Brake System: When the foot pedal is released while lifting, the brace is pulled from the cleat via a motor. The cleat closes on the cable, and the AutoSpot will hold the weight for the user. The user can now remove the weight and reset the system before the next set.
Materials:
- Wood for base ($10)
- Retractable cable ($15)
- Pulley ($5) and machined aluminum pulley mount
- Cam cleat ($20) and machined aluminum cleat mount
- Machined aluminum brace and fishing line ($5)
- DC motor and machined motor shaft coupler
- Pedal assembly: plexiglass, hinges, switch ($8)
- Arduino duemilanove, breadboard, and circuit components
- 3x 9V battery and adapter ($10)
- Screws, bolts, and nuts ($10)
- Spray paint ($10)