Lenovo’s retro ThinkPad 25 laptop leaks | Circuit Breaker Parts

The Battery operated Snow Blowers you see advertised are just toys… Just figure out how big the battery is and the trivial amount of work it could do.

Thanks for the pointer, it looks promising! The RF-controlled remote switch appliances that can be found for a few dollars are self-contained, I would think that a Wifi-based one could also be? Having a separate wire coming out of the box seems like an extra hazard to me. If you keep the thing self-contained with only mains-in/mains-out, I would think it is safer in the end, and removes the internal complexity of optocouplers.

Mains powered heated glass plates are common place in catering, same deal as a car back window, the heating wires are on the other side from the “working surface” these things can tolerate touching and even fluid spills, why reinvent the wheel, the solution is already commercially avaliable.

This Niro looks like a decent design with acceptable styling. I chose the Ford for its proven design and a good track record for reliability– plus about 40 extra HP, which is a well-kept secret.

So far we have discussed your bench and associated equipment. We are not however quite done though, because there is one final component in keeping your bench safe: you. If you have a piece of equipment in front of you and you are about to open it up, the most significant part of your safety routine doesn’t lie with your equipment, but in how you approach it.

I disagree, I think L1 EVSE represent a real safety concern. People use corroded outdoor outlets, poorly wired outlets, extension cords (without proper checking for damage or heat build up), etc.

That. Console. Is. Disgusting. Reminds me of my PT Cruiser’s cheapest part: the single piece off-white console.

Arc-Fault Circuit Interrupter (AFCI) circuit breakers run warm. This is normal, there’s nothing to report here.

A relay with its contacts can take some inrush current. I found value’s between 15A and 30A for a typical 10A relay. Some datasheets even specify motor load with FLA and LRA (locked rotor amp, the max. value you get at start up.

MOVs are rated for specific ac-line operating voltages. Exceeding these limits by applying a sustained abnormal overvoltage condition could result in overheating and damage to the MOV.

[Nick Sayer] falls into the “would rather build it than buy it” category. This particular project is a clone of a fast electric vehicle charger. There are commercially available versions sold under the Quick 220 brand name. The idea is that for fast charging, some electric vehicles call for a 240V outlet and Americans without electric cars often don’t have one. If they do it’s for an appliance like a stove or clothes dryer and probably not found in the garage.

Actually, some places (notably Australia and the UK) go to 240V, and this is +/- 10%, so theoretically you could be seeing anything up to 264V supplied. However, the supply companies seem to have a “better high than low” philosophy, and my UPS tells me I am currently receiving 257V on a 240V line. I actually believe the UPS, as I’ve regularly seen this happen with test equipment on the line.