USB PSU 5V - 1 Amp
USB charger/power-bloc for device requiring up to 1000mA!!!!
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USB power wall (5V 1A)
Not recommend for WIFI device
This power supply is not cost effective enough to support a WiFi module.
If you are using a USB WiFi module (as for the Pi) then you should use a USB Hub with its own power supply.
If you want to use an Arduino Yun then you will need:
- either disable WiFi (and use wired Ethernet),
- or opt for a power supply supporting 2 to 3 Amp..
Why?
Because a WiFi module can consume current peaks of up to 2 Ampere. If the power supplies are equipped with capacitors, this is nevertheless demanding and can cause voltage drops that can crash (reset) your Raspberry-Pi or Yun Card (for example).