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Circuit Notebook

Interesting circuit ideas which we have checked but not built and tested. Contributions from readers are welcome and will be paid for at standard rates.

PICAXE drives
Nokia LCD

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This circuit and the accompanying BASIC program demonstrate how to interface an old Nokia mobile phone liquid crystal display to a PICAXE microcontroller. While the complete unit could be used as a stand-alone serial LCD module, the circuit and program could also be integrated into an existing PICAXE project – assuming that there are sufficient port pins and memory space available!

A Nokia 5110 mobile phone was used as the source for the LCD module. These are identified by type number LPH7366-1 and have nine connections. Displays from the 3210 and 3310 models may also be suitable, although these haven’t been tested with the program.

The LCD is an 84 x 48 pixel graphics type with an "SPI" type serial interface. Table 1 shows the pin assignments when looking at the back of the module and reading from left to right. Note that the 3210 & 3310 displays omit the "OSC" pin, which isn’t used for this application.

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