1 00:00:07,000 --> 00:00:20,000 Friends, today I just show you how to digitally generate a signal using any DAC devices. 2 00:00:20,000 --> 00:00:27,000 So over here, as you see, this is my National Instruments 6001 DAC card. 3 00:00:27,000 --> 00:00:33,000 As you see over here, these are my analog pin. 4 00:00:33,000 --> 00:00:37,000 A stands for analog Pin analog input. 5 00:00:37,000 --> 00:00:41,000 A0 stands for analog output as you see over here zero and one. 6 00:00:41,000 --> 00:00:44,000 Two analog output ports are there. 7 00:00:44,000 --> 00:00:50,000 Using the datasheet of this DAC card you can find out how many analog pins are there. 8 00:00:50,000 --> 00:00:53,000 How many analog output pins are there? 9 00:00:53,000 --> 00:00:55,000 How many analog input pins are there? 10 00:00:55,000 --> 00:01:04,000 So on the other side, as you see over here, there is a d I o digital input output pins. 11 00:01:04,000 --> 00:01:17,000 You can use these digital pins as an input or as a output means let's say in the port 0PO dot x port 12 00:01:17,000 --> 00:01:19,000 zero pin zero. 13 00:01:19,000 --> 00:01:24,000 You can configure it as a input or you can configure it as a output. 14 00:01:24,000 --> 00:01:25,000 Okay. 15 00:01:25,000 --> 00:01:36,000 So first I just generate a digital signal using Matlab Data Acquisition Toolbox with the help of this 16 00:01:36,000 --> 00:01:37,000 DAC card. 17 00:01:37,000 --> 00:01:43,000 So first I just need to connect this device with my PC. 18 00:01:43,000 --> 00:01:49,000 So first I just show you in the Measurement and Automation Explorer. 19 00:01:49,000 --> 00:01:57,000 As you see over here, there is a broken arrow on the device USB 6001 when I just connect this device. 20 00:02:00,000 --> 00:02:03,000 Over here it is now connected. 21 00:02:03,000 --> 00:02:05,000 So I just minimize this one. 22 00:02:05,000 --> 00:02:13,000 So you need to acquire or you need to program using Simulink. 23 00:02:13,000 --> 00:02:17,000 This is my Simulink window over here. 24 00:02:17,000 --> 00:02:20,000 I just need to generate a signal. 25 00:02:20,000 --> 00:02:32,000 So for that purpose I just drag I just show you how to generate a digital signal using National Instruments. 26 00:02:32,000 --> 00:02:33,000 Descartes. 27 00:02:33,000 --> 00:02:43,000 So over here, as you see, I just connect the pin number zero with the positive pin of the LED. 28 00:02:43,000 --> 00:02:48,000 And over here I have a ground that is black pin. 29 00:02:48,000 --> 00:02:51,000 I just connect it to the negative pin of the LED. 30 00:02:51,000 --> 00:03:00,000 I just use a breadboard as you see the long wire of the LED is my positive pin and shorter one is my 31 00:03:00,000 --> 00:03:02,000 negative pin. 32 00:03:02,000 --> 00:03:04,000 Okay, so over here. 33 00:03:04,000 --> 00:03:08,000 Otherwise you just check the substrate. 34 00:03:08,000 --> 00:03:15,000 The lesser part is my positive one and the higher one is my negative one. 35 00:03:15,000 --> 00:03:17,000 So I just connect. 36 00:03:18,000 --> 00:03:20,000 So this is the hardware connection. 37 00:03:21,000 --> 00:03:27,000 Now in the software part I just drag this little output pin. 38 00:03:28,000 --> 00:03:34,000 And inside this I just select port zero line zero as on the hardware. 39 00:03:35,000 --> 00:03:35,000 Okay. 40 00:03:35,000 --> 00:03:39,000 If you want to go with this one pin I just select this one. 41 00:03:39,000 --> 00:03:46,000 And on the hardware pin I just connect it to pin number 1 or 0. 42 00:03:46,000 --> 00:03:50,000 Right now, as you see, this one is pin number one. 43 00:03:50,000 --> 00:03:51,000 So let's. 44 00:03:54,000 --> 00:03:55,000 Apply it. 45 00:03:57,000 --> 00:04:02,000 Now I just need a signal generator. 46 00:04:02,000 --> 00:04:06,000 In the Matlab we just go with pulse generator. 47 00:04:08,000 --> 00:04:10,000 Pulse generator is there. 48 00:04:10,000 --> 00:04:17,000 I just drag it and connect it to the DAC block. 49 00:04:17,000 --> 00:04:21,000 Okay, so now I just need to run it. 50 00:04:22,000 --> 00:04:23,000 Let's check what happened. 51 00:04:23,000 --> 00:04:26,000 It generates some error, as you see. 52 00:04:26,000 --> 00:04:28,000 It will ask me. 53 00:04:28,000 --> 00:04:37,000 The output of this pulse generator is double means floating value, and that card require a boolean 54 00:04:37,000 --> 00:04:37,000 value. 55 00:04:37,000 --> 00:04:40,000 So we need a data converter over here. 56 00:04:41,000 --> 00:04:45,000 So data type conversion we require over here. 57 00:04:46,000 --> 00:04:49,000 So just click on it. 58 00:04:50,000 --> 00:04:55,000 You just need to change the output should be boolean. 59 00:04:55,000 --> 00:05:04,000 In this case, apply it okay, now delete this wire. 60 00:05:05,000 --> 00:05:09,000 Connect from here to here. 61 00:05:09,000 --> 00:05:14,000 Now it will convert the double data into boolean. 62 00:05:14,000 --> 00:05:24,000 Let's check what happened to it when I click over here as you see right now, it is running and it is 63 00:05:24,000 --> 00:05:28,000 blinking because this is a pulse on off, on, off. 64 00:05:28,000 --> 00:05:33,000 It will generate to the output side. 65 00:05:33,000 --> 00:05:33,000 Okay. 66 00:05:33,000 --> 00:05:35,000 So I just stop it. 67 00:05:35,000 --> 00:05:41,000 Let's check change some values inside this pulse. 68 00:05:41,000 --> 00:05:44,000 As you see there is a phase delay. 69 00:05:44,000 --> 00:05:45,000 There is a pulse width. 70 00:05:45,000 --> 00:05:49,000 Let's say I want to change it to 50%. 71 00:05:50,000 --> 00:06:00,000 Let's check what happened to it when it is 50% on off on off. 72 00:06:01,000 --> 00:06:05,000 Okay, let's check again. 73 00:06:05,000 --> 00:06:10,000 Change it to change the time. 74 00:06:12,000 --> 00:06:13,000 Time period. 75 00:06:13,000 --> 00:06:14,000 Let's say 100 seconds. 76 00:06:20,000 --> 00:06:21,000 Again. 77 00:06:21,000 --> 00:06:22,000 On. 78 00:06:22,000 --> 00:06:22,000 Off. 79 00:06:22,000 --> 00:06:23,000 On. 80 00:06:23,000 --> 00:06:24,000 Off. 81 00:06:24,000 --> 00:06:34,000 In that case, the frequency changed as you see in the output side. 82 00:06:34,000 --> 00:06:45,000 So this is how you can generate digital signal using that card and a USB 6001 with the help of Matlab. 83 00:06:46,000 --> 00:06:46,000 Thank you.