Automating Brio Trains with a Micro:Bit

A couple Micro:Bits, a 9g servo, and a scavenged reed switch conspire to make wooden trains fun again.

Quantity		Component name
1	×	Micro:Bit with AAA battery pack
1	×	Optional second Micro:Bit with AAA battery pack for remote
1	×	Wooden railroad switch (must be active)
1	×	9g servo
1	×	Reed switch
4	×	Alligator clips
1	×	Battery powered locomotive (like the Brio Mighty Red Locomotive)