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I thought I’d do another quick teardown, this time of a photo keyring we had lying around for a while.

Four screws later and we’re in.

There’s a 3.7V 210mAh Li-ion battery inside. The screen is a RFD-144A01-M30 LR and has an adjustable single LED backlight.

As this device is done for as cheap as possible (you can buy from the store for $19), they’ve gone for the chip under the blob. There are 2 crystals – I’m thinking one is a 32KHz for keeping time (because it does have a clock functionality) and the other must be for the USB and writing to the LCD. The 8 pin chip is a Winbond 25X80AVNG (PDF) which looks to be a 8Mbit flash memory where the pictures would be stored.

And that’s all for the quick teardown. I was thinking that since it uses external memory we could re-purpose this by hooking up another MCU to it, update the images then make the MCU press the arrow buttons to scroll through your images.

One Response to “Inside the Kaiserbaas Digital Photo Keyring”

  1. rickweiss says:

    You could create a library for the LCD?? It would be very good for various projects! =) Thank you!

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