On 28/01/13 14:51, Phil Ashby wrote:
On 28/01/13 12:00, Mark Rogers mark@quarella.co.uk wrote:
On 27 January 2013 01:04, Anthony Anson tony.anson@girolle.co.uk wrote:
Have a look at www.maplin.co.uk/ and see if (offers) N66JU; A92JH; A83LA float your boat.
Just to make it clear (because I don't think I did from the outset), it's not that I'm having a problem sourcing supplies that will keep the RPi going - I have some that do and some that don't, it's that the current method of testing (plug it in and see whether it crashes) is a bit inexact, and the correct method (read the label to see what current it's rated at) isn't working because the labels can't be trusted on some of them.
Also, there's the option of complaining and getting a refund on ones that are no good, and having a measurement to back me up always helps. And finally, perhaps more importantly for me, its the opportunity to learn how to get the measurement.
Sounds like a job for a dummy load and a voltmeter? Unless the crash isn't down to sustained low voltage but surge capability, dunno if the Pi has a current surge rating. There is a nice write up here:
http://elinux.org/RPi_Hardware#How_Can_I_tell_if_the_power_supply_is_inadequ...
Or a Wheatstone's bridge.