My last project; I took an ATT phone charger apart and used the converter, Wemos D-1 Mini and a relay to make a switched "smart" outlet. I control it with Home-Assistant via Mosquitto MQTT protocol over WiFi.
Is there a smaller "JUST AS RELIABLE" way of converting the power to 5V? I would like to shrink the footprint of the project.
Thanks
Hard to say if something is "smaller" without any form of reference.
septillion:
https://www.aliexpress.com/item/5PCS-AC-DC-5V-700mA-3-5W-Precision-Buck-Converter-AC-220v-to-5v-DC-step/32741379032.html ?
This was perfect. Received it about a week ago. Validated the output this weekend. Puts out a solid 5V DC.
Definitely smaller. About 1inch by 1 1/2. I've already wired it into my next project and ready to order more.
Thanks
I would choose these encapsulated versions:
Good to know. I'm going to have to purchase 1 just to check it out. Reliable vendor as well. I've purchased 100+ items from them without problems.
Thanks!
Remember, AliExpress is not a single vendor.
Those HLK-PM01 are great as well. Little less powerful but very cool 
Hi,
I have used the encapsulated units in repair work, PLEASE put a fuse on the AC side, just for the supply module.
Tom...
I had also thought that for compact mains power projects, it would be good to have a compact ready made module which incorporates a power supply, relay and fuse with as much as possible of the mains side shielded or encapsulated, but with exposed screw connection terminals.
This is what i had to do (for a time switch project) because no such module exists (yet).
http://forum.arduino.cc/index.php?topic=441948.0
Hi,
I ideally a PCB with one of these supplies should have isolation slots cut into them.
About 3/4 of the way down the page.
Tom..