Hi,
I am on my way toward my PS-Pi which is like you'd expect a standard PS1 modified to be used with EmulationStation as a PS1.
On my first attempt, I cut the power board to have just the small portion on the top to keep the original plug, and the other side to keep the buttons and the led. Then in the middle, I tore down a USB charger and soldered through the mains and the button. It was working nicely, but pretty ugly on the inside.
For the second attempt, i'd like to keep the power board safe, and using it's 8v output and reduce it to 5v to have my Raspberry Pi and other components working.
My main idea was to use a regulator since it's not much difference in the voltage, it would not heat that much.
I have at home an L7805CV which is acting wierdly: I use it on the 8v supply and it was outputting 5v as expected, but then I plugged my mobile phone on it and.. surprise, it barely detected it, it started to charge, and after a second or two it stops...
So I tried to measure the ampere but with my poor 12€ multimeter I do not know how to read it correctly, my guess would be that it outputs ~1mA and it's fluctuating a lot between .6 and 1.2 mA (That's what is written on the screen when I am on "20m".
Then I read the datasheet and it was written that the minimum supply needs to be "10v" so I tried on my ATX psu on the 12v and it does the same thing..
I would like to use the one I have if possible, and if not I would like to know which do you recommand me...
I found this on ebay and it looks like enough (my guess would be that I need 1A, for the Raspberry, the mouse/keyboard eventually, the wireless key and the gamepad controller):
http://www.ebay.fr/itm/5-L7805ABV-ST-MICROELECTRONICS-/151758550869?hash=item235583b755:g:szkAAOSwHnFVtQ4tIt still looks like pricy for me, and I don't want to waste money for nothing...
There is also a 3.5v on the PS1, if I can bind them together or somewhat I could have a 10+v input for the regulator
Thanks in advance