[Arm-netbook] EOMA68-A20, MD 1.7 severe Power Problems

[Paul Boddie]

On Sunday, 26 July 2020 11:54:27 CEST Luke Kenneth Casson Leighton wrote:
>
> you *need* a stable supply to do that (1.5 preferably 2.0 A) designed
> *specifically* for providing USB power. UNDER NO CIRCUMSTANCES plug the 12v
> PSU into the USB socket.  and DO NOT use an "off-the-shelf generic 5.0v wall
> wart".  use something SPECIFICALLY designed for providing USB power because
> it is (a) stable and (b) current-limited.

All this talk of regulated power supplies reminded me of this product which 
takes a range of inputs via the barrel jack socket:

https://proto-pic.co.uk/product/sparkfun-prt-13032-breadboard-power-supply-stick-5v-3-3v/

Meanwhile, the CI20 can be powered from a USB port and employs a barrel jack 
socket to accept that power. According to the hardware reference it is 
actually "a 5V 4mm (shield) x 1.7mm (pin) center positive connector ... 
identical to that of the original Sony PSP":

https://www.elinux.org/CI20_Hardware#Power

I'm not sure if either of these things are relevant here, though.

Paul