WEBVTT 00:00.050 --> 00:03.260 Let's now add two more LEDs to our circuits. 00:03.260 --> 00:06.470 So now the circuits will have three LEDs and one push button. 00:06.470 --> 00:11.510 And we will be able to practice on more interesting stuff with Python and the Raspberry Pi. 00:11.510 --> 00:13.430 So here I'm back to the software and I have. 00:13.430 --> 00:16.820 So I have a green LED and a blue LED. 00:17.120 --> 00:18.410 It doesn't really matter. 00:18.410 --> 00:23.990 You can choose any color you want okay I'm just using three different colors, but just pick the whatever 00:23.990 --> 00:26.120 LED that it's available for you. 00:26.120 --> 00:29.720 And on top of that I also have one kilo ohm resistor. 00:29.720 --> 00:31.910 So I have one for each LED. 00:31.910 --> 00:36.830 And the circuit is basically going to be the same for the three LEDs. 00:36.830 --> 00:41.960 So let's start for example with this blue LED I'm going to put it here somewhere here. 00:42.140 --> 00:47.870 And I will connect the shorter leg to the ground okay. 00:47.900 --> 00:50.480 So maybe just put it here so it looks nicer. 00:50.480 --> 00:52.070 And I connect to the ground. 00:52.070 --> 00:55.310 And this wire I'm going to set it to black okay. 00:55.340 --> 01:02.780 I'm gonna also place that one right now just right here for example, and connect the ground with the 01:02.780 --> 01:07.810 shorter leg, and we don't need to add anything else because the ground you can see is already connected 01:07.810 --> 01:08.950 to the Raspberry Pi. 01:08.980 --> 01:12.940 So this line is already fully connected to the ground. 01:12.970 --> 01:21.910 Then I will add my resistor on the longer leg of the LED here, and also on that one. 01:22.720 --> 01:25.930 And now which Gpio are we going to use. 01:25.960 --> 01:28.570 Well I have created this setup. 01:28.570 --> 01:30.550 So that is going to be quite easy for you. 01:30.580 --> 01:33.670 You see we are using the Gpio number 17 here. 01:33.670 --> 01:37.960 But then we have the Gpio number 27 and 22. 01:37.990 --> 01:40.660 So we're going to connect this blue LED here. 01:40.660 --> 01:50.020 So after the resistor we take this side of the resistor and we connect it to this Gpio number 27. 01:50.650 --> 01:55.600 I'm going to use for example I'm going to use the green cable because that's what I'm going to use for 01:55.600 --> 01:56.710 my real circuit. 01:56.740 --> 01:57.130 Okay. 01:57.130 --> 02:01.390 And I'm going to also make it look nicer for the image. 02:01.390 --> 02:09.300 And then I'm going to connect that side of the resistor here to this Gpio here number 22. 02:09.330 --> 02:13.950 And I have a white wire here. 02:14.220 --> 02:14.460 Okay. 02:14.460 --> 02:17.760 To match the one that I'm using for my circuit. 02:17.940 --> 02:19.440 And for example just like that. 02:19.470 --> 02:26.910 One thing to pay attention to here is that this pin here is actually a 3.3V pin. 02:26.910 --> 02:31.500 So this is a power pin which means pay attention to that don't power. 02:31.650 --> 02:35.970 So don't connect the LED to that 3.3V pin directly. 02:35.970 --> 02:40.170 So make sure that you use this Gpio 27 and 22. 02:40.200 --> 02:43.410 It's quite easy to find if you have correctly placed the ground here. 02:43.440 --> 02:49.320 It's just the well the first, second and third pin on the right for the three LEDs. 02:49.350 --> 02:49.920 All right. 02:49.920 --> 02:51.330 And the circuit is complete. 02:51.840 --> 02:53.550 And back to the real circuit. 02:53.550 --> 02:55.350 So I have shut down my Raspberry Pi. 02:55.380 --> 02:59.550 Of course I have taken out the power cable if needed. 02:59.550 --> 03:02.040 You remove the SD card if you don't have a case. 03:02.070 --> 03:02.610 Okay. 03:02.610 --> 03:04.920 And I'm gonna start with my. 03:05.190 --> 03:10.680 So I have my two LEDs here green, green and blue. 03:10.770 --> 03:14.040 I'm going to put so pay attention here. 03:14.040 --> 03:17.520 You see we have a shorter leg. 03:17.520 --> 03:19.980 So the shorter leg is going to go to the ground. 03:19.980 --> 03:23.100 So I can do the same thing I did for the red LEDs. 03:23.100 --> 03:30.150 For example, I connect here shorter leg to the ground and the longer one to another column. 03:30.840 --> 03:34.500 I do the same thing for the green LED. 03:34.590 --> 03:42.630 So shorter leg here goes to the ground and then the other one goes to another column. 03:43.050 --> 03:46.020 I take now my two resistors. 03:47.160 --> 03:56.670 Okay so the one kilo ohm resistors one goes here on that side of the LED to another. 03:56.670 --> 03:59.100 I'm going to choose here for example whatever. 03:59.250 --> 04:01.230 So to another column. 04:01.230 --> 04:05.430 And I do the same for that one okay. 04:05.460 --> 04:09.540 Make sure it's on the same column as the longer leg of the LED. 04:09.540 --> 04:12.530 And the other one can be right here. 04:13.010 --> 04:13.730 Okay. 04:14.450 --> 04:16.310 And then I'm going to take my. 04:16.340 --> 04:18.020 So I have a green cable here. 04:18.050 --> 04:21.890 That is a male to female okay. 04:21.920 --> 04:33.020 That I'm going to plug between that leg of the resistor here to the pin that's directly on the right 04:33.020 --> 04:34.310 of the first LED. 04:34.310 --> 04:39.050 So I don't really I can't really make any mistake here if it's correctly placed already. 04:39.920 --> 04:50.390 And then I take my last wire, which is another male to female that I plug between that LED and between 04:50.420 --> 04:52.730 that pin right here on the right. 04:53.420 --> 04:59.630 So now you can see I have my ground and then I have the yellow, the green and the white cables. 04:59.660 --> 04:59.930 Okay. 04:59.960 --> 05:01.070 And the circuit is complete. 05:01.070 --> 05:07.400 So you see after you know how to put one led if you need to put more LEDs, it's really simple. 05:07.400 --> 05:12.650 And now you can power on the Raspberry Pi again and connect to the desktop. 05:12.650 --> 05:15.500 And Tony to write more Python code.