
PROJECTS: Rheoscopic Storm Globe
2. WIRE UP THE BLUEFRUIT
We’re going to just use the USB voltage (5V) to
power our fan. There are better ways to do this,
but let’s keep it simple! Cut off any connector on
the fan wires, and strip the wires back a bit. Then
attach the black wire to GND, and the red wire to
VOUT (which is 5V, if you’re powering the board
from USB). You can solder these if you like, or
just make sure the wire is wrapped around the
edge of the hole tightly to make a good electrical
connection (Figure
C
).
3. ASSEMBLE THE STIR PLATE
Attach the fan to the Bluefruit using non-ferrous
M2.5 or M3 screws and standoffs. On a 40mm
fan, the ...