Dave wants to know more about the flashing lights box behind Leo. Leo says that computers in the 70s had switches, and the blinking lights would tell you when the software switches were enabled correctly. The irony is that the box behind Leo is run on a Raspberry Pi, which is hundreds of times more powerful than the box it's emulating. We've come a long way since then.
Brenda wants to know if the Raspberry Pi is a computer that her grandkids could learn with. Leo says absolutely. It can not only teach kids how computers work but teach them how to program. You can run Windows on it; you can run Minecraft on it. It's an excellent computer for kids, and it's only about $35. But that's only the board. It's not the computer monitor, keyboard, or mouse. Check out ADAFRUIT; they have a great starter pack for around $100. Can you block websites? Leo says not on the Raspberry Pi, but you can do it from the router.
Scott has solar power and occasionally, the system will pop a breaker and go off. But he won't get notified that it's happened, even though he has an IP based system. How can he set up a text message that can notify him when it happens? Leo says if it was public, you could use a service like If This, Then That, to send you a text. But since it's private, then you may have to create your system using an old computer or raspberry pi to run a process that would ping your system to see if it's up and running.
Johnny bought a Raspberry Pi 3+b and he thinks it's a great computer project to do for creating your own Chromebook. Leo says Raspberry Pi is great for those who like to tinker, and for $35, you get a complete computer. That's remarkable.
Jonathan wants to record the conversations he has with friends. Leo says that mobile phones are great for that. He can not only record with decent quality, but he can also trigger it with a smartwatch. Apps include Just Push Record, but every phone has an audio recorder built-in. But remember, recorders need permission from anyone else they are recording.
Edward's brother in law lost his arm and he wants to work with his son to design a prosthetic arm that looks like the Winter Soldier. Leo says to check out OpenBionics.com. He can also search for 3D-printed arms. It's becoming a huge space in the Maker community, as people are designing and 3D printing the prosthetic arms. Also, look at Raspberry Pi projects that use voice control. Check out ChatterBox, a DIY smart speaker that is a homebrew digital assistant.
Jay would like to plug in a Raspberry Pit and Mac Mini into the same monitor. Is there a switch for that? Leo says that while the Pi has an HDMI, the MacMini also offers Thunderbolt 3. So you want to get an HDMI capable monitor. Jay also says that Pi 4 is going to be TB3 compatible. Leo says if that's the case, then a splitter could be easy. Or one that has multiple inputs. KVM switches are more flexible. IOGear makes some of the best ones. Monoprice have some that are good. Most use software to control them. Leo has one called IHSE DRACO for the studio.
James is a HAM and he wants to build a Raspberry Pi for using D-Star to run his HAM online. Leo says James will need a few extra pieces to work, but it's the ideal device for that purpose. Check out RaspberryPi.org for more information on how to use a Raspberry Pi for a host of uses. You can even use it as a computer running Linux and Windows 10.
Gary wants to know if he can use a Raspberry Pi to host his own web site. Leo says that's a great idea. If he installs an FTP program, how can he get that to talk to his Apache server? Leo says this isn't ideal for a public site because of upload speeds and terms of service with the ISP. But if it's a personal file server that he can access for the web, that's legitimate. He also has to punch holes in his router firewall to get it, and that means to be sure his Pi is secure and up-to-date. Leo also recommends using Secure FTP to keep his system secure, and set port forwarding to Port 80.
Brian builds Raspberry Pi computers for everything from running DVRs (via Kodi) to routers. Leo says that Raspberry Pis are great and for $35, they're incredibly powerful. But his HDMI switch died recently, and it won't recognize his Pi anymore. Leo says that HDMI switchers are notoriously finicky. He'd be better off with an A/V receiver with multiple HDMI ports. It's the best way to go because the audio gets switched and stays in sync as well.