and the address can be modified using the three links A1, A2, A3
just below the contrast pot. see the PCF8574 datasheet for details
On 13/06/2023 12:02, Dave (G8PTN)
wrote:
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Hi Paul,
The value depends on the device on the I2C adapter board.
From the manual:
PCF8574AT, EEPROM Addr 0 = 7E
PCF8574T, EEPROM Addr = 4E
73,Dave