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

Very nice. It’s similar to my Toast-R-Reflow power board (though that one has two channels and uses BTA-20s).

I have to say in this case it’s probably a necessity to get anyone to look at the photos, so humdrum is the subject matter

You likely encountered a shared neutral between more than one circuit. You have to switch off the breakers for all the circuits that share the neutral.

I’ve paid 18’000.- CHF in Switzerland back in 2017 for a 9.3kW roof top installation and I’ve gotten 5’580.- CHF back from the Swiss government in cash. That’s like 13 cents per watt installed

The Death Star post illustrates why we shouldn’t let economists decide how to run things. That and a million other stories from real life.

A good quality EVSE can cost between $300 and around $1,200. If you’re choosing a wall-mounted unit, expect to pay another several hundred dollars for installation, depending on local labor rates and permit costs.

HOWEVER: these are NOT 180 degrees out of phase. It is more like 120 degrees. I am taking it that America also has 3 phase supplies, rather than 2.

Second was with an old (illegal) CB amp that I was converting to HF, and I touched an unshielded feed inductor of some sort, the aftermath from the RF burn was worse than that time I grabbed the wrong end of an iron with my fingers.

A hobbyist should not screw with a Triac on house wiring if it will be “permanently” installed in a junction box. Make an adapter that plugs into a socket on the outside so that it is clear it is not a normal outlet. If you have to homebrew something like this use a good relay or contactor with a UR approval. AND read the spec on it thoroughly.

There are people that play with high voltage stuff like Tesla coils, induction heaters etc. Now those know enough to respect high voltage.

Agreed, the component is under rated from the start. If you look at a datasheet from a 25A SSR from a better company you will find something like de-rating curves which really show that as you move from the ideal conditions (20C temp, infinite heatsink) you should only use a smaller load. It is pretty easy to reach a limit of half the max load in normal conditions.

TJ may also want to mention on his project page that without a choke, the TRIAC will dump out a ton of EMI (that’s why most commercial dimmers have to have a choke in series with the load to be able to get FCC certification).