WEBVTT 00:00.080 --> 00:03.500 And let's add the Pir sensor to our circuit. 00:03.500 --> 00:06.230 So for now we have the three LEDs and one push button. 00:06.230 --> 00:14.570 We are going to add this Pir sensor and also one resistor that's also going to be one kilo ohm resistor 00:14.600 --> 00:15.080 okay. 00:15.110 --> 00:17.960 So I'm going to put my sensor here on the left for now. 00:17.960 --> 00:20.090 And you see we have three pins. 00:20.090 --> 00:22.880 So when the sensor here this is on. 00:22.910 --> 00:24.830 So the sensor is on the top of the board. 00:24.830 --> 00:28.790 You see the one on the left here is going to be ground. 00:28.790 --> 00:33.680 So the first thing we do is we connect the ground with the ground of our circuit. 00:33.680 --> 00:35.330 So I'm going to do this. 00:35.360 --> 00:40.460 And then what I'm going to plug it here for example okay. 00:40.490 --> 00:44.270 And again I'm going to make it look nicer for the image. 00:44.270 --> 00:46.160 So I put it in black. 00:46.910 --> 00:47.270 All right. 00:47.300 --> 00:51.710 You can see I can plug the ground anywhere in the ground line okay. 00:51.740 --> 00:55.400 Because as you know everything here is connected. 00:56.420 --> 00:59.180 Then we have so we have three pins. 00:59.180 --> 01:02.300 We have the data pin that we're going to plug to a Gpio here. 01:02.300 --> 01:06.680 But then we have on the right we have a VCC pin. 01:06.680 --> 01:09.170 So we need to power these components. 01:09.200 --> 01:09.410 Okay. 01:09.440 --> 01:13.220 We need to connect it directly to a power source. 01:13.220 --> 01:19.790 And the precision is that this component is actually powered by five volt. 01:19.820 --> 01:20.240 Okay. 01:20.270 --> 01:25.640 So we will connect this to a five volt pin in the Raspberry Pi. 01:25.640 --> 01:29.150 And you can see here we have two five volt pins. 01:29.180 --> 01:33.620 Okay so on the image as well you can see that we have two five volt. 01:33.650 --> 01:33.860 Okay. 01:33.890 --> 01:37.250 So all the pins on the Raspberry Pi here are 3.3V. 01:37.250 --> 01:40.100 But those two here are five volts. 01:40.100 --> 01:42.290 So you can connect to any of those pins. 01:42.290 --> 01:45.530 So for example the first one and make sure you connect to that one. 01:45.530 --> 01:48.890 And I'm going to use a red wire here. 01:48.890 --> 01:52.130 So red for power. 01:52.160 --> 01:56.720 Let's make it look a bit nicer maybe like that. 02:00.080 --> 02:04.400 And actually well as you know we can connect the ground to anything. 02:04.400 --> 02:06.670 So maybe I can just do that here. 02:07.450 --> 02:15.640 As you see here, I can just connect this one here just to show you that we can do any configuration 02:15.640 --> 02:16.780 for the ground here. 02:17.080 --> 02:18.490 It's just going to be the same. 02:20.290 --> 02:20.680 Okay. 02:20.710 --> 02:23.530 For example, that looks better. 02:23.530 --> 02:25.180 And this is the same thing okay. 02:25.210 --> 02:32.920 And now that we have the ground connected to the whole circuit and the five volt here power for the 02:32.920 --> 02:36.040 component, we can connect this output. 02:36.040 --> 02:38.740 So that's the data pin to a Gpio okay. 02:38.770 --> 02:44.650 So very important distinction here is that the Gpio here this output is 3.3V. 02:44.650 --> 02:49.480 But the voltage you give to the component for the VCC is five volt okay. 02:49.510 --> 02:51.850 Then it's going to handle everything by itself. 02:51.850 --> 02:55.930 But the again the Gpio here is going to be 3.3V. 02:55.930 --> 02:57.610 So the data pin is 3.3V. 02:57.610 --> 02:59.200 But the power pin is five volts. 02:59.200 --> 03:01.090 So that's the important difference. 03:01.090 --> 03:05.380 And what we could do is we could directly plug this to a Gpio. 03:05.380 --> 03:07.570 But I'm going to add a resistor. 03:07.570 --> 03:09.040 So this one kilo ohm resistor. 03:09.070 --> 03:14.230 Just like I did for the push button so that we can reduce a bit the current. 03:14.230 --> 03:19.240 And what I'm going to do is, well, you see we haven't used any of those dots here. 03:19.240 --> 03:23.170 So I'm just going to plug my resistor for example right here. 03:23.470 --> 03:29.290 And then I'm going to plug this wire to one leg of the resistor. 03:29.320 --> 03:34.570 And I'm going to choose for example a what color do we have. 03:34.600 --> 03:35.350 Brown. 03:37.900 --> 03:38.380 Okay. 03:38.380 --> 03:42.310 So for example like that and this here. 03:44.650 --> 03:45.100 Okay. 03:45.130 --> 03:47.680 And the other side of the resistor okay. 03:47.710 --> 03:52.450 So the connection starts here from the component to the resistor going through the resistor. 03:52.450 --> 03:56.470 And the other side of the resistor is going to go to the Gpio here. 03:56.500 --> 03:57.760 Number four. 03:58.360 --> 04:01.630 That's just on the left of the ground okay. 04:01.660 --> 04:05.710 So you see if you have correctly placed the ground then on the right you have these three LEDs. 04:05.710 --> 04:08.260 And on the left you have the Pir sensor. 04:08.440 --> 04:12.630 And I'm just going to make it look a bit nicer. 