I took out one of mine (PCF8574 board on old LCD) and measured, 4.7Kohm, so the two SMD 472 resistors marked as R8 R9 are the pullups. Depending on what pullups the EEPROM board has, I think a shared I2C bus will probably still work.
Statistics: Posted by katak255 — Mon Aug 25, 2025 3:28 pm