How to Use the HC-SR04 Ultrasonic Sensor 

A logic level shifter is a great tool to have in your arsenal as a maker. They are fantastic at helping to bridge the gap between 3.3v logic devices (such as Raspberry Pi's and some sensors) and 5v logic devices such as Arduino Uno's. In this post I'll explain the TXS0108E shifter by Texas Instruments. It's cheap enough to have several to hand for when you need it next. To follow along with the example project in the video you will need a few items, the links automatically redirect you to right item on your local Amazon site: TXS0108E Logic Level Shifter: https://geni.us/TXS0108E-Shifter Raspberry Pi: https://geni.us/RaspberryPiV4 Arduino Uno: https://geni.us/ArduinoUno Jumper wires: https://geni.us/JumperWires Breadboard: https://geni.us/MiniBreadboard

A brief overview of the TCRT5000 Reflective infrared sensor.