mechanical paddle boat
저자: Kaela Foran
1. mechanisms
1.1. rack and pinion
1.2. worm and worm wheel
1.3. pulley system
1.4. compound gears
2. electronics
2.1. circuit board
2.2. SPST switch
2.3. transistor
2.4. battery pack
2.5. DPDT switch
2.6. resistor
2.7. LDR
3. materials
3.1. plastic
3.1.1. white
3.1.2. turqouise
3.1.3. black
3.2. cardboard
4. equipment
4.1. files
4.1.1. smooth
4.1.2. rough
4.1.3. needle
4.2. saws
4.2.1. copingsaw
4.2.2. hacksaw