Remote control tailcap

nuggett · Jan 15, 2016

I am interested in a Surefire 9p tailcap that contains a bluetooth module to remote control the light,on-off. Anybody who could attempt this?
And while your here!.....another tailcap to act as backup power for my cell phone with mini usb?

DrafterDan · Jan 15, 2016

okay, it sounds interesting. A quick check shows most small bluetooth modules are meant for Arduino systems, meaning they need 'brains' to work. There's got to be a smaller module out there, I have one in my LCD speedometer on my bicycle, so it is wireless between the display and the wheel sensor.

At the minimum, you'd need a completely new tailcap housing. Not much room at all in an existing Z41 tailcap.

nuggett · Jan 15, 2016

So, one of these and one of these in a tube extension and duct tape

http://www.amazon.com/dp/B00L083QAC/?tag=cpf0b6-20

http://www.tested.com/tech/robots/456466-know-your-arduino-guide-most-common-boards/

just like me · Jan 15, 2016

This is interesting:
http://appleinsider.com/articles/13...ntrol-to-conventional-battery-powered-devices
http://tethercell.myshopify.com/

nuggett · Jan 15, 2016

I just emailed them.

nuggett · Jan 16, 2016

http://www.motorcycle-superstore.com/37817/i/gmax-gm54-67-78-helmet-led-brake-light-kit

DIWdiver · Jan 16, 2016

One of the challenges in a tailcap is that you don't have access to the + side of the battery, so there's no power to run your electronics.

I have managed to overcome this problem, but only for a circuit that draws a minuscule amount of power. Nowhere near enough to run an arduino or most BT devices. To run those, you're going to have to bring the + side of the battery back to the tailcap, or have a separate battery in the tailcap to run the electronics.

nuggett · Jan 17, 2016

would a watch battery work for, say,12 hrs or so?

DIWdiver · Jan 17, 2016

A CR1620 is 75 mAH or so, so for 12 hours could put out 6 mA. I think the new low-power BT may be able to run that low, but not an arduino. There are processors that will run that low, but you would probably have to do some of your own design work, unless you can find an off the shelf module that will run that low.

nuggett · Jan 19, 2016

Scott,

Thanks for the note. It will probably work, but our Android app has not been maintained well due to lack of funding. Just letting you know.

Thanks,

Team Tethercell

nuggett · Jan 19, 2016

I dont know what that response means

Remote control tailcap

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