I have a Medical Module which measure something and displays it on a Segmented LCD Display (very low power)
I have no idea what is the driver IC located near LCD But using Digital Oscilloscope I can see that driver uses Multiplex mode Driving and has a stair stepped waveform as you can see :
LCD has 3 Digit each Digit has 7 segment and a little "ppm" string is located at the right bottom of the LCD. here is the pic of LCD. It has 14 pin :
I think this is 3x7 Segmented LCD. Right ?
I have absolutely no idea how to detect those information. for example I want to turn a heater ON if LCD is showing a number under 100 and ... Any Idea ?
Please help me