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Crazy IPod charger idea, need help. - Page 2

post #16 of 21
Thread Starter 
Well that clarifies things a bit beter, but the same old question... Did you try feeding your IPod ~22VDC and did you use accessory detect while doing it?
post #17 of 21
Ah, now I get it!

Yes I fed the Ipod 22.15 V and it didn't blow up.
At least not immediately, that is. I ran into some problems with the ipod later on that may or may not be related.
I now use a generic 12V wall adapter.

No I didn't use acessory detect since I didn't know about it at that time.
Though recently I did put a 1M resistor (21 to GND) into the original Ipod dock to get power-off on disconnect.

Also, I'm skeptic if the internal regulator is bypassed without acessory detect. Where do you take that from?
Because the similar Wofson Dacs only take up to 3.6V DC, some regulation has to take place somewhere even if you input the standard 12V.

Here are some further arguments, for it being safe to run the Ipod on >12V:
-There is a report on the forum of successfully running the ipod from >20V and no accessory detect was mentioned (You'll have to search for it I don't have the link).
-Naim sells a 24V ipod adapter called the iSupply, comercially and I couldn't google any reports of it blowing up Ipods.
- Most importantly: The FW specs definitely allow up to 30V and the Ipod can be run off FW without accessory detect.

I think these far outweigh my above mentioned suspicion, and you should be safe.
But it's your Ipod, so it's your decision.

Welcome to the Destroy-It-Yourself forum.
post #18 of 21
Thread Starter 
Sounds good, I'll probably end up trying to build a 2.1mm DC jack into an IPod dock connector for at home charging (I don't have any wall charger, just USB which takes forever and I gotta have my computer running).

Just curious, what was the "unrelated issue" that you had with your Ipod later?
post #19 of 21
Quote:
Originally Posted by FallenAngel
Sounds good, I'll probably end up trying to build a 2.1mm DC jack into an IPod dock connector for at home charging (I don't have any wall charger, just USB which takes forever and I gotta have my computer running).
That's what I did also. But the connectors were not so readily available then, so I had to take apart the original FW cable.

The problem that I had several months after the failed TREAD experiments was that the I the Ipod developed enormous DC offset on the lineout.
For some time I suspected that it was a result from connecting the Pimeta and the Ipod to the same TREAD.
I don't think so now and I've already warned you from that.
post #20 of 21
Thread Starter 
Damn, that sounds serious.

Hopefully it wouldn't happen to mine, but I'll probably give it a try once I get all the parts.
post #21 of 21
Well, as I said, it was months in between so I'm not sure whether the issues are related.

Good luck and keep us posted!
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