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docs/Assignments/week_10_output_devices/output_devices.md
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@@ -146,17 +146,25 @@ I also milled a pcb to test the motors with because signals on breadboards are s
![alt text](image-11.jpg)
## Group assignment
### BLDC motors
For this group assignment we needed to connect and measure an output device. We used my brushless motor as an example. We connected it to my power supply because it had an XT-60 connecter and the drone esc also had a XT-60 connector.
![alt text](image-6.jpg)
The motors and esc are rated up to 4S. What is 4S? 4S means the amount of lipo cells connected in series. When connecting them in series the voltage adds up. So 1S = 4.2V, 2S 8.4V, 3S 12.6V and 4S 16,8V. So they can take a maximum of 16,8 volts. We started off with 12 volts. When the motor needed to start it surged a lot of power and stabilized later on.
The motors and esc are rated up to 4S. What is 4S? 4S means the amount of li-po cells connected in series. When connecting them in series the voltage adds up. So 1S = 4.2V, 2S 8.4V, 3S 12.6V and 4S 16,8V. So they can take a maximum of 16,8 volts. We started off with 12 volts. When the motor needed to start it surged a lot of power and stabilized later on.
![alt text](image-7.jpg)
![alt text](image-8.jpg)
When touching the motor I created friction and thus it needs more current.
![alt text](image-9.jpg)
Here you can see it hit the maximum of the power supply (60watts). If it goes any higher than this the power supply will go into surge protection mode and shut down. But when running the motor it stays between 30 to 40 watts. So if I wanted to run all motors I needed about 120 watts. But I also need to be able to surge power so the motors can start so that will add an additional 40 watts. So I will need about 160 watts to power 4 motors.
### Led strip
Henk also showed us the ledstrip with a program where the leds turn on one by one and the colors change.
![alt text](image-12.jpg)
![alt text](image-13.jpg)
Henk also changed the light to blue and there we could instantly see that the amount of current needed went up. So depending on the color light you may need more or less current.
### Power supply
Here are the files to build the PSU yourself. I don't recommend building it without making a top lid. Otherwise you will have a very hard time assembling it.
Link to PSU: https://git.smikkelbakje.nl/Smikkelbakje/Labvoeding