Best posts made by jeremushka

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.