Yes you are correct, I was remembering from just people recommending power USB power supplies, but looking at the latest data, it seems that current is always less than 215mA. That chip looks good.
Before we get too deep into this topic of wire sizing, let’s acknowledge that while detailed conductor sizing is the job of engineers and electricians (not HVACR technicians), there are many cases where contractors are tasked with assessing whether a breaker or conductor (wire) is adequate in both retrofit and service situations.
I came here to post those two points! The corollaries to 1) are that should something go wrong, you have a chance if there is someone else there who knows CPR. I like mandatory CPR training for lab workers because of this. AEDs are good too. Rules against playing with things that can shock you while working alone are also good, but much harder to follow–I’ve spent decades working alone in research labs. CPR fails way more often than not, but electrical shocks are an important exception to that rule. And you almost got the extra credit for correctly spelling arrhythmia.
Also power the unit directly from the mains ( http://ww1.microchip.com/downloads/en/appnotes/00954a.pdf ) with the ability to power the unit directly with DC when (re)programming the ESP8266
Read ‘Hack’ as in ” don’t really know what they’re doing” or ” shouldn’t really work but does anyway”
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The only powertrain available to test was the new, higher-powered 2.0-litre hybrid, designed to offer eco-conscious buyers who like a bit more performance an alternative to the resolutely fuel- and CO2-focused 1.8-litre. Mated to a six-speed auto, there are two standout features: chiefly, that the link between the accelerator position, revs and actual performance are better matched than ever before, with the CVT-esque disconnect between them now greatly – if not entirely – reduced, and secondly that, so long as you are happy to let the gearbox run as an auto, rather than play with the mostly superfluous wheel-mounted paddleshifters and try to act out your inner F1 driver fantasy, there is strong, smooth performance on offer.
Having sorted out your bench, how about your tools? The chances are you’ll already have everything you need in this department, but it’s worth saying here. If you are using a tool or an instrument on a piece of equipment carrying electricity, it has to have the appropriate insulation properties for the voltage in hand. Perhaps you have to have experienced insulation breakdown in a cheap test probe at first hand to truly understand this point.
People that build or use 3D printers aren’t necessarily qualified electricians or know how to handle high voltage safely. That’s what I mean for ” Can’t let Darwin wipe them out when they happens to the target market… ”
You don’t need a 3D printer to use a heated print bed for 3D printing? I’d think that having the rest of the 3D printer would more or less be required to use a heated bed to facilitate printing.
But despite them being ‘commercial’, they’re still pretty hideous bits of cheap Chinese kit that I wouldn’t trust as far as I could throw them.
But Mike I would gladly clean under your stove for around 3kW of free power… Ahh ok so his parent’s don’t have a 220/240 outlet, makes much more sense now. In that case its a purpose driven hack, elegant in its simplicity.
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