1 00:00:00,180 --> 00:00:06,630 So you've already seen the schematic that makes up the circuit for the terrorism controller and I've 2 00:00:06,630 --> 00:00:12,480 also shown you how to implement it using a mini breadboard or a larger sized breadboard. 3 00:00:12,780 --> 00:00:16,230 Now let's have a look at the PC version of the same circuit. 4 00:00:16,770 --> 00:00:25,530 So here in Kickout, switch over to BCB New and the PC be for this circuit looks, I guess it's almost 5 00:00:25,530 --> 00:00:27,080 a perfect rectangle. 6 00:00:27,090 --> 00:00:30,750 So it's a shape that I think makes it easy to create a box. 7 00:00:31,050 --> 00:00:34,380 So I wanted to go for this shape in the middle. 8 00:00:34,600 --> 00:00:38,850 It's going to clean up a few things, actually show you the 3D version. 9 00:00:40,310 --> 00:00:49,510 The 3D view of the PCB looks like this in the middle of the bay, of all of the components that the 10 00:00:49,510 --> 00:00:56,380 user will not have to interact with, and as you'll see in a minute, that the ESB 32 deficit will be 11 00:00:56,380 --> 00:01:01,930 on its head and will cover all of these resistors, capacitors in the tip, 122, of course, a tip 12 00:01:01,930 --> 00:01:02,890 122. 13 00:01:03,430 --> 00:01:08,740 You can bend its pins down so that it's flat on the PSP. 14 00:01:09,070 --> 00:01:16,660 They won't be taking any space down the bottom of got the input of the barrel connector for External 15 00:01:16,660 --> 00:01:25,590 Power, the connector for the DHT 22 with a long wires and then the battery and the pump motor crude 16 00:01:25,660 --> 00:01:26,740 terminals as well. 17 00:01:27,110 --> 00:01:33,310 And on the other side of the indicator, the jumpers, so that we can get the appropriate voltage to 18 00:01:33,310 --> 00:01:34,750 measure for the MCU. 19 00:01:35,080 --> 00:01:38,590 And the moisture sensor is plugged in here. 20 00:01:38,600 --> 00:01:46,270 The only difference from what you see in this 3D representation versus the actual one is that this connector 21 00:01:46,270 --> 00:01:49,030 is a female header on the other side. 22 00:01:49,040 --> 00:01:52,290 I've got instructions on how to use the compass here. 23 00:01:52,900 --> 00:01:56,620 Let's have a look at the actual PSP now on my bench. 24 00:01:56,920 --> 00:02:03,850 So here's the implementation of the circuit in the form of a PC B and looks like this. 25 00:02:06,390 --> 00:02:12,570 It's quite almost a rectangular sibiya, having designed a case for it yet, but will be doing so as 26 00:02:12,570 --> 00:02:14,230 well as you can see it again. 27 00:02:14,280 --> 00:02:19,470 So we're seeing the first part of this lecture is that they decided to put all of the linear components 28 00:02:19,470 --> 00:02:22,740 are basically the things that the user would not be interacting with in the middle. 29 00:02:23,100 --> 00:02:31,680 And then I've got the two headers along the sides where I can mount the EU, the two with three pins 30 00:02:31,680 --> 00:02:40,560 on it, and the rest are just inputs and outputs for the indicators of the header for the moisture sensor, 31 00:02:40,920 --> 00:02:48,720 the barrel jack here for power input, the jumpers and the screw terminals for the motor and its battery. 32 00:02:49,050 --> 00:02:54,540 And also should point out that the schematic and the PITIABLY implementation and design that I showed 33 00:02:54,540 --> 00:02:57,420 you in the first part of this lecture is version two. 34 00:02:57,630 --> 00:02:58,560 This is vision one. 35 00:02:58,560 --> 00:03:00,660 And I haven't got version two yet. 36 00:03:00,840 --> 00:03:06,720 The main difference between version one and version two is that in version two, I've also got provision 37 00:03:06,720 --> 00:03:09,870 for the DHT 22 cents. 