Your system works with phase and neutral wires? Will you make it compatible without neutral as well? In my house installation no neutral behind the wall switch only phase. And o the lamp side only neutral and the return wire from the wall switch.

@sundberg84 I am building an efficient AC/DC power supply to avoid using the HLK-PM01. I design the power supply with flyback topology with high safety as it is fully isolated.
in the current design i selected the component BF1550. It is a high performance AC/DC power supply control
device which is operating in primary side sensing and regulation. It includes an internal power BJT and is designed for off-line power supplies within 6W output power.
Based on that, i designed the transformer. I need to find a factory to produce it.
My goal is to introduce in any nodes this AC/DC power supply for safety reason and efficiency DC regulation.

@berkseo said in 💬 EFEKTA Temperature & Humidity mini sensor:

@jeremushka said in 💬 EFEKTA Temperature & Humidity mini sensor:

Is it possible for you to share the sketch as it has been removed from the project presentation because of the rules of the website?

https://www.openhardware.io/view/589#tabs-source

Thank you very much. Great casing, it is very discret. professional design. congratulations :)

@axillent i have bought one livolo light switch which has an transformer and the system is working without neutral wire.
Also here is a specific design from AC power integrations website:
https://ac-dc.power.com/design-support/reference-designs/design-examples/der-622-two-wire-no-neutral-wide-range/
However, it works with a non isolated flyback transformer. The specs are defined but it is necessary to produce this transformer to have a try.