1 00:00:00,120 --> 00:00:06,840 Hi and welcome to a new section in this course, what we do in this section is we'll start the implementation 2 00:00:06,840 --> 00:00:12,000 of the terrorism controller and we'll do that step by step. 3 00:00:12,000 --> 00:00:20,490 That is, as usual with my courses will create a series of prototypes and in each prototype or implement 4 00:00:20,490 --> 00:00:25,590 and test a new set of functionalities of capabilities. 5 00:00:26,190 --> 00:00:32,090 So this is the first step towards building our terrarium controller. 6 00:00:32,430 --> 00:00:38,820 I've decided that instead of going straight into the PCB will stop, we start our prototyping process 7 00:00:38,820 --> 00:00:40,820 the usual way on a breadboard. 8 00:00:41,250 --> 00:00:47,580 You could go and start working on a small or a mini breadboard. 9 00:00:47,670 --> 00:00:50,030 The circuit here so you can see is fairly small. 10 00:00:50,310 --> 00:00:55,710 But keep in mind that things are going to get a little bit more complicated and will be adding components 11 00:00:55,710 --> 00:00:56,390 on the breadboard. 12 00:00:56,400 --> 00:00:58,390 So this is probably not going to be enough. 13 00:00:59,010 --> 00:01:08,670 You can and I have actually done so using multiple breadboard, multiple mini inputs, so you can put 14 00:01:08,670 --> 00:01:14,370 them side by side and then attach components on them and join them together using jumper wires. 15 00:01:14,670 --> 00:01:18,630 Or you can instead go for a larger Bridport like this. 16 00:01:19,030 --> 00:01:23,550 Also, what I like about this breadboard is that it's got the banana connectors for external power on 17 00:01:23,550 --> 00:01:27,180 the side in the first few iterations. 18 00:01:27,180 --> 00:01:35,040 Are we powering my motor, which represents the pump through these banana clips? 19 00:01:35,040 --> 00:01:40,740 And then why is it go to my benchtop power supply? 20 00:01:41,760 --> 00:01:47,360 And then of course I'm powering the E.S.P 32 via USB, so that allows me to have two rails. 21 00:01:47,370 --> 00:01:53,520 This one is going to be for the motor power and then the rest of the rails to dedicated to sensors in 22 00:01:53,520 --> 00:01:54,960 the spirit to itself. 23 00:01:54,990 --> 00:02:00,390 So in this first lecture of the first section, I just want to show you a review of what it is that 24 00:02:00,390 --> 00:02:06,000 we are targeting, what it is that will implement by the end of this section, both in terms of the 25 00:02:06,000 --> 00:02:13,170 hardware and the software and then in the remaining lectures in this section will do the implementation 26 00:02:13,170 --> 00:02:13,890 and testing. 27 00:02:14,460 --> 00:02:20,490 So hardware wise, what we have just from a high level perspective and I'll show you the actual schematic 28 00:02:20,490 --> 00:02:28,200 in the next lecture, it's just a very, very basic features that this terrorism controller without 29 00:02:28,200 --> 00:02:30,450 these features would not be a terrorism controller. 30 00:02:30,720 --> 00:02:34,590 We can add more capabilities later, but this is where it starts. 31 00:02:34,980 --> 00:02:39,180 So I've got the motor here, which represents the actual pump. 32 00:02:39,610 --> 00:02:48,180 I did not want to have a jug of water like a water reservoir with soil in a jar with soil and the plant 33 00:02:48,180 --> 00:02:55,170 in it on my bench as I'm trying to figure out the various electrical connections and the nutrient flow. 34 00:02:55,410 --> 00:03:05,910 So instead of having the actual water pump submerged in water, I've got a five old Holby modem in terms 35 00:03:05,910 --> 00:03:12,780 of the soil sensor, again, another essential component of the terrarium controller, so that the soil 36 00:03:12,780 --> 00:03:16,500 since the soil humidity sensor looks like this. 37 00:03:16,500 --> 00:03:21,780 And again, for this to work properly, it needs to be inside soil. 38 00:03:22,770 --> 00:03:30,810 And I thought that this is just a simple voltage divider, really, this module here, simply an amplifier. 39 00:03:31,230 --> 00:03:39,260 So I could easily simulate, in a way, the soil humidity sensor using this potential mirror. 40 00:03:39,810 --> 00:03:47,130 So when the time comes and I'm ready to test the real thing, I will simply remove the potential and 41 00:03:47,130 --> 00:03:49,920 replace it with the soil humidity sensor. 42 00:03:50,050 --> 00:03:51,210 It's got for pinch here. 43 00:03:51,210 --> 00:03:54,000 But really the three pins are the ones that are used. 44 00:03:54,720 --> 00:04:00,390 I'll be using the analog pin on the left side, which plays the role of the consumer, a middle pin, 45 00:04:00,660 --> 00:04:05,910 and then you've got ground in five or three point three boards for the ease with the two of power. 46 00:04:06,660 --> 00:04:08,040 So put it aside for now. 47 00:04:08,310 --> 00:04:11,820 Put the consumer back in right there. 48 00:04:12,810 --> 00:04:19,530 And I've got the motor control circuit here, which is based on the tip one twenty two and that's about 49 00:04:19,530 --> 00:04:19,770 it. 50 00:04:19,860 --> 00:04:26,790 Now, as I said, I'm going to show you the circuit diagram in the next lecture in terms of the software 51 00:04:27,840 --> 00:04:36,330 that all that we're going to do is to build a node red flow, which will present us with this dashboard 52 00:04:36,570 --> 00:04:45,960 so he can see, yes, I'm moving the nub of the potential mirror the soil humidity indicator changes 53 00:04:45,960 --> 00:04:46,770 accordingly. 54 00:04:51,200 --> 00:04:57,950 And back to zero gets to the range near zero to one thousand and twenty three, because that's the resolution 55 00:04:57,950 --> 00:05:02,870 of the unlooked input pin that I will implement in my sketch. 56 00:05:03,410 --> 00:05:11,300 I also have a switch here so that I could manually control the motor and I can turn it on or off. 57 00:05:11,310 --> 00:05:19,160 But of course, in my flow, I'm going to have a function here that will trigger the pump on its own. 58 00:05:19,430 --> 00:05:24,680 If the soil humidity, the real value of the solar humidity goes above a certain value. 59 00:05:24,950 --> 00:05:30,440 And I'm going to decide what the value is by playing around with it, with the geometry. 60 00:05:31,280 --> 00:05:31,780 All right. 61 00:05:32,060 --> 00:05:37,090 So that gives you an introduction of what it is that we'll be doing in this section. 62 00:05:37,100 --> 00:05:40,730 So let's move on to the next lecture and start building it.