Tom Baker is turning his long-lost Doctor Who movie script into a novel | 220v Contactor Relay

I suppose I would’ve used small contactors with auxiliary contacts as interlocking instead through some sort of arrangement, but that’s only because I have a pile of them lying around (and you would just put the wires under terminals rather than QD’s) but as I said (and you reinforced) I trusted your QD’s, particularly at these…”small” levels of current.

You can not do it much more complicated! If you want to heat your print bed by induction, it has to be ferromagnetic to work with a commercial induction cookers coil. And using the copper coil as resistive heater is also no good idea.

You can use mains voltage if it involves already approved/CE-licensed parts that are simply wired together such as a power supply to a circuit board, but if you design and build your own part with 120 V inside, it’s on your head when the house burns down.

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.

I had a chance to spend a few days with a late prototype of the Sony A55 (equipped with production firmware version 1.0) prior to its release. (Note that the Sony A33 is so similar to the A55, that we’ve only made a few edits to this Field Test to make it work for the A33 review.) After running a couple thousand shots through it (it does have a very fast continuous mode) I found it to be a pretty compelling camera, combining remarkable shooting speed with a host of other capabilities that really set it apart from most of the market. It’s by no means perfect, but unquestionably expands the range of shooting capabilities open to consumers with average pocketbooks. Looking at just how much I found to comment on below underscores for me just how much Sony has done in the last few months. Read on for some of my thoughts on this new class of consumer SLR:

Quite often, when I was in the Air Force as a Cable Dawg, I would get zapped while doing copper cable cut splices for mission critical systems. Meaning they were left powered and came back on one by one as they were spliced. -48v DC is very tingly when it runs through a crimper and into your arm…

But if the power supply isn’t made for the 110-120 volt market, then yes, this can be a legit concern.

In my experience there are only TRIACs that are in perfect working order or TRIACs that have exploded.

A coworker at JPL got bit by an ion pump supply. On-site health unit recognized abnormal EKG, sent him to ER. ER doctor diagnosed a congenital abnormality unrelated to the incident. But he ended up with a date with a nurse, so he considered it a worthwhile exercise.

AC is safer than DC. You can let go of two AC terminals but not DC as DC keeps your muscles clenched. AC doesn’t.

You are correct and if you design this type of solution you already know this. With PCB design, the alternatives are heavier copper, wider traces, plating up copper in the areas that carry heavy current or a combo of any of the three. But you can only go so far with these solutions. Hack apart a known good SSR and I bet they use the exact same solution.

Senate Majority Leader Mitch McConnell has been clear that, aside from any spending bills, Republicans’ priority for the end of the year is to keep pushing judges through — and if Flake holds on this issue, it could throw a wrench into that plan.