WEBVTT 00:00.180 --> 00:06.540 Before we go and manipulate real hardware components, here is a quick word of caution, though. 00:06.570 --> 00:12.030 In any case, you don't really risk anything for yourself or other persons. 00:12.390 --> 00:16.190 The current and voltage inside the Arduino are really not that high. 00:16.410 --> 00:23.580 The biggest risk you have is to make a short circuit which may damage hardware components all the board 00:23.580 --> 00:24.210 itself. 00:24.450 --> 00:26.730 In most cases, you should be pretty safe. 00:26.940 --> 00:33.180 The Arduino is actually quite hard to burn, but it's still possible if you manipulate it in the wrong 00:33.180 --> 00:33.510 way. 00:34.050 --> 00:38.340 Don't worry, though, if you follow a few basic rules, you will have no problem. 00:38.760 --> 00:45.240 First, when you want to modify something in the circuit, even just one wire, then if you are not 00:45.240 --> 00:53.040 100 percent sure of what you do, the best way is to first power of the original, which means removing 00:53.040 --> 00:57.420 the USB cable from the other side of the computer side. 00:57.810 --> 01:05.370 Make your modifications double, check your security and power the other again, second, double or 01:05.370 --> 01:05.850 triple. 01:05.850 --> 01:09.990 Check all your circuits before you power on the aluminum. 01:10.560 --> 01:13.500 This will make you avoid very simple mistakes. 01:13.710 --> 01:19.500 Like, for example, connecting five votes are a digital pin directly to the ground. 01:20.340 --> 01:25.930 I personally double check all my circuits, even for the most simple ones. 01:26.440 --> 01:36.570 Third, no Wendy Adriano Espaillat on don't use any metric tool like a screwdriver are open to touch 01:36.570 --> 01:37.320 the circuit. 01:37.710 --> 01:43.950 With this, you already have a chance of creating a short circuit and thus burn a component all the 01:43.950 --> 01:44.780 out in a boulder. 01:45.480 --> 01:51.900 And finally, for when you build a circuit, you will connect multiple hardware components together 01:51.930 --> 01:54.160 and all with the pins. 01:54.750 --> 01:59.860 Make sure that all your components are connected to the same common ground. 02:00.270 --> 02:05.850 This is super important both for safety and to get great results. 02:06.330 --> 02:11.760 A good practice is to first connect the ground whenever you add a new component. 02:12.180 --> 02:15.830 And we will see more about that in the following license, of course. 02:16.370 --> 02:16.890 All right. 02:16.890 --> 02:20.040 Now, don't be too scared of manipulating your in a board. 02:20.220 --> 02:24.480 If you follow those basic recommendations, you should be totally safe. 02:25.070 --> 02:30.480 The end of the course with a little bit more experience, you will be confident enough to build your 02:30.480 --> 02:35.040 own circuits and applications in a safe way. 02:35.250 --> 02:37.380 And now let's build that first secret.