SunFounder LCD 2004 displays Characters of 4 Rows with 20 Characters in Each. (2 Pack)

SunFounder LCD 2004 displays Characters of 4 Rows with 20 Characters in Each. (2 Pack)

Q: It it possible to change the address of the lcd to have multiple lcd on the same bus?

To further expand on Wes' answer (which is excellent!), you can have up to eight (8) on the same bus, per the chip datasheets. The chips have a portion of the address hard-code (which cannot be changed) and the three remaining address lines (A0, A1, and A2) can be jumpered to ground to set seven (7) other addresses - the 8th being no jumpers. IF you happen to get one with an 8574 chip and another with 8574A or 8574T, then you could potentially have up to 16 modules on the same bus as the A and T versions use a different hard-coded address than the 8574.

Q: Has anyone run this display on 3.3 volts successfully? I'd like to use it on an 8266-12E to display the ip address.

It works on 3.3V, but just barely: it's unusably dim. I changed the supply voltage to 5V and was able to successfully drive it with 3.3V-level I2C signals, although the PCF8574 data sheet says that the minimum Vih level is 0.7 * Vcc = 3.5V. My scope says that the signals are rising to about 3.8V, so there must be some kind of pull-up to 5V on the I2C backpack board. I don't want to rely on that, so for my final design I'll use a PCA9306 I2C level shifter.

Q: Do these come with an I2C backpack? I just ordered some of these and they came with no backpack in the package.

There are several product options on the page, some have I2C, some don't. If you chose one that has I2C, it should come with an I2C backpack.

Q: Does this work for the old raspberry pis that have a 26 pin gpio?

This module uses an i2c serial interface rather than discrete gpio pins. If your rpi has an i2c, it should work.

4.4/5

ID del producto: 101853921

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⚡5V power

🔤20 chars/line

🔧Arduino compatible

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Descripción

💡 Illuminate Your Ideas with Clarity!

COMPACT DESIGN - Sleek dimensions (97 x 59 x 12 mm) fit seamlessly into any project.
DUAL PACK VALUE - Get two LCDs for the price of one—perfect for collaborative projects.
ADJUSTABLE CONTRAST - Fine-tune your viewing experience with a 50K potentiometer.
CRYSTAL CLEAR DISPLAY - Showcase 20 characters across 4 vibrant rows for maximum visibility.
MICROCONTROLLER FRIENDLY - Easily integrates with Arduino and other microcontrollers for endless possibilities.

The SunFounder LCD 2004 is a dual-pack display module featuring 20 characters per line across 4 rows, designed for clarity and versatility. With adjustable contrast and compatibility with Arduino, this display is perfect for both hobbyists and professionals looking to enhance their projects.

Presupuesto

Card Description	Dedicated
Brand	SunFounder
Item model number	SF-2X2004I2C
Item Weight	4 ounces
Product Dimensions	5.12 x 5.12 x 0.79 inches
Item Dimensions LxWxH	5.12 x 5.12 x 0.79 inches
Color	2X2004LCD
Processor Brand	sunfounder

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It it possible to change the address of the lcd to have multiple lcd on the same bus?

Has anyone run this display on 3.3 volts successfully? I'd like to use it on an 8266-12E to display the ip address.

Do these come with an I2C backpack? I just ordered some of these and they came with no backpack in the package.

Does this work for the old raspberry pis that have a 26 pin gpio?

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SunFounder LCD 2004 displays Characters of 4 Rows with 20 Characters in Each. (2 Pack)

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