I have some Sonoff SNZB-06P Human Presence Sensors I wish to install, I wish to 'spur' out from a mains wall socket, and provide power from a power supply module fixed inside a surface box.
This requires an Input Voltage of 5V 1A.
I note the input voltage for this is rated at 1A, this seems quite high for such a small device, is that because the Voltage is very low (5V).
I am considering something like this:
240v > 5v
Input voltage: AC 85 ~ 265v 50 / 60HZ or DC100v-370v
Output voltage: DC5V (± 0.2V)
Output Current: 350 mA
Power: 3.5W
Or
5V 2A
It but doesn't quote a Wattage.
I calculate the power consumption as W=amp x volts, but cant work this simple equation out.
How can a 5V 1A Output supply, equate to 350W ?? (5W=1A x 5V) ...confused.
I presume these little Power Supply modules are what you will get in say a plug in mobile phone charger, like this: (bigclive.dom is not a fan:
)
I also want to power a TRVZB Radiator TRV with a Power Supply, rather than run it off the batteries:
It takes 3x 1.5V AA batteries, so Power Input is 4.5V, but it has a motor in it, so will assume the power required will be more than the Human Presence Sensor mentioned above (the SNZB-06P)
Any thoughts appreciated
This requires an Input Voltage of 5V 1A.
I note the input voltage for this is rated at 1A, this seems quite high for such a small device, is that because the Voltage is very low (5V).
I am considering something like this:
5V Step Down Power Supply, AC 220v - 240v to DC 5V Power Supply Step down module | eBay
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Input voltage: AC 85 ~ 265v 50 / 60HZ or DC100v-370v
Output voltage: DC5V (± 0.2V)
Output Current: 350 mA
Power: 3.5W
Or
5V 2A
It but doesn't quote a Wattage.
I calculate the power consumption as W=amp x volts, but cant work this simple equation out.
How can a 5V 1A Output supply, equate to 350W ?? (5W=1A x 5V) ...confused.
I presume these little Power Supply modules are what you will get in say a plug in mobile phone charger, like this: (bigclive.dom is not a fan:
I also want to power a TRVZB Radiator TRV with a Power Supply, rather than run it off the batteries:
Any thoughts appreciated
Last edited:
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