Nokia 5110 connectivity to PIC16F84A

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algelectronic said:
it's to make two MAX 232 between the PIC and the mobile and it works great ,.

ps : carful you must reverse the RX and TX in the output of the first MAX232 to the input of the second MAX232
hope it helps you
Click to expand...

Could you provide the schematic, how you connect the 2 MAX232 Chips
 
algelectronic said:
so what i've do , it's to make two MAX 232 between the PIC and the mobile and it works great ,.
Click to expand...

It will also work great with 4, 6, 8 or more MAX232s.

Of course, it can also work with zero MAX232.

Both sides are at logic level, albeit different system voltages of perhaps 3V and 5V. A simple interface will do.
 
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