A USB power delivery stand-alone sink controller @oxplot
The Oxblog posts about finding a nifty chip to handle power draw from a USB C port.
Chips like the popular FUSB302 which only provide the wire level handling of the USB-PD protocol, require a lot of software work to make them reliably operational. And that software will need to run on a µC which adds to BOM. So I went to search and found a gem called STUSB4500 from STMicroelectronics. In short, you program some registers to chip’s NVM via I2C once which define what voltage range/current you require and the chip will negotiate those requirements with a charger connected to it.
He set out to design a minimal but practical board that could be used with a laptop (Lenovo ThinkPad X250), further generalizing it to fit almost any purpose.
I think STUSB4500 sits nicely between modules out there that require complete software stack and those that can set the voltage with a jumper. You still have fine grained control over how much voltage/current you ask for from the upstream power supply, without the hassle of adding extra controllers with software that may not be robust.
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 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.