Pololu Universal Aluminum Mounting Hub for 3mm Shaft, M3 Holes (2-Pack) Shipping:2-4 Weeks The Sound Detector not only

The Sound Detector not only provides an audio output

The SparkFun Nano Power Timer will run while only consuming minimal power (approximately 35nA) and turn your project on after a set amount of time

As described above

but decreases the effective range to 18cm to 6m (7" to 19

Solder connections for male headers on the 3pi expansion kit with cutouts

Pololu Universal Aluminum Mounting Hub for 3mm Shaft, M3 Holes (2-Pack) Shipping:2-4 Weeks The Sound Detector not onlyThese universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 mm diameter motor shafts. The set includes two hubs, two M3 set screws for securing the hubs to motor shafts, and one 1. 5 mm Allen wrench for use with the set screws. Each hub has four threaded mounting holes for M3 screws (not included). Mini gearmotor with bracket and hub. These universal mounting hubs are designed to work with most 3 mm diameter shafts ,