How does compare using one power supply for multiple devices vs each device having its own - regarding efficiency eg. power consumption?
Model situation: Home automation using low power devices such as sensors with Arduino, Raspberry Pi, Esp8266. Given 5-12V is not smart over long distances in a house, assume 24V power supply.
- Put low voltage cabling and power devices either directly from 24V or use a voltage converter to step-down to 3, 5, 12V respectively.
- Each device will have its own small power supply from mains voltage, such as hi-link or similar.
Is there another aspects to consider aside from obvious like labour and cost of putting separate cabling?