Why do we need PWM?

Related questions

1. Why PWM techniques are used?
2. What is PWM used for?
3. What is 4 pin Molex connector?
4. Can I use a CPU fan header for a case fan?
5. What is a chassis fan connector?
6. Can I connect a 3 pin fan to a 4 pin connector?
7. What is PWM fan?
8. How many fans can you connect to a motherboard?
9. What does Molex connect to?
10. How do I connect 4 pin fan to Molex?

Tags

1. #precision
2. #control
3. #information
4. #systems
5. #digital
6. #applications
7. #certain
8. #convey
9. #important
10. #speed
11. #motor
12. #technique
13. #communication
14. #essence
15. #controls
16. #where
17. #protection
18. #channel
19. #communications
20. #cycle