree with Stu - keep it simple! Quote Link to comment Share on other sites More sharing options...
dispersion Posted July 2, 2014 Share Posted July 2, 2014 Might be wrong but...I was looking to connect a charger for my sat nav. If you relay it to the headlight in the fuse box then it only comes on when the head lights are on. I always keep my head lights on so that would work no? Quote Link to comment Share on other sites More sharing options...
mealexme Posted July 3, 2014 Author Share Posted July 3, 2014 buy a charging port that doesnt have a light on it wire straight to the battery it will only draw power when something is plugged in are you really going to leave a gadget plugged in plus it will stop drawing power when the gadget is fully charged! your complicating matters I probably am. But I've always been told chargers still draw current when the phone is charged, which is why you should always unplug them. I also don't want to forget the phone is on charge when I turn the ignition off. Quote Link to comment Share on other sites More sharing options...
Stu Posted July 3, 2014 Share Posted July 3, 2014 You won't otherwise someone will nick your phone! Quote Link to comment Share on other sites More sharing options...
Dav3y Posted July 5, 2014 Share Posted July 5, 2014 Personally i'd just wire to a switched live. If you want to get fancy you could always buy a car towing charging relay (assuming you have a 12v system) and then that would switch on supply direct from battery when the engine is running and the battery is being charged.Keep it simple i say, less to go wrong Quote Link to comment Share on other sites More sharing options...
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