A cheap and power saving simple display for battery powered projects is the Ericsson GA628 display. It is readily available and the I2C interface allows the connection also to very small micro controller.
(click to the picture)
Last update: 27. June 2005
| Ericsson Cell Phone Display GA628 |
A cheap and power saving simple display for battery powered projects is the Ericsson GA628 display. It is readily available and the I2C interface allows the connection also to very small micro controller.
(click to the picture)
|
Based on a WWW publication I found, I designed a
software written in
standard C for the MSP430 family. It can easily be modified for different micros. (be aware you will have problems to go back!) The GA628 display provides a 12 character alphanumeric
display , some icons in the
second line and power consumption of some 100 uA. It can easily be
connected to the hardware, simply by soldering some wires. The only
disadvantage is , it needs a 3.3V power supply and something around
5.6V. However,
this code and the MSP430 provides a clock for a simple charge
pump,
realized with 3 diodes and 3 capacitors.
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