yampp Discussion Board

2 points:-

1) Although a lower temperature suggests that the drive wastes less energy, I can't see how it means the drive uses less power. Surely the power depends mainly on the motor, i.e. how much it takes to spin up to speed and how long it has to run for.

2) In that picture with the 1A hard drives. That seems quick high, so maybe it means that the power supply should be able to source that current if needed, but i doubt it runs at that the whole time.

Just my 2 cents

Pete

Nice case, but it looks as though the buttons would be quite hard to press to that position...

Has anyone acutally made a yammp7 with the joystick avilable in the shop?

Pete

True. Do you need 2 or 4 channels? (are X+,X- grouped and y+, y- grouped?). What size screens did you use and did you add the touchpanel on top or get an lcd with it already in?

If you've got the circuits lying around then that would be great (I'll IM you my email - don't want spambots getting it)

Thanks for the help

Pete

Has any one ever tried this? It doesn't seem too difficult. There are SPI chips (MXB7843) chips which can handle 4 wire touch screens (resistance based). The trouble seems more to be with actually getting touch panels small enough. The best I could find are:-
-here
-and here

Pete

PS before anyone comments. I know that I have lots of ideas and don't get much done. However, I (think) that I understand most stuff pretty well, its just my construction techniques that I don't have confidence in :X - idealy I'd be able to send my designs off to some shop which would assemble a 1 off for me for less than a ridiculous price

That's pretty cool! Unlike a lot of other car installs, you've got it nicely integrated so it fits in.

How did you interface on to the main lcd like that? Does BMW publish a standard

Pete

The FAQ could be some kind of wiki (likes run at http://www.mega-tokyo.com/os/) with user contributed info...

Anyway, back to topic?

Pete

Thanks, but just to clarify of those 5 results:-
- 1 was this thread
- 1 was in a language that I don't understand
- 1 was a poll which noone voted on or answered
- 1 you'd replied to and told the person to use the search
- The last one mainly disscussed availablity of the chip and the problems with available information and errata in early versions of the chip BUT this was posted in 2003

So, Digikey seem to be selling the chip for £9.95 (cheaper than before), and the docs on the Atmel site say that they've been updated recently. And I was wondering if any one had tried the chip since it was previously disscussed. Someone (a guest called Marc) said that he'd got some samples but didn't mention any success or not, are you still around? Any comments?

Pete

MIC: It always seems to be you who goes and tells people to SEARCH or RTFM etc. And I admit a lot of the time its appropriate but you just seem a bit "trigger happy".

EDIT: Just looked at the Atmel site, and it claims to have updated the datasheet since new year (Revision H)... reading now.

This isn't a Yammp specific h/w question, but as there aren't any general boards around at the moment, I thought this was the best place to post.

Has anyone ever tried this chip (AT89C51SND1C) or any of the other *SND1Cs? It sounds as though its the perfect solution for a mini portable player. It includes:-
- IDE / CompactFlash Interface as well as a MMC interface.
- USB interface which can be used for ISP
- MP3 Decoder (and when the 2C comes out - don't know when, atmel haven't replied to my email yet - also a DAC and amp)
- Very cheap compared to VS1001 - £9.95 from Digikey

I'm interested in trying this product out, but wondering if anyone had any experience.

Pete