Reddit reviews SMAKN DC 5V/3A(MAX) AC/DC TO DC Buck Power Converter Voltage Step Dowm Power Supply Waterproof Input AC 7-36V/DC 8-50V
We found 6 Reddit comments about SMAKN DC 5V/3A(MAX) AC/DC TO DC Buck Power Converter Voltage Step Dowm Power Supply Waterproof Input AC 7-36V/DC 8-50V. Here are the top ones, ranked by their Reddit score.
All epoxy sealed containers with Waterproof Housing; Non-isolatedHigh efficiency: >96%; Reliable, low heat dissipation max. 40 ℃;With overload / over-current / over / low voltage protection, stable performance.Light compact, convenient to use and transport; Auto recoveryWidely used in Car device, such as LED Display, Hard Disk Player, MP3, DVD, GPS, etc
https://www.amazon.com/SMAKN%C2%AE-Converter-Voltage-Supply-Waterproof/dp/B00RE6QN4U/
one of these bad boys will power it, unless you have one of the REALLY old 48v AC doorbells. (You probably don't, they were rare and ~1900-1930 era) if your smart-bell is 5v. the same company makes 12, 15, and 24v output as well in a similar price range.
everything else depends on your model of smartbell and your skills and software on the pi =)
Thanks for all the great info! I stumbled on Will's repo when I was reading through issues on github. So I had pulled and built that one already. Turns out that using solid core wire was the fix for my rs485 issues. I'm finally up and running!
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I used a 5V/3A converter (https://www.amazon.com/gp/product/B00RE6QN4U) to power the pi from the 24V AC at the thermostat (wires C and D). It powered the pi fine and ran without saying it was throttled. But would almost always timeout in the rs485 communications. I tried running my rs485 ground to a ground on the gpio, just in case. No luck there. I tried tying that ground with the ground on my power adapter too. Still no luck. I tested with the multimeter and it's giving a solid 5.01V DC from the 27.3V AC source, but I guess it must not be putting out enough amps... I plugged a normal power brick into the wall and tried again, and it all worked fine! Guess I'll need to find a better source for the 24V adapter.
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Anyway, that killed my night, but I'm going to try and grab your component tomorrow and start tinkering with it. Thanks for sharing. Looking forward to giving it a shot!
https://smile.amazon.com/gp/aw/d/B00RE6QN4U
indeed! https://smile.amazon.com/gp/product/B00RE6QN4U
enjoy!
It feels like you're throwing darts at this! A rectifier converts ac to dc, and apparently a buck converter changes one dc voltage to another. So it looks like the 2 things are backwards in your drawing.
But in any case, I'd just use a cell phone charger if there's an outlet nearby. Or at least get it working with a cell phone charger or a power bank that has a USB port.
Questions include:
etc.
And finally, is there a single device like the following that might simplify the design. I don't know anything about this product, except that it appears that it might have promise.
https://www.amazon.com/SMAKN®-Converter-Voltage-Supply-Waterproof/dp/B00RE6QN4U
After doing a little more digging, it seems I can just buy this that will do the job of both the buck converter and the bridge rectifier.
Would this work out of the box?