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UNDER CONSTRUCTION
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Links
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This is the final result,
having the LCD display the text you want to. |
LCDs with
PICAXEs
HD44780 info
Great articles re: LCD
The
LCD shown here
Using two wires to
control LCD
Home
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The image on the left shows the
curcuit I used to control the LCD. Note I've used a PICAXE Microcontroller so
you only need the PC to program the PICAXE then you can disconnect the PC
completely |
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If a messy desk is a symptom of a messy
mind, then I prefer to have a messy desk rather than an empty one! |
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I used a standard non-backlit Ampire 162B LCD module that
I purchased from Dick Smith Electronics (~A$20). If you want backlighting then
you'll need the backlit version which costs A$10 extra.
This particular LCD is HD44780 compatible so there is lots of
information available about it. Note, this LCD module has a firmware driver but
no serial controller. This means you will need to feed it 'nibbles' (half a
byte) to tell it what to do. You can see in the photos that I have connected
four orange wires on the right these communicate the nibbles from the chip to
the LCD. The wire on the left are power (left two) and control (next three)
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| I have now made up a
prototype board with the same curcuit as above. |
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The
connector I used for the LCD was a "66" 12 pin SIL from Dick Smith (cost $2.98) |
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You can see here that I'm
using the PICAXE 18X to drive the LCD. I still have a 10K pot (in blue) to
control contrast. I also have installed a stereo socket to allow new software
to be "downloaded" to the PICAXE and to allow other modules to feed info to the
LCD. Since the 18X happily consumes serial input you can just send serial text
and it will display on the LCD |
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Another shot, shows the
4xAA power supply. (Note the case under the LCD is only for support and not
power) |
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