38 00:03:09,870 --> 00:03:12,420 I've got an additional screw terminal for that. 39 00:03:13,080 --> 00:03:13,470 All right. 40 00:03:13,980 --> 00:03:21,220 Now let's have a look at the version of the bill with the components attached to it in populated areas. 41 00:03:21,350 --> 00:03:25,100 They can see in the middle of code or the linear components. 42 00:03:25,240 --> 00:03:31,200 There is the tip 122 nicely fitting in the space available for it. 43 00:03:31,510 --> 00:03:35,790 I've got the resistors and the diet here for the motor on the other side. 44 00:03:36,180 --> 00:03:42,420 And then my thirty eight pin is P 32 module fits just nicely on it. 45 00:03:42,450 --> 00:03:49,470 You can see that of course the jumper wire, this is the, the sensor that did twenty two cents. 46 00:03:49,470 --> 00:03:55,800 So I had to do a hack here because this is version one is a set and at that point I had not decided 47 00:03:55,800 --> 00:03:57,300 to use it due to twenty two. 48 00:03:57,540 --> 00:04:07,890 And I decided that a little later after I decided to include it to the 22 sensor, I redesigned or altered 49 00:04:07,890 --> 00:04:15,360 the board so that its screw terminal three pens would go down here where now we've got the IS and then 50 00:04:15,360 --> 00:04:17,430 I move the jumpers up on the top side. 51 00:04:17,430 --> 00:04:23,340 And that allowed me to actually make everything fit without changing the dimensions of the board in 52 00:04:23,340 --> 00:04:24,240 this implementation. 53 00:04:24,240 --> 00:04:28,410 I'm simply going to attach my board right there. 54 00:04:30,700 --> 00:04:35,550 Gently, without moving any of the wires right out. 55 00:04:37,120 --> 00:04:38,230 Snaps in place. 56 00:04:43,810 --> 00:04:44,930 It looks like this. 57 00:04:51,880 --> 00:04:55,810 I remove that temporarily so that I can stop that one, just kill. 58 00:04:58,950 --> 00:05:00,960 OK, and then the sensor goes back on. 59 00:05:05,410 --> 00:05:06,070 And. 60 00:05:07,880 --> 00:05:11,750 Put the phone back on to this terminal here to 22. 61 00:05:11,870 --> 00:05:14,480 All right, so it's a little hack, but it works. 62 00:05:14,520 --> 00:05:20,770 Now, I'm going to redo this once I receive the Bisbee's from BCB way on the motor. 63 00:05:20,780 --> 00:05:27,740 I have attached a large capacitor to use as bypass, just providing a little bit of extra power when 64 00:05:27,740 --> 00:05:29,230 the motor starts to spin. 65 00:05:29,900 --> 00:05:37,790 And then on the other side, I have also saw that a smaller ceramic capacitor to help me with noise 66 00:05:38,600 --> 00:05:40,760 so that we don't have too much interference. 67 00:05:41,000 --> 00:05:47,930 I discovered by testing that when the motor spins, especially this one, not the actual pump, it's 68 00:05:47,930 --> 00:05:55,010 a little smaller, but this one when it spins, I discovered that it was causing interference to the 69 00:05:55,010 --> 00:05:57,920 DC 22 sensor so it wasn't able to take readings out of it. 70 00:05:58,430 --> 00:06:03,190 So that's why I attached this ceramic capacitor. 71 00:06:03,200 --> 00:06:05,720 It helps with a noise on the data line. 72 00:06:07,430 --> 00:06:07,760 All right. 73 00:06:07,770 --> 00:06:10,690 So that's all there is about the pitcher beer. 74 00:06:10,700 --> 00:06:14,270 I'm going to plug it in now to show you how it works, so. 75 00:06:15,860 --> 00:06:18,420 You go, it's up and running. 76 00:06:18,560 --> 00:06:25,700 Now, let's say that the soil needs a bit of moisture. 77 00:06:25,760 --> 00:06:34,940 So if the soil humidity drops below a certain level that I have already programmed in our note read, 78 00:06:35,750 --> 00:06:36,770 I'm going to simulate that. 79 00:06:36,770 --> 00:06:43,820 But simply taking the sensor out of the soil back about half until the motor begins to spin. 80 00:06:50,100 --> 00:06:51,510 For the sense of back into the soil. 81 00:06:53,220 --> 00:07:00,390 It's gone above a threshold, so actually that the reading dropped below the threshold, so the motor 82 00:07:00,540 --> 00:07:02,730 stopped spinning, couldn't take it out again. 