More than one year after I shared my I²C logic level converter for the Robotics TXT, the lastest issue 2016-4 of ft-pedia presents on page 73 a similar circuit.

Unfortunately, it doesn't  match with the Level shifting techniques in I2C-bus design application note from NXP. 

This is not the first time ft-pedia introduces dangerous circuits.

Issue 2015-4 of ft-pedia suggested on page 44 that pin 9 of the Robotics TXT extension port provided +3.3V power supply. Pin 9 actually corresponds to RX and is used for debugging.

​Let's hope no Robotics TXT has been damaged.

After the successful smartWiFi and smartBLE leveraging Blynk, smartNode provides the same features and ease of use, but can run virtually anywhere thanks to Node-RED.

Node-RED offers a flexible environment to acquire and process data, design and display a dashboard, and send commands. 

Read the full story.