1 00:00:00,000 --> 00:00:07,600 There is something I would like to show you today which looks like magic, but actually 2 00:00:07,600 --> 00:00:09,380 it's just advanced science. 3 00:00:09,380 --> 00:00:16,740 You can turn an LED light or any device on or off using an invisible energy coming out 4 00:00:16,740 --> 00:00:25,200 of your hands. 5 00:00:25,200 --> 00:00:27,280 Very interesting, isn't it? 6 00:00:27,280 --> 00:00:32,880 Alternatively, if you start with an LED light on, then you can turn it off and on again 7 00:00:32,880 --> 00:00:36,880 with invisible energies from your hands. 8 00:00:36,880 --> 00:00:37,880 Off. 9 00:00:37,880 --> 00:00:42,380 On. 10 00:00:42,380 --> 00:00:47,380 It looks like magic, but actually it's just advanced science. 11 00:00:47,380 --> 00:00:50,860 Let's study and learn today in this video how it all works. 12 00:00:57,280 --> 00:01:12,880 I'm still studying human Wi-Fi energies and here's something very, very cool. 13 00:01:12,880 --> 00:01:19,880 If we increase the size of the electrolytic capacitor on the circuit to 4700 microfarad, so it's 14 00:01:19,880 --> 00:01:23,480 visible and we choose the right voltage around 5.6 volts. 15 00:01:23,480 --> 00:01:25,480 It has to be very precise voltage. 16 00:01:25,480 --> 00:01:27,480 Then I make a human Wi-Fi switch. 17 00:01:27,480 --> 00:01:35,080 First, when I put my hand through the yellow antenna, it turns the LED light on and the LED light 18 00:01:35,080 --> 00:01:41,080 will stay on stably until I put my hand somewhere near this aluminum antenna. 19 00:01:41,080 --> 00:01:47,680 About that far away and the light will go off. 20 00:01:47,680 --> 00:01:51,180 Let's look at the human Wi-Fi switch from yet one more perspective. 21 00:01:51,180 --> 00:01:57,680 I put my hand through the loop, trigger an imbalance of the op-amp and the LED comes on. 22 00:01:57,680 --> 00:02:05,560 Then I put my hand wirelessly just somewhere near this antenna, that far away, it drains 23 00:02:05,560 --> 00:02:08,760 out the excess and the LED light goes off. 24 00:02:11,080 --> 00:02:21,880 If we go to a 47 microfarad capacitor, then we have a different and slightly more reproducible 25 00:02:21,880 --> 00:02:23,700 way of running the switch. 26 00:02:23,700 --> 00:02:31,800 We just set the voltage coming into the circuit so that the LED is strobing on and off. 27 00:02:31,800 --> 00:02:39,080 Now when I put my hand somewhere close to it, you can see that the strobe changes into a 28 00:02:39,080 --> 00:02:46,200 constant on light and I pull it out and it starts strobing again. 29 00:02:46,200 --> 00:02:53,360 Then if I come somewhere near and wirelessly come near this antenna, the light turns off 30 00:02:53,360 --> 00:02:54,640 completely. 31 00:02:54,640 --> 00:03:04,560 When I touch it, the light goes back on again. 32 00:03:04,560 --> 00:03:10,820 Just to conclude, if we go down from 47 to a very small electrolytic capacitor in parallel 33 00:03:10,820 --> 00:03:19,780 with the power supply of 0.22 microfarads and give a voltage of 6 volts, then the LED light 34 00:03:19,780 --> 00:03:22,820 will turn on by itself. 35 00:03:22,820 --> 00:03:30,940 If we drop that voltage to 5.8, the LED light turns off. 36 00:03:30,940 --> 00:03:35,740 We can put our hands through it and turn the light on wirelessly by Wi-Fi energies coming 37 00:03:35,740 --> 00:03:42,340 out of our hands, which create an imbalance in this off-amp over here. 38 00:03:42,340 --> 00:03:57,340 If we drop it further to 5.6, then the lights again off, we put our hands through nothing happens, but we can touch the loop and turn it on again by creating an imbalance of voltage 39 00:03:57,340 --> 00:03:59,580 in the off-amp here. 40 00:03:59,580 --> 00:04:08,820 Then finally when we go down to 5.4, we try to activate the loop by touching and maybe it 41 00:04:08,820 --> 00:04:16,540 comes in a little bit but almost nothing happens. 42 00:04:16,540 --> 00:04:22,820 We've gone back now to our 4700 microfarad capacitor and we're at 5.8 volts. 43 00:04:22,820 --> 00:04:25,700 Let's have some fun with our permanent on-off switch. 44 00:04:25,700 --> 00:04:29,940 Put your hand through, it turns on the LED permanently. 45 00:04:29,940 --> 00:04:36,820 Come over here, get anywhere near this wireless antenna with your hand, right there, and it turns 46 00:04:36,820 --> 00:04:39,140 the LED off. 47 00:04:39,140 --> 00:04:42,460 Put your hand through, it turns it on. 48 00:04:42,460 --> 00:04:47,760 Come over here, anywhere near this antenna, there, the light turns off. 49 00:04:47,760 --> 00:04:50,640 That's very, very cool and I love how it works. 50 00:04:50,640 --> 00:04:52,380 Thank you very much for your time. 51 00:04:52,380 --> 00:04:54,440 We'll continue to do more exciting things soon. 52 00:05:06,820 --> 00:05:23,000 Still, with a 4700 microfarad capacitor in parallel to the DC power supply, when we drop the supply 53 00:05:23,000 --> 00:05:32,760 voltage from 5.8 down to about 5.6, 0.1 or 0.2 below where the LED turns on, now we get what 54 00:05:32,760 --> 00:05:34,620 I call the standard switch. 55 00:05:34,620 --> 00:05:41,560 You put your hand into the yellow loop antenna and the light turns on temporarily. 56 00:05:41,560 --> 00:05:49,080 You come over here to the standard antenna, put your hands on it, light turns on, take your 57 00:05:49,080 --> 00:05:51,000 hands off, the light turns off. 58 00:06:02,760 --> 00:06:13,340 Touch your hand through your hand. 59 00:06:13,340 --> 00:06:25,080 You play, whatever. 60 00:06:25,080 --> 00:06:27,080 You