Motors and Microcontrollers 101

Curious about connecting a motor to your microcontroller? In this NerdKits video tutorial, we explore motors from an electrical perspective, and see how back EMF, resistive, and inductive considerations lead to the design of a motor control circuit. Finally, we show two demos, one with a motor controlled with a toggled digital output, and the other with pulse width modulation (PWM) to adjust the speed in proportion to the temperature.

For more details, source code, and more, see:
http://www.nerdkits.com/videos/motors_and_microcontrollers_101/

Category:

Science & Technology

Tags:

• nerdkits
• dc
• motor
• brushed
• electromagnetic
• voltage
• current
• torque
• speed
• mosfet
• back
• emf
• 2n7000
• transistor
• n-channel
• resistance
• inductance
• stall
• winding
• coil
• triode
• breakdown
• pwm
• pulse
• width
• modulation
• control
• microcontroller
• avr
• atmega168
• digital
• output
• sensor

[Thirit]

Great job explaining whats going on with motors!

I had a DC motor with a green thing in parallel with the motor, was this a flyback diode or a filtering capacitor, which one is more common?

[nerdkits]

I'd guess that the "green thing" was a capacitor for filtering electrical noise, but the easiest way to check would be to see if the motor behaves similarly when you switch the polarity of the applied voltage. If the behavior is substantially different, then it's probably a diode, serving as a current path in one direction and limiting the speed. But in all likelihood, it is probably a capacitor. Hope that helps!

[ELECTRICIDADGENERAL]

Yes you are a very smart boy you are the future

[GraffixWB]

Dude! GREAT!! Very clear

[donyunger]

fly back diode AKA clamping diode. In the event anyone hears the term.

[manishdev1000]

great work , i learn lots from this vedio.

keep this work on .

Thanks

[plazmafeld]

Are you doing an tutorials on light speed engine circuit boardz?

[roofy2k]

where is your video on PWM you mentioned in this video?

[jfernandmy]

Great Video!

[zeeshan3dge]

Thanks a lot ! keep it up :)

[Anothercoilgun]

Don't give out too many secrets. If the lay person learns to much I am out of funds :)