![]() To get you going fast, we spun up a custom made PCB in the STEMMA QT form factor, making it easy to interface with. We have 10K pullups on each side, from the I2C pins to the matching VCC for that side. Now send data over I2C and you're good to go. Unlike our other QT boards, the two sides are obviously electrically isolated, which means each half must be powered! Check that the green LED is lit on both sides. Usage is easy - you get power/ground/clock/data breakout pads for each side as well as a matching STEMMA QT connector. The chip we use, the TI ISO1540 is fully bi-directional, supports up to 1 MHz clock rates, supports clock-stretching, works with 3 to 5V DC power or logic (separate on either side of course), with 2500 V-RMS isolation Whatever it is, you can use the Adafruit ISO1540 Bidirectional I2C Isolator to add full electrical isolation between two sides of an I2C bus. Maybe because one is Earth-grounded, maybe because you've got some funky power monitoring setup, maybe you want to reduce noise. ![]() Join us every Wednesday night at 8pm ET for Ask an Engineer!įollow Adafruit on Instagram for top secret new products, behinds the scenes and more ĬircuitPython – The easiest way to program microcontrollers – CircuitPython.Sometimes you'll find yourself with an I2C bus controller on one side, and an I2C bus device on the other and you gotta keep em (electrically) separated. Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there. ![]() Join 35,000+ makers on Adafruit’s Discord channels and be part of the community! A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. If you picked up one of these excellent little breakouts, this guide is a great place to start!Ĭheck out the full guide: Adafruit ISO1540 Bidirectional I2C Isolator! There’s an overview, a pinouts page and download resources for you to learn more about the chip and the breakout. The Adafruit ISO1540 Bidirectional I2C Isolator guide covers everything you need to get started using your ISO1540. ![]() The chip we use, the TI ISO1540 is fully bi-directional, supports up to 1 MHz clock rates, supports clock-stretching, works with 3 to 5V DC power or logic (separate on either side of course), with 2500 V-RMS isolation. ![]() Maybe because one is Earth-grounded, maybe because you’ve got some funky power monitoring setup, maybe you want to reduce noise. Sometimes you’ll find yourself with an I2C bus controller on one side, and an I2C bus device on the other and you gotta keep em (electrically) separated. I2C bus controller on one side, I2C bus device on the other: you gotta keep em separated! ![]()
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