speed controller for dc motor

3:04

3:05

18:14

8:45

5:09

5:50

3:22

4:40

3:46

2:37

3:28

3:46

3:48

10:01

13:12

10:01

5:35

10:11

3:13

2:16

3:46

2:48

3:46

7:49

9:52

10:07

12:35

4:50

10:36

1:26

13:27

10:46

2:55

55:40

2:48

کوتاه

8:01

5:59

3:57

3:57