This is a rather unique USB rechargeable UVC germicidal light I got secondhand from eBay. I've not seen any other that uses a similar lamp with battery power. The circuitry started off quite pleasing until I spotted a rather dubious "option" link that bypasses a very important component deliberately. One notable feature of this light is the use of an LED driver to run a vintage technology mercury vapour discharge lamp. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators ... https://www.youtube.com/watch?v=myJqyR9YVhQ

I'm not sure about this thing at all. The idea is that you plug it into your cars OBD2 diagnostics connector and it analyses your driving and engine performance, and then remaps your engines control parameters to make it more efficient. The OBD port is fitted near the drivers position in all modern cars. It's an industry-standard communication port that allows mechanics and technically minded owners to access their vehicles diagnostic log and check the output of various sensors. Up to this point I was under the impression that it does not allow you to modify engine settings other than to reset warnings. The only possibility of this is where a manufacturer might use the OBD port to upload software into the cars computer, and it does appear that some models do allow that. However, from what I've found online, the OBD port is not really suited to re-mapping engine characteristics. Then comes the awkward situation of whether you should plug ANY device that claims to alter engine settings into your car. There are so many different makes and models of car that the software would have to identify the make and model, type of engine and the parameters it could safely change. You would then be relying on a bit of software of unknown origin that was basically messing around with settings in a vehicle that could damage it, cause it to malfunction suddenly while being driven, or even just brick the cars control computer completely. All these scenarios could result in thousands of pounds worth of damage. So it's a surprise that the unit does have more than just some blinking LEDs, but also has all three main communication networks brought up to the PCB that has a processor and crystal on it. It does allude to the possibility that it is communicating with the cars computer. Whether that's to actually do functional things or just put on a show by activating various lights on the dashboard for show is hard to determine. I'm not sure what to make of this. I certainly would NOT plug this into my own car in case it did cause irreversible misconfiguration of random settings. There's even a possibility that a very naughty bit of software could program in an extra key code to the security system as is possible on some BMW models. That could give thieves access to your vehicle with a "universal" key. During my research on the availability of OBD based tuning software the sites I found were very much the hard-sell quack sites that keep pounding their message for a long time before finally getting round to indicating the price (usually at an amazing discount) and then try to stop you navigating away from their site by using suspicious pop-ups to block your exit and imply that a sales advisor is wanting to talk to you. Just the wrong type of site completely. The ... https://www.youtube.com/watch?v=S8vjWXXIJas

This is a home automation product that lets you run a bath or have a shower by voice commands via your voice recognition device and a remote server. It looks like someone put a lot of work into the design, but it seems like a bad idea to have your shower controlled via a remote server (which may be down). The idea of a glitch or hacker turning your shower on unexpectedly while the door or curtain is open, and flooding your house, or even just splurging gallons of hot water down the drain seems undesirable. With no physical override it also means that a system crash, fault or hack could leave you with no way to have a shower, bath or even wash your hands. Then there's the cost of getting a "home automation expert" to repair it. It's an industry flooded with big egos with matching hourly rates. But Kudos to the people who actually designed and built this unit. It looks like it was a valiant effort to create a functional product, albeit a bit ill-conceived. It certainly looks like it was expensive to develop and manufacture. The Home Assistant posse do seem to be exploring the protocols of this system to try and get it back up and running on a local network. https://community.home-assistant.io/t/smartap-shower-control-getting-started-with-reverse-engineering-a-smart-home-device/358251 If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators ... https://www.youtube.com/watch?v=1zZzIOk19dI

This was just one of "those" projects that I did for fun. The first one that used a lot of very dim but expensive LEDs at that time. The design is based on a string of six 4015 dual 4-bit shift registers cascaded into one big 48 bit one. It drives clusters of LEDs with buffer transistors. If you enjoy my videos you can support the channel with a dollar for coffee, cookies and brighter LEDs at https://www.patreon.com/bigclive ... https://www.youtube.com/watch?v=Yexp-I8lzP4