Fredrick, You can also use the -9 volts from an RS-232 interface ic if you are using a serial interface to your computer for boot loading.. I do this quite often.
Dave Purola,
N8NTA
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Fredrick, You can also use the -9 volts from an RS-232 interface ic if you are using a serial interface to your computer for boot loading.. I do this quite often.
Dave Purola,
N8NTA
|
I use a USB interface with a FTDI RS232 chip on the board.
I will try first and just connect it to GND and se whatīs happends.
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Just connect the Vo to GND doesīt work, all the "pixels" on the display are showing but no text.
I think this display needs negative voltage for LCD driving..
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Try connecting as the manual shows with a pot as a voltage divider, then try adjusting until the display is clear.Originally Posted by Fredrick
Just connect the Vo to GND doesīt work, all the "pixels" on the display are showing but no text.
I think this display needs negative voltage for LCD driving..
Dave
Always wear safety glasses while programming.
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The display i working now but itīs slow.
The problem was that i have forgot to connect the "Enable" signal, i checked the connections severel times before i notice that. I have must been tired
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Do not tell anyone, but I made a similar mistake awhile back.The display i working now but itīs slow.
The problem was that i have forgot to connect the "Enable" signal, i checked the connections severel times before i notice that. I have must been tired
Dave
Always wear safety glasses while programming.
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