Shape memory alloy actuator with Arduino

[miumiu]

Hello!

I am struggling to come up with a circuit layout for my sma based actuator that is controlled with Arduino (pwm).

I am mostly struggling to find out what kind of electrical components are required.

From my first layout, my teacher said that there are gate drivers missing for each transistor. Is there anything else that I would need?
For example a diode to protect the components from voltage spikes oder anything like that?

Also, the idea was to integrate push buttons, so that the actuator can be controlled manually from the user. But my teacher said that the controllability is provided by the PWM already and buttons are not necessary.

The voltage applied is 6V and the current the SMA needs is about 3-6A.

I appreciate every help!

[johnerrington]

https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/681307/2

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

Your shape memory actiuators (actually all actuators) are "motors" - so see here

How to control a motor from the arduino using pwm

skillbank: Experiments and projects with an Arduino microcontroller