USB Universal LCD backpack design

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Contents

Overview

  • Potential to support lots of character and graphic LCDs
  • serial to parallel approach
  • inexpensive, common parts
  • well documented drivers
  • 3v3 or 5v0 operation
  • FT232RL full breakout (CBUS and DBUS pins)

Hardware

FT232R

Uni-usb-lcd-ft232-diagram.jpg

74HC595

Uni-usb-lcd-74hc595-diagram.jpg

LCD

Uni-usb-lcd-backlight-diagram.jpg

Uni-usb-lcd-VEE-diagram.jpg

  • Contrast
  • Backlight Vee select
  • Backlight resistor
  • Backlight current limiter

Partlist

Usb-lcd-cct.png

Usb-lcd-pcb.png


PartQuantityValuePackage
C1110uFSMC_A
C2-C650.1uF0603
F11500mA poly fuse 1206L
IC11FT232RLSSOP28
IC2,IC3274HC595SO16
IC41TPS2041BSOT-23-5
JP1-220.1” MALE PIN HEADER 01X31X03-S
LED1-22LED0805
R1-R22270R0603
R3 110K potentiometerBP25P
R4110K0603
R51100R potentiometerBP25P
USB11USB MINI-B SMDMINI-USBB

Software

  • Install drivers

Pin connections

  • table of pin connections
  • serial to parallel approach

Test app

  • Currently a test app, partial LCD Smartie driver...
  • Test the app (.net v4 required)

Get one

Available now at Seeed Studio for $15.

Attach.jpg

Uni-usb-lcd-overview.jpg

Uni-usb-lcd-front.jpg

Uni-usb-lcd-back.jpg

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