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# Gather Materials:
** Bicycle: A road bike with small threads is preferred
** Bicycle Stand: Look on Craigslist.
com,or retail stores online
** 12V DC motor: A convenient place to purchase is at Alternative Power, Inc in Arcata, CA
** Inverter: any hardware store
# Construct motor/roller
** To connect your DC motor to your bicycle trainer you must examine the resistance roller to see if the motor shaft can be coupled with the roller
Deconstrust your roller so that the roller shaft can be coupled with the motor shaft
** Couple the two shafts together, a rubber couple would be best if the two shafts are not in equal width
** Investigate where the motor should be placed, so that you can mount it to the bicycle stand
** Mount the motor by placing a
peice of metal between the mounted roller and the spring loaded board.** Construct a mount that will hold motor in place, preferrably two peices slightly on either side of the motor as shown below. The motor may vary in size so there are no dimensions given, but the general idea is to mount the motor so that it will not move once coupled with the roller.
#. Build electrical circuit
** Here is a diagram of what needs to included in the circuit
** Use soldering gun to connect fuses, diode, voltage, regulator, battery, and inverter. Clamps are acceptable to connect
peices of circuit.*** First slip a sleeve of shrink tape over one wire and slide it out of the way of the solderng gun.
*** Hold wires together(make sure you use proper protection) and solder the wire ends together.
*** Once wires are connected, slide shrink tape over exposed wires and used a flame to tighten the tape.