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.