The old display contrast used -5V to 0V. The new ones needs 0V to +5v.
You need to cut one of the legs from the pot Patrice mentions and connect to +5V
Send me your email address and I can send you a photo of one I modified...it's quite easy and the final result is superb :-)
You need to cut one of the legs from the pot Patrice mentions and connect to +5V
Send me your email address and I can send you a photo of one I modified...it's quite easy and the final result is superb :-)