04:12.660 --> 04:13.320 Okay. 04:13.380 --> 04:16.530 And with this, the circuit is now complete. 04:16.530 --> 04:19.800 So we don't plug directly this component on the breadboard. 04:19.830 --> 04:20.280 Okay. 04:20.310 --> 04:22.500 We just plug here the ground. 04:22.500 --> 04:24.780 Then the power supply goes to five volts. 04:24.810 --> 04:25.410 This one. 04:25.410 --> 04:32.220 And then we have the data pin that goes through the resistor one kilo ohm resistor to the Gpio number 04:32.220 --> 04:35.400 four which is just next to the ground. 04:35.430 --> 04:35.910 All right. 04:35.910 --> 04:38.580 And now let's switch to the real circuit. 04:39.750 --> 04:43.650 And so of course as always make sure that you power off the Raspberry Pi if needed. 04:43.650 --> 04:45.930 You take the SD card out. 04:45.960 --> 04:47.700 With this case it's going to be fine. 04:47.700 --> 04:50.340 So I have my pi sensor okay. 04:50.340 --> 04:51.750 And I'm going to use. 04:51.750 --> 04:57.150 So here I'm going to use a male to female wire for the ground. 04:57.180 --> 05:01.710 As you can see I'm not using a black one because well simply I didn't have a black one at this time. 05:01.710 --> 05:06.960 And just to show you that if you are missing a black wire for the ground, well, it's okay. 05:06.960 --> 05:09.570 You don't need to go to the shop and buy a new one right now. 05:09.600 --> 05:11.250 You can use another wire. 05:11.280 --> 05:11.700 Okay? 05:11.730 --> 05:16.620 Nothing's going to happen as long as you make sure that you know which wire is going where. 05:17.280 --> 05:20.100 So we have the sensor like this. 05:20.130 --> 05:20.610 Okay. 05:20.640 --> 05:25.290 And the ground is going to be the first on the left so I can plug the ground here. 05:26.100 --> 05:26.640 Okay. 05:26.640 --> 05:29.430 So if you put it like this, you see you have the jumper on the left. 05:29.430 --> 05:31.920 And the ground also is going to be on the left side. 05:32.880 --> 05:35.160 So first of all I'm going to just plug the three wires. 05:35.160 --> 05:40.920 And then we're going to put the wires in the right place for the power supply. 05:40.950 --> 05:46.950 Also you will need a female to female wire and better to have a red one. 05:46.950 --> 05:49.680 But as you can see I also don't have a red one like this. 05:49.680 --> 05:54.780 So I just use the white one and I'm going to plug it to the other side here. 05:55.230 --> 05:55.890 Okay. 05:55.890 --> 05:59.130 And finally I have a brown cable. 05:59.130 --> 06:04.530 So I'm going to take male to female and plug it in the middle. 06:06.090 --> 06:09.870 So here I plug it in the middle right. 06:09.870 --> 06:14.670 We have the power that is fully connected. 06:14.670 --> 06:16.440 Now we need to connect those three wires. 06:16.440 --> 06:17.730 So the gray one. 06:17.760 --> 06:20.040 So the gray one here are the black one. 06:20.040 --> 06:24.720 Well the ground here that goes here on the ground line. 06:24.840 --> 06:25.080 Okay. 06:25.080 --> 06:27.900 So any pin will do. 06:27.930 --> 06:30.210 Just make sure you connect it on the ground line. 06:30.210 --> 06:33.120 Then the power pin. 06:33.150 --> 06:34.200 That's five volts. 06:34.200 --> 06:34.920 So five volts. 06:34.920 --> 06:39.810 We connect it to the first one on the top left. 06:40.200 --> 06:45.120 It should be easy to find and make sure you connect to the right one because we need five volts. 06:46.050 --> 06:49.230 So the top left corner the first pin. 06:50.220 --> 06:54.120 And then I'm going to connect this data wire here. 06:54.120 --> 07:02.970 So the one that goes to the Gpio I'm going to connect it to any part here for example that one okay. 07:03.480 --> 07:10.320 So here I can take my one kilo ohm resistor and plug it. 07:10.320 --> 07:16.290 So maybe I will do that here and plug this here okay. 07:16.320 --> 07:17.340 It doesn't really matter here. 07:17.340 --> 07:18.800 We have lots of space. 07:19.190 --> 07:20.930 You can take all the space you want. 07:20.960 --> 07:27.710 Just make sure you see, I make sure that I place my components as far as possible from the other ones. 07:27.710 --> 07:34.250 Because if you put this resistor too close to that one, and if they touch each other, well, bad things 07:34.250 --> 07:35.000 can happen. 07:35.000 --> 07:39.080 And now I have my so wire that goes through the resistor. 07:39.080 --> 07:45.440 And then I take the other leg of the resistor here on that side and make sure it's the right one. 07:45.440 --> 07:53.120 And I plug it to the Gpio number four which is on the left directly off the ground that we have plugged 07:53.120 --> 07:54.020 before. 07:55.580 --> 07:56.090 Okay. 07:56.660 --> 08:04.010 So that should be the fourth pin on the bottom left here of the Gpio panel. 08:04.760 --> 08:05.360 All right. 08:05.360 --> 08:08.150 And with this so the circuit is finished. 08:08.150 --> 08:11.840 And I have put it here on the left just on purpose. 08:11.840 --> 08:15.230 So that you see I can put it like that. 08:15.620 --> 08:21.110 And then I can detect movement on this side of the desk or the side of the room.