Adafruit 757 Logic Level Converter I2C Safe Bi Directional 4 Channel

Adafruit-757-Logic-Level-Converter-I2C-Safe-Bi-Directional-4-channel-Adafruit-757-P-The-Adafruit-I2C-safe-Logic-Level-Converter-lets-your-5V-Arduino-or-other-microcontroller-talk-to-3-3V-sensors-displays-and-flash-cards-over-I2C-Ordinary-level-shifters-won-t-work-with-I2C-but-this-bi-directional-shifter-from-Adafruit-is-specifically-designed-to-do-just-that-It-uses-4-x-BSS138-FETs-with-10k-Omega-pull-up-resistors-allowing-10V-on-one-side-and-as-low-as-1-8V-on-the-other-Plus-it-also-wo

Price: £ 5.17 from Rapid Online Rapid Electronics Ltd.