Hi,
I have a lot of unknown LCD displays (intelligent, HD44780 based), and many of
them have anode (A) and cathode (K) connections. I was wondering generally
how to use them. Are they for a backlight? Do I need to supply a negative
voltage, and if so, what kind of negative power supply do I need?
I've attached a pic of the A and K connections for one of the lcds I have.
The A pad is close to a + supply pad and the K pad is close to a GND pad,
and it seems they are positioned for easy mounting of smd parts.
Thanks,
pc88
I have a lot of unknown LCD displays (intelligent, HD44780 based), and many of
them have anode (A) and cathode (K) connections. I was wondering generally
how to use them. Are they for a backlight? Do I need to supply a negative
voltage, and if so, what kind of negative power supply do I need?
I've attached a pic of the A and K connections for one of the lcds I have.
The A pad is close to a + supply pad and the K pad is close to a GND pad,
and it seems they are positioned for easy mounting of smd parts.
Thanks,
pc88