16x2 LCD Display Custom Characters Circuit

Posted on Feb 5, 2014

The schematic for this tutorial can be seen drawn out below. It includes everything you`d need to wire up for the tutorial to work. PIC programming circuitry is not included in the schematic as I`m assuming either you`re programming the PIC out of circuit or can add the few elements into the circuit on your own for in-circuit programming. The 16x

16x2 LCD Display Custom Characters Circuit
Click here to download the full size of the above Circuit.

2 LCD interface has 8 data bits (DB0~DB7) and 3 control pins (RS, R/W*, E). The data bits are connected to the 8 pins of PORTD on the PIC. A special note to take is that the LCD data pins match the PIC pin-numbers. The control lines are connected to the lower 3 bits of PORTB on the PIC. As mentioned in the parts list, the 5k trimpot will control the contrast for the LCD. The schematic above shows you how the trimpot should be connected to the LCD, Power and Ground. After it is connected when you turn the trimpot dial characters on the screen will appear lighter and darker. Most 16x2 LCD`s have a backlight LED unless you opted to save a few bucks. There`s nothing special about these two pins (15 and 16). Slap a resistor infront of anode and connect the cathode to ground and immediately the backlight should turn on.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Lamp-Switching Circuit Circuit
    ultra miniature transmitter
    tone control circuit designed
    Smart power grid demands innovative design
    Secondary-Side Optocoupler Driver
    The L3 Wire-amplifier NH19-6112