A friend of mine practices the sport of archery and trains hard - now in the autumn it is early dark and he needs light at his target-optics on the bow. It needs to have a small light source to provide its target-optics with a little light so can target also in the darkness.
CircuitTo solve this initial structure has contributed: take a modifiable light source (on my desk was me a lamp and a 12er Neopixel ring available and a photon, which can also be replaced by alternative devices).
Decisive is the transmission of light over a distance: from the light source to the target-optics by means of a single fiber wire. I took this from a cheap hairwear.
Put GND to GND and 5V to VIN; Data In to D4 and flash attached example code by including Adafruits Neopixel Library.
I have switched off the internal photon LED to avoid disturbing light sources.
// take control of the Particle Device internal LED
RGB.control(true);
RGB.brightness(0);
If you do not have a light source available, a wire end simply holds the LED activated in your devices.
Demonstration - In the BrightPut one end on the one active LED (in my test number 2) and observe how the other end changes both in coloration and in the changing brightness.Even a very small light source is enough to still recognize a result.However, if the source is switched off, there is no light at the other end.
Now it has to be built into the target optics of the archer. I'll stay out of this.Hats off to you archers: Although it looks so easy, high concentration is required.
Background - Links:
http://deutscher-bogensportverlag.de/tipps-fuer-bogenschuetzen-zur-visiereinstellung/
https://www.archerydirect-shop.de/html/de/bogenzubehoer/visiere
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