Thread: LCD Doesn't work :(
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Unread 07-03-2007, 14:50
EHaskins EHaskins is offline
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Re: LCD Doesn't work :(
EDIT: YOU DO NOT WANT THE CONVERTER CHIP!!!!!!

The chip is converting from TTL to rs232. The backback uses TTL.
The wires on the TTL converter chip do not have power. They are rx/tx/gnd( I don't know the order). Get power from a digital IO, and then try it with just the rx pin of the backback to the TX of the RC.
Do what i said below, and if it still doesn't work you may have damaged the backback.
/EDIT
Get power from a digital io. Don't connect the LCD to the serial port, just power. You should get:
SparkFun
SerLcd 1.0
or somthing similar. If you backback has been configured differentially it may not show the message, but its backlight should come on.

If you get light or message then connect just the rx pin to the tx pin of the TTL port.

Other than that I have used that device on an EDU and Vex without any issues.
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Eric Haskins KC9JVH
Last edited by EHaskins : 07-03-2007 at 14:56. Reason: typo in my edit