Speed simulator for racing games or coaster simulators

Step 3 Soldering the diodes and the switch.

ok, don't ask me for what the diode in the middle is good for! i don'T know, the fact is that with that one in it spinns better and faster. i don't know much of electronics, but the diodes, let only half of the current flow to the motor, and in the part where no current is flowing the motor is spinning and acts a s a dinymo. so actually it should be a shortcoming but it works much better than without! maybe somebody can explain this to me :)

ok, solder the diodes like in the picture and if you want you can add also the switch!

pay attention to solder the diodes the way needed to make the motor turn in the correct direction!