Button activated wireless LED?
I'll explain my question here:
I want to make a small red LED to activate whenever a press a button, but it has to be wirelessly, as I want to put the LED IN a rosin sphere. Is there any way I can do it?
I would do that with a ATmega ATtiny85 and an HC-05 Bluetooth module, the led (probably a multi color one) and a 3.3 volt battery. You can get a free Android (and probably iPhone too) app that turns on the led. You would have to minimize power consumption somehow, maybe a using a transistor to power down the HC-05 for sleep intervals (or use a Bluetooth LE module). I think the HC-05 uses 20mA of current, the ATtiny85 about 8 mA, and the led around 20mA, so a higher capacity battery than a coin cell type would be needed.
On second thought the Keyfinder in the source could be modified to light an LED rather than beep, and it it closer to what you want. Http://www.amazon.co.uk/Tingkam%C2%AE-Waterproof-5050RGB-Lighting-lighting/dp/B00H7T7XA2/ So where are you going to power it from, and power the heavier load of the receiver?
http://www.amazon.co.uk/...00H7T7XA2/" class='ext_link'>Http://www.amazon.co.uk/...00H7T7XA2/
So where are you going to power it from, and power the heavier load of the receiver?
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