In message , Martin Gregorie
 writes
>Total the power requirements of the DH22, Edimax and RPi. Compare with
>stated output of the PSU. If close to, or exceeding the PSU capability,
>get a bigger PSU.
>
>Remember that an RPI can need 2100mA while booting though typically will
>only uses 500mA while running. This was correct for the RPi B+ - the Pi 2
>and 3 may/probably will have higher power requirements.
>
>Find out whether the other devices have similar spikes and size the PSU
>accordingly.
>
>Note that the flat, square, black two-outlet USB PSUs sold by Maplins had
>a TOTAL capacity of 1000mA: I'm certain that other PSUs have a similar
>limitation.
>
>Get the current requirement of each device by reading the spec or,
>preferably, using a multimeter on each device. Yes, you may need to make
>up one or more leads that you can connect the multimeter to. Make you use
>the maximum  current drain for each device and assume that they can all
>happen at the same time.
>
>

Thanks, the old power supply is marked as 2000mA, so I'd be looking for
one at least that size as a replacement.

Adrian
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