Supplemental Lessons (Day 2)
Make sure to do the regular day 2 lesson first. Here is a link if you need to find it.
https://www.rcccamp.org/day-2-tuesday-servos.html
https://www.rcccamp.org/day-2-tuesday-servos.html
Controlling 2 servos with one potentiometer
(Continues from the last day 2 activity)
Someday you may want to wire up many of these servos to control a lot of things. We should learn how to change a code to add more of the same thing. Below is code similar to the end of the 3rd lesson from day 2 on controlling one servo with one potentiometer.
Now, below is the same code but just adding the lines needed to control a 2nd servo. Note what changes. Is there a trend for the changes? Try it out and see if you can get it to work.
Remember that below is how to wire up two servos. The potentiometer wiring looks the same as before.
Multicolor LED
Here is a video showing you the basics.
Set up your breadboard similar to below and use the 220 resistors for your board.
It does not really matter what pins you use for red, green, and blue (RGB) as long as they have the ~ symbol in front of the number like ~11 or ~3 etc.
The ~ symbol by an Arduino pin means Pulse Width Modulation. You don't need to know what that is right now, but that to get the best light results it helps for the 3 color RGB light.
It does not really matter what pins you use for red, green, and blue (RGB) as long as they have the ~ symbol in front of the number like ~11 or ~3 etc.
The ~ symbol by an Arduino pin means Pulse Width Modulation. You don't need to know what that is right now, but that to get the best light results it helps for the 3 color RGB light.
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Watch this video to get the background for this activity.
Getting the colors on (Blinking)
Use the same code that you used to get your regular LEDs on and off and see if you can get them to turn on the Multi color LED's colors. You may have to change the pin numbers used in your code. If you have trouble, you can start with this code to the left.
Now that you got one light on, go ahead and change your code to try and change colors or get two colors on at once.
Now that you got one light on, go ahead and change your code to try and change colors or get two colors on at once.
Set Colors your own color
This code is used to set up your led to be multiple colors and brightness at once.
You change the numbers in the "setColor(255, 0, 0);" part to change what colors your LED makes.
You change the numbers in the "setColor(255, 0, 0);" part to change what colors your LED makes.
Getting the colors to switch
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Now that you have gotten the code to work, try adding the other colors to digitalWrites to get the colors to switch.
You add this to the loop just like you added delays and more digitalWrites to your blink code. Once you get it to work, change the values in the set color part to numbers between 0-255 and see what happens. |
