Cpl Rampage

ok here is the problem:

i designed this setup to charge my ipod, and include a amp and speakers. and would be powered by either a battery or a wall wart.

so i took apart one of those cheep pc speaker setups, a firewire port, a dpdt swich and a battery. i wiired it up like the schematic below.

it works great from bothe battery and ac power when i only use the speakers or charging the ipod. but when i have the speakers on, and then i plug in my ipod, i get static in the speakers.

i am guessing that the ipods charging curcuit causes ripple on the line. it happens both when i use the battery and when u use ac.

oh, and the speakers are sheilded, so its not that

can i just put a cap between the lines of the firewire port?

If any of the electonics pimps can help me it would be apreciated.

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Cpt.Planet

Quote: Originally Posted by Cpl Rampage ok here is the problem: i designed this setup to charge my ipod, and include a amp and speakers. and would be powered by either a battery or a wall wart. so i took apart one of those cheep pc speaker setups, a firewire port, a dpdt swich and a battery. i wiired it up like the schematic below. it works great from bothe battery and ac power when i only use the speakers or charging the ipod. but when i have the speakers on, and then i plug in my ipod, i get static in the speakers. i am guessing that the ipods charging curcuit causes ripple on the line. it happens both when i use the battery and when u use ac. oh, and the speakers are sheilded, so its not that can i just put a cap between the lines of the firewire port? If any of the electonics pimps can help me it would be apreciated.

Your speakers may be shielded but what about your wiring?

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Cpl Rampage

Oops, forgot the schematic.

and the wire is hook up wire, i had lieing around, except for the wire that leads to the firewire port, that is 2 strands from a cat5 wire, could that be the cause?

Attached Thumbnails

 

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Cpt.Planet

Quote: Originally Posted by Cpl Rampage Oops, forgot the schematic. and the wire is hook up wire, i had lieing around, except for the wire that leads to the firewire port, that is 2 strands from a cat5 wire, could that be the cause?

Probably. That type of cabling doesnt really have any sheilding. The only reason its sheilded in a network cable is because of the twists.

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Cpl Rampage

Quote: Originally Posted by Cpt.Planet Probably. That type of cabling doesnt really have any sheilding. The only reason its sheilded in a network cable is because of the twists.

ok i am gonna go change out the wire. hopefully it works, ill be back

EDIT: S**T when i was trying to kake off the cat5 wire, the solder tab on the fire wire port broke off, i dont thonk oill be able to get another one soon, F**K

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Cpt.Planet

Quote: Originally Posted by Cpl Rampage ok i am gonna go change out the wire. hopefully it works, ill be back EDIT: S**T when i was trying to kake off the cat5 wire, the solder tab on the fire wire port broke off, i dont thonk oill be able to get another one soon, F**K

Man that sucks. Ill see i think i might have a firewire port from a pci bracket.

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Cpl Rampage

Quote: Originally Posted by Cpt.Planet Man that sucks. Ill see i think i might have a firewire port from a pci bracket.

yah, i got another one, of a dead mobo, hooked it up backwards, and ****ed up my ipod, now it like cuts out an intire part of the sound spectrum, like u can only hear the guitar, or only the drums or what not. i am gonna be in so deep sh*t, i got it from my parents at christmas, they ant gonna be happy.

i would be willing to buy any ipod for cheep

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Human Traffic

got warranty on that? Surely they won't be able to trace that its your fault!

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Cpl Rampage

Quote: Originally Posted by Human Traffic got warranty on that? Surely they won't be able to trace that its your fault!

nope, got it for christmas a few yrs ago

i found out how to open up minis, and i looked around in mine (omg are the traces small). and after a little bit, i found a black spot, on a small pcb by the headphone jack, so luckly it was not on the mainm pcb, i have been looking on ebay for a broken ipod mini, that i could maby retreave parts from.

if any 0one has an ipod, mini or regular, working or broken, i am in the market.

EDIT:

i just won a auction on ebay, got a new main pcb, and the audio jack pcb that burnt out, so just cross your fingers, and hope i can get all functionality back when it gets here

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