attiny85 lcd display brands

This project demonstrates the ability of the Wokwi Arduino simulator. You can write code on ATtiny85 to drive an LCD2004 (4 rows, 20 column hardware) by yourself. You can learn to program as well as see the code in action. No hardare needed.

Using an LCD on a small chip like an attiny85 is not really that hard and till recent I didnt even think it warranted an instructable, but I have received questions about it, so I may as well expand on the process.

With the attiny only having a max of 6 pins available, it goes without saying that it cannot directly control all the pins of the standard Hitachi based LCD"s

A little bit over a year ago, I described how to add an LCD to an Attiny or other chip, using only 2 pins. That circuit made use of an HC164 shift register, but as I2C modules for LCD"s are extremely cheap and even LCD"s with a module already in place also are dirt cheap, one might as well use I2C on the Attiny85.

I2CThe attiny85 can simulate I2C on PB2 (pin 7) (SCL) and PB0 (pin 5) (SDA). The "Wire" library that is used to read and write bytes from and to the I2C port on the arduino doesnt work on the attiny. It needs the TinyWireM library to act as an I2C master

The "NewLCD" library from Francisco Malpartida is my favorite library, but also that one fails in using I2C for the Attiny because it makes a call to the Wire library. A modification to make it work with Attiny85 can be found here.

The "Bro Hogan" library however does work. It is basically the same library as the standard arduino LCD library, but it is modified to recognize the Attiny85 and the Attiny2313 and then makes a call to "TinyWireM" rather than "Wire".

Adafruit also provides a libray that works with the Attiny85 and that is described in another instructable. I will be using the Bro Hogan library here.

Most problems you may encounter are related to the IDE getting confused regarding the libraries. If you are using the standard Arduino LCD library, best replace it by the Bro Hogan library. If you are using Malpartida"s library and want to keep that (as it is a great library), move it out of the way. Grab the entire folder and move it out of your sketchbook/libraries folder. Make sure you have the TinyWireM library installed and make sure your libraries are up to date.

Now obviously there is no bootloader for the attiny85, but the process of burning the bootloader sets the fuses of the attiny from factory mode, to the mode you want to use it in. So, presuming you use the Arduino as ISP,:

You can basically develop on Mega, Uno, etc, and simply select ATtiny85 and compile-and-burn with more libraries than in any other Arduino package. SPI, TWI, 1-Wire etc are all support. LCD support is an abstract class that is implemented for HD44780, PCD8544, ST7565. The HD44780 driver also has an adapter layer for 4-bit parallel, Shift Register 3-wire (Pin or SPI), Shift Register 4-wire and a whole range of different I2C adapters. You can see how the configuration works in the CosaLCDsize sketch above.

The Experiment: ATtiny Based Wireless Weather Station Remote LCD Display. Build a 433Mhz wireless weather station remote serial LCD display around an Atmel ATtiny85 micro-contro…

The actual manufacture part number is ATTINY85-20PU. It always tends to look like a lot of part numbers, but often it boils down to tape and reel vs tray, temperature ratings, and packaging. Sometimes you will even get different part numbers based on the default configuration (running at the full 20MHz, running at 1/2 clock speed at 10MHz, or using an external crystal for example), even though the actual chip is the same. For their naming convention usually you can find that in the ordering information at the bottom of the datasheet.

Finally the 85 appears. SparkFun is in the U.S., so I"m guessing PIC fan boys. AVRs not on the brain. - I"d like to see an ATtiny parts kit including ATtiny85, 20MHz crystal, crystal caps, bypass cap, and maybe a six pin ISP header. Even if these parts aren"t kitted the related products list below should include them. Nope, now I gotta go hunting; or maybe that"s the idea :-(

I just confirmed that the ArduinoISP can be used to program the SMD SMT version of the ATTiny85 chip. I used the Arduino 0022 IDE and board definitions and older version of the instructions from MIT High Low Tech. (The updated instructions for Arduino 1.0 fail for me.)

I"m trying to control a strip of a single Neopixel with an Attiny85 @ 16Mhz (internal PLL, 4.3 V BOD) but it just doesn"t work. the example "strandtest" just makes the led stuck in green, any help? i"m just connecting the data cable of the neopixel to the Pin 7 (PB2) in the Attiny, i also try putting a resistor in this, but it doesn"t help.ATTINY85

Yep! The ATtiny85 ships with a fuse that makes them operate at internal 1MHz. That fuse can be changed to operate at 8MHz internal. If you need to go above that (or need better precision than the internal oscillator) you can set the fuses to operate with an external oscillator. 20MHz is the maximum external oscillator allowed.

(see: http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&pa=107166&productId=107166&keyCode=WSF&CID=GOOG&gclid=CI2TocLm6rICFexAMgodOU0ALQ for the

Hi all! I"ve recently bought two of these Attiny85 chips. I followed the MIT hi-low tech-group instructions on using Arduino as an ISP to program the chips.http://hlt.media.mit.edu/?p=1229