Google’s Night Sight for Pixel phones will amaze you | Lrd12 Overload Relay

I have one SSR marked Fotek with 40A on the label and a 16A device inside. I feel a bit sorry for the real Fotek if this is the case.

I don’t think you can get multimeters that share the volts and amps socket, since the amps is usually a shunt to the ground terminal, very low-resistance, big and chunky high-wattage resistor. Volts is, ideally, infinite resistance, but not in practice of course.

They call those death sticks in the electrical trade. Those are just the first step in making sure it’s safe.

I use mains power for my bed on both of my 3D printers. It’s controlled from RAMPs exactly the same as a 12v bed would be with the exception that the signal from the RAMPs board is used to trigger a solid state relay. I use a standard silicon heat mat: https://www.google.com/search?q=3m+heat+mat&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjawpmuoOPJAhVFtIMKHXC1AO0Q_AUICCgC&biw=960&bih=557

Semiconductors can fail, and when they do, they often fail in ways that make conduction paths that otherwise should not exist. Mix that with high voltage power and you’ve got a recipe for disaster.

Later while an engineering student I worked in a factory where they built video projection systems with a 30kV final anode voltage

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If it is a three phase installation then there are four wires run. These are three phases and the star centre point or neutral.

But at the very same time, if the rectifier dissipates enough energy for this to be a concern, then it is probably a poorly designed power supply to start with. As most power supplies will be designed for the voltage range of 110 to 250 volts AC. And as it will draw the most current down at 110 volts, then this is where the manufacturer has their specifications chiseled in stone, as if we want 1100 watts, then we need at least 10 amps when we have 110 volts AC on the input. This means that we “effectively” have 5 amps to dissipate per diode.

Coastal BC might be viable for them, here in the “temperate” bit of Ontario they’d be good in April and October.

The Sony Alpha A33 uses a 7.2V, 1020mAh InfoLITHIUM battery pack, with part number NP-FW50. Tested to the CIPA standard, the Sony Alpha A33 is rated at the lowest battery life among its SLT-series siblings, with 340 LCD shots, or 270 shots with the EVF. That’s perhaps a little surprising, given that it lacks the built-in GPS receiver of the A55V, has a lower-resolution image sensor yielding less data to process, a reduced shooting speed, and less buffer memory. By way of comparison, the A55V captures 380 shots with the LCD, or 330 shots with the EVF, while the A55 can manage 390 shots on the LCD, or 350 with the EVF.

Agreed. I don’t see us revisiting the war of the currents. Interties between independent grids make sense, but there’s a reason that AC won, and I don’t think time and advancing technology has significantly changed that.