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Helpful Scripts for CircuitPython & Real Time Clocks (RTCs) [01594912346]
… and set it as the CircuitPython time source. I tried several detection methods, but settled on…
Calibrating the DS3231 and PCF8523 RTCs [01594923755]
The DS3231 and PCF8523 real time clocks (RTCs) can
both be calibrated by writing various register values. To follow the
calibration procedures you'll need a frequency counter you trust, with at least
6 digits to calibrate the PCF8523 and 7 digits to calibrate the DS3231. (It
also has to operate at the comparatively low frequency of 32.768kHz; a common
inexpensive 8-digit frequency counter such as the "SANJIAN STUDIO" has a
minimum of 100kHz so it's not usable for this purpose) I use an old HP 5315B
universal counter that has been calibrated against GPS time.
Minimal Time-Zone Handling for CircuitPython [01595021837]
… of Daylight Saving Time. However, CircuitPython doesn't build in any distinction between local and UTC time,…
… without last-week support. The "real" CircuitPython RTC has to be set to UTC time for this…
Quad CharliePlex FeatherWing hack [01595078470]
Adafruit makes these neat "CharlieWing" displays that allow you to control a 15x7 LED matrix using the
I2C bus. I2C uses two signal wires (called SDA and SCL, for Serial DAta and
Serial CLock), and can connect multiple devices as long as they have different
addresses.
I noticed that the bigger brother of this device, with a whopping 144 LEDs, could be configured for 4 different I2C addresses, while this one could only be configured for 2.
Or could it?
Si5351 Frequency Planner in Python [01597601150]
… the form used in the CircuitPython adafruit_si5151 library. Sadly, as CircuitPython does not support the fractions…
… run this code on a CircuitPython board directly controlling the si5351 chip. Example: Generate 315M/88 (NTSC…
Pi Zero W USB Proxy [01599489100]
Quick CircuitPython Driver for ES100 WWVB Receiver [01624499029]
… to interact with it in CircuitPython. I'm not super thrilled with how the chip works; I…
… a Feather nRF52840 Expess with CircuitPython 6.3, but it should work on a range of boards.…
Hybrid Keyboard Descriptor supports Boot & NKRO [01626210345]
Updated 2021-09-25: For compatibility with CircuitPython 7.0.0. It has been suggested that it's possible to have…
… earlier experience with how easy CircuitPython 7 made it to try a custom descriptor for NKRO,…
Where should CircuitPython go in 2022? [01641354260]
… the time required to build CircuitPython core with changes to GitHub CI circup and bundlefly greatly…
… of reviewer and contributor JP's CircuitPython Parsec and Scott and FoamyGuy's livestreams are great, but I'm…
Recent keyboard deeds [01662257474]
… conversions recently. They all use CircuitPython. The hardware setup is not documented as none are worthy…