Are you a maker in the midst of a STEMMA dilemma? This 100mm long cable is a fantastic chimera-cable fitted with STEMMA QT 4-pin JST SH on one end, and Arduino MKR 5-pin JST SH connectors on the other, with the wires spun around so you can use it to connect STEMMA QT sensors we’ve got to any of the popular Arduino MKR boards!
JST SH (also known as Qwiic) connectors have 1mm pitch. This cable can be used with STEMMA QT boards to easily connect sensors and drivers from one board to the other.
Please note: this cable will plug into either Adafruit STEMMA QT or SparkFun Qwiic boards but the power pin is 5V and Qwiic boards expect 3V, which could cause damage! Don’t use this cable with SparkFun Qwiic boards unless you are positive they are 5V-safe!
Our Stemma QT boards have 10K pullups on the I2C port to the 5V Vin pin, while technically out-of-spec for the SAMD21 series chips, we used this cable without issue on a SAMD21 MKR board. We recommend adding 2 external 2K resistors from SDA/SCL to 3.3V to bring down the voltage of the 10K pullups.
The colors are:
Black for GND
Red for V+ This is connected to 5V on the MKR boards, not 3.3V!
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. 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 code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. 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. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!
Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: CircuitPython Comes to the ESP32-P4, Emulating Arm on RISC-V, and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
