WEBVTT 00:00.080 --> 00:06.050 Let's start with the first component we're going to add to the circuit, the RGB led. 00:06.260 --> 00:12.350 So basically what I'm going to do for the lessons on creating the circuit is I'm going to create a circuit 00:12.350 --> 00:18.900 first on a simulation here on Tinkercad, and then I'm going to show you the real circuit. 00:18.920 --> 00:19.100 Okay. 00:19.100 --> 00:25.640 I use this simulation here because it's simply easier to show you how to connect the components. 00:25.720 --> 00:25.810 Okay. 00:25.820 --> 00:29.870 I'm not going to use the simulation for the course just to create the circuit. 00:29.870 --> 00:34.070 And if you want to create an account on tinkercad. 00:34.070 --> 00:34.700 So that's free. 00:34.730 --> 00:35.810 That's a free tool. 00:35.840 --> 00:38.470 You go on tinkercad.com. 00:38.480 --> 00:38.900 Okay. 00:38.900 --> 00:46.070 You just create your account and then you go to circuits and you can do create new circuits here. 00:46.190 --> 00:49.280 And that is where I am right now. 00:49.370 --> 00:53.270 The first thing I'm going to do is to add an Arduino board here. 00:53.270 --> 00:57.710 So Arduino, Uno, and I'm going to add a breadboard. 00:58.220 --> 00:59.910 So let's use a breadboard. 00:59.910 --> 01:02.250 Let's use a full size breadboard. 01:03.000 --> 01:03.210 Okay. 01:03.210 --> 01:06.570 So the components you can see here, you have all the components. 01:06.570 --> 01:12.000 You just search and you have the different components. 01:12.000 --> 01:14.940 I'm going to put the Arduino here like that. 01:14.940 --> 01:20.790 And before we actually add the RGB led, I'm going to connect those two lines here. 01:20.790 --> 01:27.420 So the minus line, I'm going to connect here like that to the ground. 01:28.430 --> 01:28.590 Okay. 01:28.590 --> 01:30.840 So let's first connect the ground. 01:31.200 --> 01:36.570 So let's make a line for ground and a line for a five volt. 01:38.280 --> 01:38.550 Okay. 01:38.550 --> 01:41.220 Between the Arduino and the breadboard. 01:41.250 --> 01:41.460 Okay. 01:41.460 --> 01:44.730 So the ground line will be black. 01:45.740 --> 01:49.010 And the five volt line will be read. 01:50.020 --> 01:51.670 Okay, So that's important. 01:51.670 --> 01:57.490 First, you connect the ground here of the breadboard to the ground of the Arduino and five volt of 01:57.490 --> 01:59.890 the breadboard to five volt of the Arduino. 01:59.890 --> 02:04.150 So you can just add a black wire here and a red wire here. 02:04.510 --> 02:04.780 Okay. 02:04.780 --> 02:13.090 Now that we have this down, I'm going to search for RGB Led and just take it here and plug it. 02:13.510 --> 02:14.890 Let's plug it here. 02:14.920 --> 02:17.320 So actually, let's play it here. 02:18.680 --> 02:23.870 So one thing is that if you don't have an editor, you can also use three different LEDs. 02:23.910 --> 02:24.140 Okay. 02:24.140 --> 02:30.290 You probably know how to create a circuit with one Led so you could create a circuit with three LEDs 02:30.290 --> 02:31.610 if you don't have the RGB. 02:32.230 --> 02:32.390 Okay. 02:32.420 --> 02:37.580 And for the RGB, well, you can see that you have four legs. 02:37.670 --> 02:38.180 Okay. 02:38.180 --> 02:41.830 And here we see red cathode, blue, green. 02:41.840 --> 02:45.440 So here the order you can see is red, blue and green. 02:45.440 --> 02:51.890 But maybe the order for the colors on your RGB led and for my RGB for the physical one and I'm going 02:51.890 --> 02:56.840 to show you just after is not red, blue, green, but red, green and blue. 02:56.840 --> 02:57.230 Okay. 02:57.230 --> 03:01.940 So that you can of course, experiment with the colors and then find out. 03:01.940 --> 03:08.690 And then the pin here, the Led cathode, which is actually the longer leg of the Led. 03:08.720 --> 03:08.960 Okay. 03:08.960 --> 03:14.420 So you just check what is the longer leg and this is the cathode or this is the anode? 03:14.420 --> 03:21.810 Depends if this is a cathode, what you're going to do is you're going to simply link this to the ground. 03:21.840 --> 03:24.030 Okay, So let's use a black wire. 03:24.420 --> 03:24.690 Okay. 03:24.690 --> 03:30.150 Use black wire if possible, for the ground and red for VCC or five volt. 03:30.510 --> 03:34.380 So now that I have this ground line, I can just link the cathode to the ground. 