For arduino IIC/I2C Interface LCD2004 LCD screen adapter plate containing
For arduino 328 series panel IO port is only 20 , plus some sensor , SD card Han, relay modules and more , IO port is not enough,
The original 2004 screen requires 7 IO port can drive up , we have developed this module can help you save five IO ports, we send For arduino library
1 Power supply voltage : +5 V
(2) support the I2C protocol
3 with backlight and contrast adjustment potentiometer
4.4 Line Output easier.
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