I hope to find some help here with powering of sensor module. I have sensor, that was designed primary for battery usage, so it is extremelly low power, now I was aked to try this sensor also indoor with power from mains (110/220V), and here I have already spend hours on internet without any progress. I need power module that will provide the sensor with 5V, but as there will be many of them (start with 1, 2, 10, up to 1000) running 24x7 it is expected that one of biggest advantages (low power) will remain.
Input voltage: 5 V (+30% -5%)
Input current: 0.005 mA (typical)
Input current on action: 5mA (typical) 10mA (max)
Sensor run time: 24x7
Sensor action: 16 minutes/day (typical) 60 minutes/day (max)
What I have found are PCB (not necessary needed) power modules that have reasonable self power consumption <50mW however they are at least 1W and require minimal load of 5 to 10% (10 to 20 mA) which is still significantly more than sensor consumption. Then there are power source modules that have no minimal load limit, however thay have internal power consumption cca 1W which means (calculated to 1000 sensors) that power supplies will consume 24 000 W/24h and sensors will consume 0.6 W/24h which I consider as unfair :-(
Looking forward to any help.