I’m trying to finish up the PCBs for the boat this weekend and thought I’d share this little solution I thought was kind of neat.
Among other things, we need to measure the battery pack current, and fairly accurately This is mainly so the BMS can keep track of the approximate battery state of charge — i.e. percent charge remaining. To do this we need to measure the load current and the charger current all the time, and basically count coulombs in and out. (There are some more sophisticated things you can do by doing calibration, tracking impedance and temperature but I don’t plan on doing any of that craziness for something like this. There are some cool state of charge ICs out there as well, and you actually calibrate them with the cell you’ll be using. Pretty cool.)
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.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Peloton to break ground at a new manufacturing campus in Ohio
Wearables — A costume and a photo op
Electronics — Ew! Sticky!
Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython tops Tom’s Hardware Best RP2040 Boards 2021 and more #Python #Adafruit #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — Toddler Clock, Predictive Weather Station, and more!
Microsoft MakeCode — Arcade Beginner Skillmap
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 06/09/21 feat. #Adafruit #Trinkey #QT2040 – RP2040 USB Key with Stemma QT!
Sorry, the comment form is closed at this time.