Quote:
Originally posted by airspirit
Okay, so do all the LCDs with that contoller use that same 20 pin set? Also, do you need to install the pots for the brightness and stuff, or is that only if you want to fine tune it?
Is this the one here?
http://www.futurlec.com/LED/LCD240X128pr.shtml
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Unfortunately there is no "real" standard in the connections.
I know about three different 20 pin connectors for 240x128 LCDs:
1) the 20 pin connector as used on my T6963 based Powertip and also on the Datavision LCDs.
2) The 20 pin connector as used on the T6963 based Nan Ya LCDs.
3) The 20 pin connector as used on the SED1330 based LCDs.
I also found T6963 based 240x128 LCDs with a 32 pin connector as on the Truly (but as far as I investigated it should be no problem to use them too)
They do not specify the manufacturer of the LCD at Futurlec (Various?), without the datasheet it's quite difficult to judge...
The contrast potmeter is always needed. There is a temperature controlled contrast regulation on the LCD PCB itself around the manual setting of the potmeter, as the negative voltage (Vo) for the LCD is strongly dependant of the ambient temperature.
The luminosity potmeter (only with LED backlights) is optional (you could just use the appropriate serial resistor for the LEDs and leave the BL always at maximum luminosity).
With EL or CCFL backlight it's more tricky to regulate the luminosity because they are fed by a 5V invertor (comparable to the 12V invertors for CCFLs as used in case lighting).
The reset circuitry could be optional too (the switch anyway).
I know that some LCDs have the reset on power on resistor (R1) and capacity (C1) integrated on the LCD PCB, but others don't.
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