50pcs/lot EE10-A1 Switching Power Supply High Frequency Transformer 220V to 5-12V Maximum Output 3W
It's the same supplier that I used also and the lot seems to be fine...well at least the 2 pieces that I tested so far .
Now the latching relays. I found them on Aliexpress only and I received something else instead (which seems to happen from time to time) but luckily it works OK so far. So instead of Hongfa relays I got Massuse which seem to be equivalent.
Rest of the components can be sourced from LCSC which is a more trusty component supplier compared to various vendors from Aliexpress (which I already knew..but I didn't had other choices).
Oh and the PCB design and everything else was done using EasyEDA for obvious reasons (JLCPCB is very cheap and pretty good quality for a hobbyist, also their SMT service). I really like their ecosystem - you just create the design using their tool and order everything from there - very, very handy and cheap also as I already mentioned.
@Mishka said in The Harvester: ultimate power supply for the Raybeacon DK:
The current design reached some level of stability so I think the AEM10941 is what I should try next.
Yes, at a 3 microwatt minimum, that chip may be very tough to beat. It has the same 380mv cold start voltage as the ADP5091, but it requires only half the energy. With these tiny solar panels that extra margin might really make a difference under dim indoor lighting conditions.
I guess it's no accident that the AEM10941 is the newest chip. Perhaps it's the constant improvements in cmos technology that it leverages. In which case.... we can probably look forward to even better chips in the future! For sure solar cells and panels continue to improve their efficiency. The markets are finally big enough to support the required R&D for continual improvement. And the mcu's and radios are constantly improving their efficiency so less power is required. It's great to be in the nexus riding a few waves like this, where we can get the benefit of multiplying the improvements together.