Proxmark

Upgrading ELECHOUSE Proxmark3 Easy V3 to 512k

The popular Proxmark3 Easy has an at91sam7s256 with only 256k and e.g. it's already about 83% full with the current iceman firmware.
So I decided to attempt an upgrade.

at91sam7s512 is about [15€ on http://fr.farnell.com/atmel/at91sam7s512b-au/micro-32-bits-arm7-512k-flash/dp/1972051 Farnell].

The steps I followed to desolder and solder the new chip are basically the same as seen on this youtube video:

• heating the chip with my desoldering station
• removing the chip with a small suction pen
• putting flux on the pads
• cleaning the pads with desoldering wire
• putting the new chip and soldering some pins to lock it in place (look for aligning the small dot on the correct corner)
• putting flux on the pins
• putting solder on the pins, don't be afraid of bridges...
• removing extra solder with desoldering wire
• checking carefully for residual bridges

And voila.