In case you want to build your own, read on...
- Arduino, e.g. http://www.adafruit.com/products/50
- Ca. 7 Neopixels, http://www.adafruit.com/category/168
- Flow sensor, http://www.adafruit.com/products/828
- LiPo battery, e.g. http://www.adafruit.com/products/1578
- LiPo charger, e.g. http://www.adafruit.com/products/1304
- Jumper wires M-M, e.g. http://www.adafruit.com/products/153
- Tube fitting the sensor
- Plastic test tube
- Some zip ties
- Soldering iron
- Hot-glue gun
Step 1: Preparing and testing the Neopixel LEDs
If you use Neopixels by the meter, cut off a piece of ~7 pixels and solder jumper wires as follows:
- Black wire to GND
- Yellow wire to DI
- Red wire to +5V
Take care to solder them to the right end of the strip. Compare the little arrows printed on the strip with the picture.
Read Adafruit's Neopixel best practices before connecting the pixels.
Download and install Adafruit's Neopixel Arduino library from
Open File > Examples > Adafruit_NeopPixel > strandtest
Change the number of pixels to fit your short strip.
Upload the code to make sure the pixels work.
(This code was the starting point of the hack.)