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Marshall Headphones’ Bluetooth speakers are getting an Alexa update | 19mm Momentary Push Button

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Um, Though I live in Oz where we have 240 volt mains, I can see a big error in how it is explained. On, you get two different “phases” on th 110v side of things to increase the measured voltage.

Exactly, sometimes less of a compact form factor makes a better product overall. Snubber circuit is a nice touch tough.

All electrical devices are designed with safety in mind and are rigorously tested to make sure the design works. All of us have probably plugged in one too many things on the same circuit and tripped a breaker or blown a fuse, and that’s the first consideration you need to know about the Amazon Smart Plug — it has a safe output rating based on the type of load you’re using. Here are the exact technical specifications according to Amazon.

And for example the max continuous current one is “rated” for is 20A, and when I calculated the values without any heat sink, I should be able to run about 700mA. A lot of people forget to do this step before de-rating.

High definition Contactor 12v -<br />
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Eh, boneheads frying themselves or setting their houses on fire because of DIY approach to mains wiring are hardly something new that can be blamed on the “maker movement”.

You need to factor in the kWh you used within the week (along with the cost per kWh). This will give people a better idea of actual cost to power this vehicle 253 miles.

Good call, light bulbs and heating elements don’t need perfect smooth precise 12vDC, as long as it’s in the ball park you’re good.

In the case of Chinese relays and SSRs I double the amps and add 10% …. Ditto for Chinese switching regulators which put out everything but DC after they reach about 50-60% of their rated load

High definition Contactor 12v -<br />
 Motor circuit breaker	GV2P04 - Simply Buy

I was looking for a high power capable latching type to stop my old car from draining its battery… Came across this.

Even if you have 20A circuit breakers, 15A is going to likely be the circuit limit because most heavy-duty extension cords you can get are only rated for 15A – which, again, means charging at 12A.

I have used a setup like this using two back-to-back “door-bell” transformers (220V to 9V) to play with neon tubes when I was a kid. The current was so low that even a lightbulb wouldn’t turn on. However, it was enough to teach me about electric shock from mains voltage when I have carelessly put my finger across the output terminals …

The device uses two hot and one ground to supply the 240V output which is, in some business where there is three phase power this will be closer to 208V but should still work. Obviously you shouldn’t be doing this unless you know exactly how it works, and we applaud [Nick] for airing these hazards while at the same time supplying the knowledge behind the concerns.


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