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I2C converter for HD44780 LCD display
The I2C converter for the popular display with controller HD44780 for example, 2x16 characters. Thanks to this system, two data lines and supply 5 Volts and groundare enough to connect the screen.
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Description
Converter I2C fordisplay with the HD44780 controller so that the screen requires only two lines - SDA and SCL. Via the bus, from the level of theArduino, can be controlled the displayed text and the backlight, including turning them off or on at any time. On board is alsoa potentiometerto adjust the contrast.
The product is compatible with Arduino Online you can findthe Arduino libraryfor the module maintenance. |
Settings
- Converter of I2C bus
- Installed resistors pulling up the lines of the I2C bus - 4.7 k Ω
- Converter based on PCF8574 (documentation)
- Soldered potentiometer to adjust the contrast
- The ability to control the backlight through the I2C bus
- The possibility of changing the bus address via soldering jumpers A0, A1, A2
Addressing I2C
Depending on what chipset, this module can have different address spaces:
Addressing I2C
- Chipset PCF8574: 0x20
- Chipset PCF8574T: 0x27
- Chipset PCF8574A: 0x38
- Chipset PCF8574AT: 0x3F
To be sure, we recommend the use of a program for ArduinoI2C Scanner that reads the I2C addresses for all connected devices.
Leads
The system has four leads and a jumper which putting out causes turning off the backlight of the screen. On the board is also goldpin strip which is fixed to the populardisplays based on HD44780 driver. All leads are soldered.
| No. | Name | Description |
|---|---|---|
| 1 | GND | Mass. |
| 2 | VCC | Power +5 V. |
| 3 | SDA | The data line of the I2C bus. |
| 4 | SCL | Clock line of the I2C bus. |
Connecting of the display
On the back of the tile is 16-pin, male strap goldpin to solder the display based on the HD44780 controller.
Useful links
| Name | Value |
|---|---|
| Screen - interface | I2C |
| Width | 4.5 cm |
| Height | 1.5 cm |
| Depth | 9 cm |
| Weight | 0.006 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
Question: Hello, I am asking for confirmation of what I have read in the chart of this converter that it supports voltages from 2.5V to 6V. So it seems that all displays with this converter can be used for a project with Raspberry Pi Pico and there I want to use a voltage of 3.3V. Greetings
https://peppe8o.com/using-i2c-lcd-display-with-raspberry-pi-pico-and-micropython
Instructions and documents
GPSR data
Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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