03:34.860 --> 03:38.610 If this is an anode, you would need to link to five volt. 03:38.610 --> 03:39.810 And how to know that? 03:39.840 --> 03:44.760 Well you have to check the manual or the description of what you bought because you can't just find 03:44.760 --> 03:46.770 out from the component. 03:46.770 --> 03:52.290 And if you are not sure, then try with the cathode mode like this and then make the code, make the 03:52.290 --> 03:53.340 experimentation. 03:53.340 --> 03:58.710 And if it doesn't work, then try to plug this to five volts and see if that works. 03:58.920 --> 03:59.400 All right. 03:59.400 --> 04:05.640 And now for each of the colors here, I'm going to add a resistor. 04:06.210 --> 04:16.980 So resistor let's add a resistor here between, for example, the red and a digital pin here. 04:16.980 --> 04:22.740 And we are going to use a 220 ohm resistor. 04:24.010 --> 04:24.220 Okay. 04:24.220 --> 04:31.090 You can see here the color is red, red and brown for a four band resistor. 04:31.180 --> 04:36.130 If you have a five band resistor that's going to be red, red and then black and black. 04:36.430 --> 04:36.640 Okay. 04:36.640 --> 04:44.830 And I'm going to here connect this to digital PIN number 11 on the Arduino Uno. 04:45.220 --> 04:47.470 So let's change the color, actually. 04:48.980 --> 04:49.910 Let's use. 04:49.940 --> 04:51.300 Well, let's use orange. 04:51.320 --> 04:51.860 Okay. 04:52.190 --> 04:55.760 Let's avoid black and red. 04:55.760 --> 05:00.230 And I'm going to copy this here and copy this here. 05:00.920 --> 05:05.750 I'm going to connect the blue line to pin ten. 05:07.640 --> 05:10.790 Well, let's put it blue so it's easier to recognize it. 05:10.790 --> 05:12.200 And the green. 05:13.080 --> 05:13.890 To. 05:15.760 --> 05:18.460 In nine and let's put it green. 05:18.580 --> 05:19.330 Also. 05:20.020 --> 05:20.410 All right. 05:20.410 --> 05:22.900 And the circuit is done. 05:23.980 --> 05:31.210 So one thing that is very important is to make sure that you connect the three LEDs or the three legs 05:31.510 --> 05:39.780 of the Led to pins where you have a tilde here, as you can see, so that you can use the functionality. 05:39.910 --> 05:42.940 Okay, because we are going to use the analog write function. 05:42.940 --> 05:49.080 So here I have chosen 11, ten and nine, which are all compatible. 05:49.090 --> 05:53.260 But you can see, for example, on the Arduino Uno, we have also the six, the five and the three, 05:53.260 --> 05:56.170 and it may also depend on the board you have. 05:56.170 --> 05:58.930 So make sure you have functionality. 05:59.410 --> 06:02.560 And this is the real circuit with the RGB LEDs. 06:02.560 --> 06:03.550 So very important. 06:03.550 --> 06:09.640 First of all, before you do anything with the Arduino, just make sure to unplug your Arduino from 06:09.640 --> 06:10.450 the Raspberry Pi. 06:10.480 --> 06:14.260 So the Raspberry Pi is still power on, as you can see, the LEDs here. 06:14.260 --> 06:17.380 But we have pulled off the Arduino. 06:17.530 --> 06:17.920 Okay. 06:17.920 --> 06:22.690 And then you can see we have so here we have the red and the black wires. 06:22.720 --> 06:23.050 Okay. 06:23.050 --> 06:26.870 To make the common ground and the common five volt on the breadboard. 06:26.900 --> 06:29.060 I have plugged my RGB here. 06:29.330 --> 06:32.600 The longer leg is actually the second one on the left. 06:33.160 --> 06:38.980 So connect this to a ground line here with this small black wire. 06:38.980 --> 06:44.320 And then for each of the other legs, I have a 220 ohm resistor. 06:44.320 --> 06:49.840 And then this other part of the resistor goes to a digital pin here. 06:49.870 --> 06:50.080 Okay. 06:50.080 --> 06:51.790 This one is actually out. 06:51.820 --> 06:52.900 Let's put it in. 06:53.380 --> 06:57.910 And you can see I have connected from PIN 11, ten and nine. 06:58.030 --> 07:05.620 And one difference from the Tinkercad simulation is that here my colors are actually red, green and 07:05.620 --> 07:05.950 blue. 07:05.980 --> 07:06.220 Okay. 07:06.220 --> 07:06.850 How to know that? 07:06.850 --> 07:09.670 Well, I have just made some experimentations. 07:09.880 --> 07:14.320 So I have used a wire which is white, green and blue. 07:14.530 --> 07:14.800 Okay. 07:14.800 --> 07:18.240 Just for the three colors, it doesn't really matter the color of the wires. 07:18.250 --> 07:18.430 Okay? 07:18.430 --> 07:19.570 It's just to give you some. 07:19.570 --> 07:23.980 Maybe some indication so you don't make more mistakes in the future. 07:24.250 --> 07:24.700 All right. 07:24.700 --> 07:27.190 So you can see that the circuit.