[Sarah1331]

Originally Posted by digiprog yes ofcourse sarah.. u know educational purpose only :P

Am sure you could add a 3.3v adaptor to the clip it's self to get your feed just for testing lol


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[digiprog]

Originally Posted by Sarah1331 Am sure you could add a 3.3v adaptor to the clip it's self to get your feed just for testing lol Sent from my iPhone 5 using Tapatalk

yepp .. i just wish the skeet arrives already ..

[domelec]

Originally Posted by Sarah1331 No you woudnt if you powered it from the console and not the skeet it's still grounded and powered from the console or ex psu Same for nor but like I have said eairler nor needs external power ( I know you didn't say you didn't) Sent from my iPhone 5 using Tapatalk

i think i have said about enough then in this thread
and guess i must know nothing about downgrading
sorry to bother to you

[Sarah1331]

Not downgrading but simple electronic bro


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[domelec]

Originally Posted by Sarah1331 Not downgrading but simple electronic bro Sent from my iPhone 5 using Tapatalk

im not stupid
if u have an external psu the u have 2 wires for that power source to work
1. 3.3v
2. gnd

therefore u must connect both to Y adapter
or the clip dont work cos no power will be working
i think u are getting confused in what i am saying but like i said i think i have said enough now in this thread ( i dont want it to turn into an argument)

and for the record im an electronics engineer too

[Sarah1331]

Originally Posted by domelec im not stupid if u have an external psu the u have 2 wires for that power source to work 1. 3.3v 2. gnd therefore u must connect both to Y adapter or the clip dont work cos no power will be working i think u are getting confused in what i am saying but like i said i think i have said enough now in this thread ( i dont want it to turn into an argument) and for the record im an electronics engineer too

I don't mean to get your back up pal
Guess we both mean same thing and putting it different ways

Sorry pal


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[underwurlde]

Ooo, here I go again:

The 'transistor' you speak of is a REGULATOR. Standard 3 pin device: Vin, GND, Vout.

I recognize them as being LM1117-3V3 in an SOT-223 package. The datasheet for this LDO regulator suggests that it is capable of passing up to 800mA, however this is the rating of the silicon - the small package and the lack of heat-sinking (which is not even provided by increased copper around this regulator) suggests that continuous current rating would probably be under half this.

P=IVdrop. So if we need 1.5A and Vdrop is 5.0-3.3 = 1.7 gives 1.7 x 1.5 = 2.55 Watts!!! In case you are wondering THAT IS A LOT for a SOT223 package.

350mA is fine though, SOT223 should be OK at 600mW.

For the record, there is a simple technique where by a Power Transistor can be used to by-pass the regulator but at the same time use the regulator for it's intended job, that is to provide a REGULATED supply rail at a fixed voltage (in this case 3.3V).

Anyway all of this is academic in my mind. There are some high-current 3.3V power sources already on the PS3, so why dick about (with things like ATX power supplies) when one is already there to be used.

Andy

[domelec]

because on most nand consoles u cant use the solderless clip on with the ps3 psu connected

ie the sem-001 has 1 nand under the psu therfore needing an external source

[Sarah1331]

Originally Posted by underwurlde Ooo, here I go again: The 'transistor' you speak of is a REGULATOR. Standard 3 pin device: Vin, GND, Vout. I recognize them as being LM1117-3V3 in an SOT-223 package. The datasheet for this LDO regulator suggests that it is capable of passing up to 800mA, however this is the rating of the silicon - the small package and the lack of heat-sinking (which is not even provided by increased copper around this regulator) suggests that continuous current rating would probably be under half this. P=IVdrop. So if we need 1.5A and Vdrop is 5.0-3.3 = 1.7 gives 1.7 x 1.5 = 2.55 Watts!!! In case you are wondering THAT IS A LOT for a SOT223 package. 350mA is fine though, SOT223 should be OK at 600mW. For the record, there is a simple technique where by a Power Transistor can be used to by-pass the regulator but at the same time use the regulator for it's intended job, that is to provide a REGULATED supply rail at a fixed voltage (in this case 3.3V). Anyway all of this is academic in my mind. There are some high-current 3.3V power sources already on the PS3, so why dick about (with things like ATX power supplies) when one is already there to be used. Andy

Pedantic post of the day goes to ...

Am only a noob leave me alone


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[underwurlde]

^ Learn something new every day. Never bothered with all that bloody wiring and use of cr@ppy clips. I just remove the NANDs, stick 'em on a PCB for direct connection to a ProgSkeet v1.2 which until recently DID NOT WORK for me. B@st @rd does now though

Andy
************* [ - Post Merged - ] *************

Pedantic post of the day goes to ..

Me? Me? Sir! Me???

LOL

Just a spreading the knowledge dude.
Not that anyone wants it, but I like a stage.

Andy