Although straightforward, you do this conversion at your own risk. The charger has exposed live circuitry inside when open and its main capacitors may hold a modest charge for a while when the unit has been unplugged. You make this modification entirely at your own risk. I am not liable for any errors on your side or my side. The components you will require are:- A suitable replacement transient suppressor (MOV - Metal Oxide Varistor) like this one:- https://www.rapidonline.com/joyin-jvr14n431k87yu4-275v-75j-mo-varistor-14n431k-26-3255 And optionally, but recommended, a 220K 1/2W resistor for across each of the two main electrolytic capacitors for balancing. Like this pack of 100:- https://www.rapidonline.com/truohm-cr-50-220k-0-5w-carbon-film-resistor-pack-of-100-62-0612 And optionally a new mains voltage two core flex, with a core CSA of at least 0.75mm. The two most important things in the modification are that the link MUST be cut and the transient suppressor MUST be replaced. Powering the unit up with either of those steps omitted will result in possible damage to the unit. As always, just take your time with modifications like these, and make sure you are comfortable with what is required before proceeding. Bonus technical notes... The charger will initially charge the battery at high current and then switch to a lower current to top the cells up to their fully charged state. It then completely disconnects the battery (relay clicks out) and goes into a standby mode dimming the green LED up and down. I measured the voltage across the two series electrolytic capacitors (fitted with my extra resistors) and the voltage was shared almost equally with just a two volt difference. The six screws on the PCB do not hold it in. They are for the two heatsink plates and plastic contact support. The screws that hold the case together are T20 (E4) security bits. Once converted to 230V operation the unit should not be used on 120V unless the link is replaced, as it would result in unstable operation of the switchmode supply. The existing fuse is an acceptable value, even if it isn't the recommended ceramic high breaking capacity type. 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 ... https://www.youtube.com/watch?v=ZNenxTVzFH0

The Glasgow meet clashed with a big football match, but still got a good turn out. Lots of technical talk and exploration of various gadgets. It's been hard to plan in advance recently, so the Glasgow meet will be literally a few days after I post this video. It will be at 3pm on Sunday 1st September 2019 at The Counting House, a pub on a corner of George Square in Glasgow. We usually meet in the room on the corner diagonally opposite from Greggs the bakers, assuming it's not already busy. You can keep up to date with meets like this on the official bigclivedotcom Facebook page at:- https://www.facebook.com/bigclivedotcom/ ... https://www.youtube.com/watch?v=wQ5nsQ5o-KA

Christmas time is here and that means it's time for Mr-T Santa to get merry with his big string of beads. Super-clever reversing mechanism involving two rotating plates with a slight differential so they rotate slightly out of phase to allow a ramp to pop in and out to change reversing gears. Given that both plates have a common driving shaft I'd guess one has a single gear tooth difference around its circumference to cause the slow rotational offset. Also a loud and weird musical element that is based on Jingle Bells - a track that is in the public domain due to originating in 1857. I'm sure some predatory "music rights society" will try and claim it though. The odd crashing sound effects over the top of the music almost suggest it has been borrowed from a cartoon version. The detail on Mr T santa is surprising. A very well modeled face with matching afro-curl beard, and glitzy attire reminiscent of asian culture. I was expecting a white Santa-beard regardless of skin tone. Mid-play video-adverts are annoying in technical videos, so I don't enable them. If you appreciate that and enjoy my content then you can help support the channel with a contribution of a dollar or two a month on Patreon. That also lets you critique the (advert free) videos before they are released, gives a more direct means of communication with me and also gives access to the regular relaxed Patreon live streams. https://www.patreon.com/bigclive #ElectronicsCreators ... https://www.youtube.com/watch?v=xZxKGg9hF7U

The original listing for this watch stated "Slimwe Ultrasonic Body Shape Wristband, Lymph Drainage Magnetic Bracelet" Which may be copied from the listing for an equally suspicious product. They've since tamed the listing to "Slimwe Ultrasonic Body Bracelet Shape Wristband, LED casual sports touch Bracelet" The listing originally showed various medical-style pictures implying that the unit liquifies fat cells, prevents lymph node blockage and promotes blood circulation. In hindsight, I noticed that the missing LED may have been as supplied, so maybe this is just their way of getting rid of factory rejects. Nice PCB though. Mid-play video-adverts are annoying in technical videos, so I don't enable them. If you appreciate that and enjoy my content then you can help support the channel with a contribution of a dollar or two a month on Patreon. That also lets you critique the (advert free) videos before they are released, gives a more direct means of communication with me and also gives access to the regular relaxed Patreon live streams. https://www.patreon.com/bigclive #ElectronicsCreators ... https://www.youtube.com/watch?v=OOEGjzPWgbM