It may sound horrific to some, but the UK commonly uses electric showers to heat the water instantly at the point of use. We do have hot water tanks or central heating systems, but it's just much more efficient to touch a button and shower under hot water in seconds. There's a very low accident rate, with the few incidents involving very bad installations. The one in this video is pretty old. Between 25 to 30 years old, with very retro electronics. I'm not a fan of electronics in showers at all. They just introduce reliability issues. In this case though, the electronics were working fine right up to the end. Time to get Ralfy my brother a new shower. (Without electronic controls.) 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 advertising algorithms allowing it to be a bit more dangerous and naughty. ... https://www.youtube.com/watch?v=AlU69Y6NcxQ

With the increasing use of vapour producing devices as an alternative to traditional smoke sticks, a growing number of "disposable" devices are becoming available. These are aimed at traditional users who are looking for the more "satisfying" vapour who are more used to buying pre-packaged products and are not into refilling or recharging devices themselves. These units tend to use rechargeable lithium cells despite being disposable because the cells are mass produced and available in a wide range of sizes. It seems odd to use a lithium battery just once when it could be recharged hundreds of times, but it's becoming increasingly common to do so when it would have taken so little to make the products rechargeable. It's all part of our throw away society. On a plus note, this means that when you see one of these devices discarded in the street it's viable to pick it up and salvage the cell out of it. In these devices the capacity of the cells measured:- Brown unit = 314mAh Green unit = 280mAh They have both taken multiple charges so far. Note that these cells are suited to short bursts of high current, but are NOT suitable for continuous high current applications like drones. My tests for discharging them used a simple circuit of a string of LEDs and a 47 ohm series resistor. The little cells run the LED strings for several hours. The cells have no built in charge protection, so they have to be used with a suitable charger PCB like a TP4056 based module (99 cents/pence shipped on eBay). The current control resistor is best changed from the usual 1K as supplied to a 3.9K resistor to limit the charge current to 300mA. Keep in mind that it's possible that some devices may use non rechargeable cells or LiFePO4 type lower voltage cells. But I would expect most to use standard lithium cells due to their wider availability and higher voltage. Especially when the control circuitry they are being used with is optimised for traditional rechargeable lithium cells. The liquid and vapourisation cartridge in this unit was very interesting. It uses the standard coil and wick as a vaporizer, but has a clever design of liquid feed that relies on capillary action to ration liquid flow without excessive leakage. I did refill the purple unit. By applying a heat gun to the glued end I was able to remove it non destructively and slide out the cell and vial. By drilling a 1.5mm hole in the plastic vial just next to the silicone end cap I was able to use a syringe to suck out the existing liquid and replace it with new liquid. I then wiped the area around the hole dry and capped it with a bit of insulation tape. The amount of liquid it holds is 1ml. (The rechargeable unit I showed holds 1.5ml in its cartridges.) When reassembling the sensor in it's silicon ... https://www.youtube.com/watch?v=ZsWLvr-dsvc

You can get clone keyfob remotes for older vehicles quite easily on eBay. Here's a look inside one with a staggeringly low component count. The single chip approach appears to be a versatile microcontroller designed almost exclusively for keyfobs and other low level transmitting applications. If you enjoy this channel you can help support it with a dollar for coffee, cookies and vehicular accessories at https://www.patreon.com/bigclive ... https://www.youtube.com/watch?v=0AqmPpzQ7mY

These effects aren't new, but I thought it was time to take a look at a current model and see what it's like inside. I'd also noticed that versions are being done for outdoor garden use, and I must admit that when fired up into a tree it's an impressive effect. Like a 3D sea of fairy lights in the tree. Of course, whether you should be firing lasers at planes and wildlife is debatable, but the divergence and splitting of the laser beam is probably enough to limit the risk of any issues. The ebay listing I bought this from was a UK warehouse. http://www.ebay.co.uk/itm/331698940343 ... https://www.youtube.com/watch?v=Bsb5X7fbUSw