I am doing a wearables project, and have some questions, I haven’t been able to find the answers to, or rather, the more I read, the more confused I get…
About my project:
I am building a dragonfly costume and I want the wings to flap and light up when activated by a muscle sensor and controlled with a heart-rate sensor.
At the moment I am using the adafruit flora board, powered by a 3.7V Lipo battery, the myoware muscle-sensor, powered trough the 3.3V output on the board and a Servo-Motor, powered with 6V through a separate battery holder. The flapping mechanism is set up and works well.
In the next step, my plan is to run fibre optics along the veins of the wing and a part of the dress and have the light pulsing along with the input of a heart-rate sensor.
I am planning to use around 16 LED’s and I ordered very bright ones, so it will hopefully not only be visible in total darkness.
The LED’s I have draw about 70mA for full brightness and I want them to fade in and out rather than to blink, so I need PWM, but they don’t have to be individually addressable, they should all pulse simultaneously.
My question now is, which additional or alternative hardware I would need to control and power the LED’s.
So far, my research has brought me to different boards with enough PWM-Pins, like the the Adafruit 16-Channel 12-bit PWM/Servo Driver, but it only supplies 25mA/Pin.
I also have a Teensy 3.2 here, and read it has the OctoWS2811 Adaptor for use with many LED’s, but that seems a bit overpowered.
Since it’s a wearable, size and power-sources/heat-development are an issue.
Does anyone have recommendations how to approach this?