🔒
A knob opens and closes a vent
The servo follows the potentiometer; DHT22 humidity goes to the LCD.
dht22lcd1602_i2cpotservo
Display
LCD1602 with PCF8574 I²C backpack (4-pin header)
lcd1602_i2cI²C0x275 V logic
Why this support circuit is added
5 V logic I²C; needs a bidirectional level shifter with a 3.3 V MCU.
Grounded in the catalog and golden patterns (real open-source circuits). Every auto-inserted part comes with a reason.
Support circuit added automatically0
No extra support circuit for this part — only the board rail and the connector are wired.
InterfaceI²C
- Catalog id
- lcd1602_i2c
- Category
- Display
- Protocol
- I²C
- I²C address
- 0x27
- Address select
- Yes (jumper / SDO pin)
- Logic level
- 5 V
Firmware detection1
Any of these #includes identifies this part
#include <LiquidCrystal_I2C.h>
Examples using this part
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