Step 1: Materials & Tools
An old clock (doesn't need to work)
A portable cassette tape player (not a micro cassette)
Enclosed battery holder ( I used Radio Shack #270-409)
Wood ( I used 3/4" thick poplar)
A set of Fancy clock hands
Super 77 spray adhesive
Small wood molding (I got this at Michaels Arts & Crafts)
Step 2: Disassemble the Cassette Player
2. You will not need any part of the green circuit board so just break it away until you get just the plastic housing holding the motor.
3. With the motor wires still attached to the original battery case, figure out which of the two wires actually run the motor. I did this by looking at the motor and guessing. In the process of making the project, one of the wires came loose from the motor connection point and I had replace the wire and solder it back on- so have a soldering iron and some wire on hand, just in case.
4. Connect the wires to a purchased battery pack, so that the motor turns the sprockets counter-clockwise. If the wires are spinning clock-wise, then reverse them to get a counter-clockwise spin. My battery pack has an "on/off" switch. The Motor in my cassette player was 6 volts, so I made sure that the battery pack was compatible.
5. Find the sprocket that spins slower than the other; that is the one that will spin the clock hand. I am pointing to the slow one in the picture.