The KidWind Photogate Bracket (KW-PGBRAC) attaches a Go Direct^® Photogate (GDX-VPG) to a KidWind Nacelle (KW-NAC). With this addition, you can count the rotations per minute (RPMs) of your wind turbine.

See also:
KidWind Troubleshooting and FAQs
How do I use a photogate to measure rotations per minute (RPMs) of a KidWind turbine?