Lenovo’s latest Yoga laptop has an ARM processor and 25 hours of battery life | 220v Contactor Relay

i built the rig that day. I put an ammeter with max hold on a circuit, plugged the circuit into a known 20 amp connection, and put a load on the circuit that simulated the instrument. Turn it on, 22 amps max hold, 13 amps nominal.

With this kind of economy available, I don’t care a bit about all-electric cars. I’m having my cake and eating it, too. Any EV with a sufficiently large battery to meet my traveling needs would be carrying too much unnecessary battery weight (and expense and charging time) to suit my local shopping and errand needs. So the future is already here, and it’s bright. I haven’t felt the need to upgrade my home charging, either. The car recharges in five hours, and I try to get at least that much sleep every night.

Or the other takeaway is that only some piece of esoteric surplus made several decades ago is the right thing for the job and then one can go have a philosophical crisis about whether at this point we’re just plundering the ruins of a failed civilisation or not.

No, it’s far more likely a combination of the strength of your flexor muscles (biceps) being stronger than your extensors (triceps), a bit of spinal reflex (sudden stretch of pain signal = withdraw limb) and observer bias; you’ve probably seen people electrocuted with 120v AC more often than 120v DC.

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Cooking Triac? In my experience there are only good Triacs and bad Traics. You can tell the bad Triacs because they usually have a a little bit of plastic encasing still attached to the three legs after they have exploded.

Virtually every home in North America is wired with 240V (NOT 220V!) split phase, providing 120V to ordinary receptacles, and 240V (NOT 220V) to larger appliances. Most kitchens are wired with 240V split phase to the (split) receptacles at the countertop, providing a very convenient 240V source if you just wire up the appropriate adapter to take the hots from each phase.

Having a ground helps in the case of appliances with metal cases. If the hot wire comes loose and touches in inside of the metal case, it is shorted to ground which will trip a breaker. Otherwise the metal case would become hot which is obviously dangerous. Soil resistivity has nothing to do with it and in fact it would be safer if it wasn’t tied to physical ground, that is just done to save money.

Experts suggest buying an EVSE that can produce at least 30 amps of power. Generally speaking this type of unit would be able to add around 30 miles of operating range to a given battery pack per hour. Some EVs can get along with fewer amps, but buying more capability than you may need today makes the installation “future proof” should you eventually trade in the vehicle for a model that can handle the added capacity. However, if you’re planning on using a 30-amp unit you may need to upgrade the line’s circuit breaker to one that’s rated for at least 40 amps.

However, there’s a reason we use 12V and 24V heated beds – they give us, at the very least, the illusion of safety. Therefore, [Makertum] is looking for a few comments from specialists and people who know what they’re doing.

Most people posting seem to have three stories, I only have two. Hard to believe I learn faster than you all; I must have just forgotten the other times.

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