portable psx original questions

blaze3927 · Post by **blaze3927** » Tue Dec 09, 2008 5:21 am

hi
basically the run down is i've started a playstaion (scph 9002) portable. i've bought everything (batteries, screen, controller) except the tact switches. A couple of questions I have include

since i'm using the original psx i require two batteries, a 3.5v and a 8 volt. I could use just one battery pack but i'm too lazy. how could i wire a switch so i turn on both batteries simultaneously with the one switch (not too sepearte ones.

the "batteries" i'm using comprise of 7, 1.2v AA 2800 mah (for the 8.4v) and 4 AAA 1.5v batteries (for the 3.5v power supply (using resistors)). they are both nimh. how would i go about charging the battery packs without pulling each AA or AAA battery out one by one. btw i have a usb nimh charger.

final question so far, how would i go about adding volume control to my amplifier. the amplifier i have i pulled out of a pair of nokia speakers. is the volume control just a simple switch with a resistor connecting the the power input or do i have to do something tricky.

cheers

bacteria · Post by **bacteria** » Tue Dec 09, 2008 10:55 am

Use one set of batteries and a step-down regulator (eg TI card) to get the 3.5v you mention.

Use a PSone board instead of PS1 board if you can, only needs one voltage and smaller too.

Kyo · Post by **Kyo** » Tue Dec 09, 2008 12:00 pm

technically, that is not correct, bacteria. The PSOne needs (just like the screen) 7.5 and 5V

Post by **bicostp** » Tue Dec 09, 2008 12:26 pm

But he's not talking about the PSone. The original poster wants info on one of the old model Playstation motherboards.

Kyo · Post by **Kyo** » Tue Dec 09, 2008 1:17 pm

yeah, but bacteria said the PSOne had only one voltage, and I was just pointing out that that's not right.

hailrazer · Post by **hailrazer** » Tue Dec 09, 2008 3:18 pm

Kyo wrote:yeah, but bacteria said the PSOne had only one voltage, and I was just pointing out that that's not right.

What exactly do you mean ? I am powering my Psone right now with one 7.4v Lithium Poly.

Kyo · Post by **Kyo** » Tue Dec 09, 2008 3:29 pm

my point is that it gets stepped down to 5V as well

hailrazer · Post by **hailrazer** » Tue Dec 09, 2008 3:32 pm

Kyo wrote:my point is that it gets stepped down to 5V as well

So ? It gets stepped down to 4.6v , 3.5v, 1.2v, 2,6v and several hundreds of other voltages all over the board.

The fact of the matter is that it's runs off a single 7.4v-7.5v source.

Yes there are other ways that will work but why complicate it.

Kyo · Post by **Kyo** » Tue Dec 09, 2008 3:37 pm

ah, fair enough

blaze3927 · Post by **blaze3927** » Tue Dec 09, 2008 4:25 pm

i'm using the psone original cause i have three of them and it would be more challenging. the only problems i've got is that i need an easier way to charge both battery packs, volume control, and a single power switch

edit, no longer need volume control as their was an amp on the screen

edit;
say i wasn't going to be stubborn and did decide to use only 1 battery, how would I make a 3.5v power supply? Do i use a potentiometer or the Ti card thingy you mentioned? is there a tutorial anywhere for this?
(i've already tried google)

also woud this charger work for the battery pack (comprising of 7 aa batteries)
http://cgi.ebay.com.au/ws/eBayISAPI.dll ... TQ:AU:1123

blaze3927 · Post by **blaze3927** » Sat Dec 13, 2008 7:52 pm

anyone?

Kyo · Post by **Kyo** » Sun Dec 14, 2008 3:11 am

no potentiometer. You'll needd a step down regulator, a resistor would be depending on the amperage drawn

blaze3927 · Post by **blaze3927** » Sun Dec 14, 2008 5:09 am

okay one prob down
now what about the charger
would an 8.4v ni mih battery charger work on 7 AA 1.2v batteries wired in series?

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portable psx original questions

ps1 original

okay one prob down