The video showcases the harvesting of components from a hairdryer to create various projects. The components include a heating element, switches, a DC motor, a full bridge rectifier, a power cord, a fuse, and a thermal breaker. The creator uses the heating element to make a foam cutter, a fuse, and an engraver. The engraver is improved by using a fan from the hairdryer to remove smoke. The video also demonstrates how to make a power resistor using the heating element. Additionally, the creator uses the hairdryer as a variable resistor to control the speed of the fan. The video promotes KiwiCo, a company that offers hands-on STEM projects for kids, and encourages viewers to sign up using their link.
Here are the key facts extracted from the text:
1. A hairdryer can be disassembled to harvest various components.
2. The components that can be harvested from a hairdryer include a heating element, switches, a DC motor, a full bridge rectifier, a power cord, a fuse, and a thermal breaker.
3. The heating element of a hairdryer is made up of resistive wires.
4. A foam cutter can be made by unwinding the heating element and using it as a resistive wire.
5. The wire from the heating element is around 250 milli ohms per inch.
6. A fuse can be made from the wire of the heating element.
7. The wire can be used as a power resistor.
8. The wire has two different types, one thicker and one thinner, which melt at different currents.
9. A variable resistor can be made from the wire.
10. A hairdryer can be used as a power resistor with multiple settings and a cooling fan.
11. The heating element of a hairdryer can be used to make a high-power resistor.
12. The resistor can be cooled down by blowing air over it, allowing it to handle higher currents.
13. The hairdryer's motor is driven by a DC power supply.
14. The hairdryer's heating element can be used to make an engraver.
15. The engraver can be made safer by using a terminal block to hold the wires.
16. The fan from the hairdryer can be used to remove smoke from the engraver.
17. A 10-ohm 250-watt resistor can be made from the wire of the heating element.
18. The resistor can be used to limit the current to a hairdryer.
19. A potentiometer or variable resistor can be used to tune the speed of a hairdryer.
20. The hairdryer's resistor has multiple settings, allowing it to handle different currents.
21. The hairdryer's resistor can handle up to 1440 watts of power.