The results showed that, when the duty cycle of the pulse of David moth is - 10% motor to rotate around the minimum. The round speed measured from Tachometor. And the value from the LCD to Micah about in 123 120 and RPM, respectively. If the value of the duty cycle of the pulse of David moth negative value rising. The round speed measured from Tachometor. And the value of LCD is the speed more and more. Until a maximum speed of around Chong Motor. The motor to rotate as soon as possible, the duty cycle of the pulse of David moth - 99.6 average ความเร็วรอบที่ measured from Tachometor. And the value of LCD Micah about in 966.4 719 and RPM, respectively.
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