Alphanumeric Led Display Driver Ic

Example of 64 pixel display.

Alphanumeric led display driver ic.

The technology produces low threshold enhancement mode and ion implanted depletion mode devices. In this post i ll show how a single alphanumeric display can be driven by pic16f877a micro controller. There are dedicated ic s for this purpose however a micro controller can be programmed to perform this task. It is capable of driving sixteen 7 segment eight 14 segment eight 16 segment or 128 separate leds.

A 5 pin connector for all of those leds indicates that the entire led driving circuitry is built in. The max6955 is a compact display driver that interfaces microprocessors to a mix of 7 segment 14 segment and 16 segment led displays through an i 2 c compatible 2 wire serial interface. The max6955 is an led display driver with an i 2 c compatible serial interface capable of supporting fast mode speeds up to 400khz. A single pin controls the led display brightness by setting a reference current through a variable resistor connected to the supply.

The other answers give great suggestions but to add to them you could consider the max7219 driver chip. I have a page about using it. Pic16f874p alphanumeric led display driver circuit board with microcontroller builds on the applied bred led display 74hc238 74hc238 is driven by com also has a connection with max233 pcb printed circuit drawing in addition to the eagle there. Normally numeric leds and alphanumeric leds have 8 to 18 pins that need to be connected to power current limiting resistors a transistor if multiplexed and a display driver chip.

The mm5450 and mm5451 led display drivers are monolithic mos ic s fabricated in an n channel metal gate process. It can drive a 8x8 pixel display like one alphanumeric character or 8 x 7 segments displays a 7 segment display usually has a decimal place so that is really an 8 led display. The max6954 is a versatile display driver capable of controlling a mix of discrete 7 segment 14 segment and 16 segment led displays through a serial interface. The max6955 drives up to 16 digits 7 segment 8 digits 14 segment 8 digits 16 segment or 128 discrete leds while functioning from a supply voltage as low as 2 7v.

This application note describes a 14 segment application circuit and an example program that continuously scrolls the message. By using a microcontroller you ll get a more flexible design not limiting the characters being displayed or additional functionality that can be easily added by modifying the code.