Tag Archives: display

7 Segment LED Based SPI Display using 74HC595

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Single Digit Big Display module using 74HC595 IC project will display large size 7 segment single digit number. 3.5inch height, which can be visible over large distance.  More digit can be connected serially to each other easily connector.

This circuit is a single digit seven segment big display using a set of 5 LEDs per segment and a shift register for easy control by micro-controller input. Each of the LEDs used in this project are 5mm high glow type.

Specifications

  • A ULN2003 IC helps sink higher current flowing through the LEDs to ground.
  • Resistor R1 to R8 are current limiting Resistors for the LEDs connected in series.
  • CN1 Connector is Data In connector
  • CN2 Connector is optional Data Out Connector if you need to stack more than 1 single display board in series
  • +V CN1 & CN2 should be connected to higher voltage to drive the LEDs
  • VCC Should be connected to 5V DC. This supply can be source from host controller
  • Each Segment made up of 5LEDs

7 Segment LED Based SPI Display using 74HC595 – [Link]

4 digit charlieplexed segment display

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bobricius @ hackaday.io has designed an ultra thin custom display, requiring only 6 gpio pins to drive 30 leds.

FEATURES:
– 1.05×0.48 inches (26.67×12.22 mm)
– 30 led
– any color
– ultra thin …. etc. on 0.8mm board
– only 6 gpio
– ideal for wrist watch

4 digit charlieplexed segment display – [Link]

An Atmega library for multiple HD44780 LCDs

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Davide Gironi has posted an I2C multiple HD44780 AVR Atmega library:

This library implements a driver for HD44780 lcd connected through PCF8574 port expander.
Data is transmitted using only 2 wire over i2c with the PCF8574.
This library can drive up to 8 LCD concurrently.
Lcd driver is based upon Peter Fleury’s lcd driver
HD44780 to i2c library its based upon this library

An Atmega library for multiple HD44780 LCDs – [Link]

Make Your Own Smartwatch From An Old Cell Phone

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Have an old cell phone laying around? Don’t know what to do with it? What if I told you that you could turn that old cell phone into a smartwatch!

What I’d like to do for this crazy/ambitions project is turn an old cell phone into a smartwatch. So obviously an old cell phone is required. The primary reason for this project is simply that I had an old cell phone laying around and wanted to find a creative way to repurpose it. The one I had is a Nokia 1100, but most other old cell phones would work, so long as you can find the schematics for the LCD online

Make Your Own Smartwatch From An Old Cell Phone – [Link]

RELATED POSTS

Arduino-compatible touch-enabled display shield from FTDI

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CleO is a simple to program, intelligent TFT display solution that allows the construction of human machine interfaces (HMIs) with – says maker FTDI chip – much higher performance than conventional Arduino display shields are able to deliver. by Graham Prophet [via]

FTDI first introduced its Arduino-compatible concept – aiming to reach a wider audience – by means of a crowdfunding exercise. The company now has full availability of the CleO product (and accompanying accessories) through its distribution partners, as well as directly via the company’s website. FTDI Chip will also give engineers complete access to a comprehensive development resource, which has step-by-step tutorials and projects, plus a series of software tools. In addition, a new forum has been set up ( www.CleOstuff.com) on which design tips, application ideas and other information can be shared.

How to Scroll a single LCD line – Arduino

R Jordan Kreindler show us how to scroll a single line on a LCD display.

The Liquid Crystal Library has two quite useful functions scrollDisplayLeft() and scrollDisplayRight(). These functions scroll the whole display. That is, they scroll both lines on a 1602 LCD and all four lines on a 2004 LCD. What we often need is the ability to scroll a single line on these displays rather than the whole display. Also, we often want to scroll an entire line off the screen rather than just by one position, as the functions in the Liquid Crystal Library offer. This Instructable provides functions to do just that, and so should be thought of as an addition to the scrollDisplayLeft() and scrollDisplayRight() functions in the Liquid Crystal Library.

How to Scroll a single LCD line – Arduino – [Link]

1.8″ DIY Photo Frame using and Arduino Nano and a ST7735 Color TFT display

In this video educ8s.tv is  going to show us how to use the SD card slot of the popular 1.8″ Color TFT display which uses the ST7735 driver. Then we will save some bitmap images in the SD card and we will display them on the display. In other words, we will build a simple Photo Frame using Arduino!

If you have watched some of my previous videos, you may have noticed that I use this 1.8” color TFT display a lot recently. The reason for that is that this display is very easy to use, it costs less than $5 and it offers color! At the back, the display has an SD card slot, so I thought that we have to learn how to use that as well. As it turned out, it is really easy to use the SD card slot of the display! That makes this display even better.

The project that we are going to build today is this. A simple photo frame which loads images from the SD card. I have placed some .bmp images in the SD card and the project loads them and displays them at the display in full color! As you can see the speed of the project is very high if we take in consideration that the brains of this project is the old and slow Arduino Nano. In my opinion, this is really impressive. But let’s now see how to build this project.

1.8″ DIY Photo Frame using and Arduino Nano and a ST7735 Color TFT display – [Link]

3.5″ Color TFT display ILI9481 on Arduino Uno and Mega

In this video we learn how to drive the new, low cost big, 3.5″ Color TFT display for Arduino Uno and Mega.

A few weeks ago, I discovered this promising new display on Banggood.com and thought that it might be useful in some of our projects. The price of the display is very low for such a big display, it costs 10$ and banggood.com was kind enough to send me a sample unit in order to test it and share my opinion about it with you.

3.5″ Color TFT display ILI9481 on Arduino Uno and Mega – [Link]

6 Digit Serial Display Driver with CAT4016

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6 Digit serial display project has been designed around CAT4016 IC from ON semi. The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4 V (for 2 to 100 mA LED current) allows for more power efficient designs.

A high-speed 4-wire serial interface of up to 25 MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface.

Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.

Features

  • 6 Digit 1 inch 7Segment Display
  • Supply Input 3V to 5.5V
  • Serial interface up to 25 MHz clock frequency
  • LED current 20mA (Range from 2 mA to 100)
  • LED current set by external RSET resistor
  • 300 mV LED dropout at 30 mA
  • Thermal shutdown protection
  • R1,R2,R3 Current Set Resistors

6 Digit Serial Display Driver with CAT4016 – [Link]