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ESPurna is open source firmware for ESP8266-based wireless switches (such as Sonoff POW) that I personally use to monitor power consumption in my office. Developer Jose Perez (aka Tinkerman) has now developed his own hardware using the ESPurna-H board, since existing wireless switches with power monitoring capabilities don’t fit into the combo box.
Xose designed the board using Eagle 8.0 and published the schematics, PCB layout, specification sheet, and other hardware design files under a Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA 3.0). You can find these files on github.
The board is not for sale, but you can buy a PCB at OSH Park, purchase the components separately, and finally solder it yourself. Since this is a hobby project, no specific safety testing has been done and you better know what you’re doing since the board is designed to be connected to a power source. Even companies make mistakes sometimes. If there is a design flaw in the PCB, it can overheat and melt the surrounding plastic or even cause a fire in the worst case scenario.
Xose completed the setup by attaching a capacitive touch switch to the lid to turn the light on and off, and the end result above looks pretty neat.
Jean-Luc founded CNX Software part-time in 2010, quit his job as a software development manager and later began writing daily news and reviews full-time in 2011.
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Wow, 220-240V in Spain is carried out through very thin wires! Nice board, hope itead takes it over, but also works with TH16 and RTC connectors (although I seem to be the only one who wants to use RTC in these things…)
In most of Europe this would be highly illegal as you would need an electrician to install something like this and you would have to be electrically certified.
It has nothing to do with where it comes from: if something breaks, you’re the only one responsible, but if, say, a house burns down, it could be millions of dollars because there’s no insurance to cover it.
Someone needs to make this in the USA. UL testing isn’t cheap, but the design looks good and doesn’t cost much to sell. The only thing I’m not sure about, even with the UL certification, is whether craftsmen would want to put their names on it in case of fire and liability issues. This is a completely new angle of the law for which I have not seen any precedent. You know what they say about pioneers, they had arrows up their ass. I would really like to have such a device. The only… Read more »
Just when you thought you’d seen every RF atrocity possible, a PCB antenna appears right next to your switching power supply. But hey, he left a cutout in the slab, so it’s okay, yeah…
Post time: Mar-25-2024