83 00:07:04,940 --> 00:07:09,470 The motor starts simulating water now going back into. 84 00:07:10,420 --> 00:07:11,320 The terrarium. 85 00:07:17,160 --> 00:07:24,580 All right, so the motor will operate for up to five seconds before a new value is read and then evaluated 86 00:07:24,960 --> 00:07:28,920 to decide whether the pump should continue to operate for a bit longer. 87 00:07:30,350 --> 00:07:35,250 I also want to show you what the water pump looks like and how it works. 88 00:07:35,780 --> 00:07:38,000 So this is a submersible water pump. 89 00:07:38,180 --> 00:07:39,980 It operates at around five votes. 90 00:07:39,980 --> 00:07:42,730 It can go up to maybe nine without any issues. 91 00:07:42,950 --> 00:07:48,320 And of course, the more voltage she can provide, the faster the motor inside this pump spins to, 92 00:07:48,320 --> 00:07:52,410 the more volume of water it can move around this part here. 93 00:07:52,430 --> 00:07:55,850 This is the intake and this is where the water comes out of. 94 00:07:56,210 --> 00:07:59,720 And you just need to connect it to a hose like this. 95 00:07:59,750 --> 00:08:06,500 You can purchase this online to the length that you want and attach it to the outlet. 96 00:08:06,890 --> 00:08:17,900 Then you just submerge the pump into the water reserve while the lead is not that long and you will 97 00:08:17,900 --> 00:08:27,320 need to extend it, which is what I've done here so that you don't have to have your baby directly next 98 00:08:27,320 --> 00:08:29,470 to the pump and the water reservoir. 99 00:08:30,500 --> 00:08:32,900 So I'm going to give you a little demonstration. 100 00:08:32,900 --> 00:08:38,860 I have connected the pump to my battery power supply. 101 00:08:38,990 --> 00:08:41,270 That's just six votes in here. 102 00:08:41,540 --> 00:08:46,750 There are four batteries alkaline, so that gives me about six votes when they're fully charged and 103 00:08:46,760 --> 00:08:47,660 fresh batteries. 104 00:08:48,440 --> 00:08:49,520 I'm going to switch it off. 105 00:08:49,880 --> 00:08:56,250 Normally, I would put the hose into the terrarium, but of course, it's already water and that would 106 00:08:56,280 --> 00:08:56,840 flooded. 107 00:08:56,960 --> 00:09:02,320 So I'm going to recycle the water back into the job that contains it. 108 00:09:03,170 --> 00:09:06,920 So I'll switch it on and there's a water coming out. 109 00:09:07,490 --> 00:09:12,320 The sequence is quite a bit of volume there. 110 00:09:12,320 --> 00:09:13,760 There's a lot of water coming out. 111 00:09:13,760 --> 00:09:18,230 And that's why you need to be very careful when you're actually experimenting and working with this 112 00:09:18,230 --> 00:09:27,560 to to make sure that the pump is turned off even in case where, for example, you lose power in your 113 00:09:28,460 --> 00:09:34,220 in your controller or there is no communication between the controller and no read. 114 00:09:34,460 --> 00:09:39,560 And in my sketch for the SB 32, I've got a failsafe way. 115 00:09:39,560 --> 00:09:44,360 If there's no communication after five seconds, then the pump will automatically turn off. 116 00:09:45,320 --> 00:09:46,490 So you go. 117 00:09:46,520 --> 00:09:48,170 This is all there is to it. 118 00:09:48,380 --> 00:09:56,720 Normally, once the testing and prototyping phase is finished, you will connect the wires, the power, 119 00:09:57,050 --> 00:10:00,770 the pump directly to your PC. 120 00:10:00,770 --> 00:10:03,860 Be where right now I've got the motor connected to.