Desk of Ladyada - STEMMA QT RTS & UPDI Time
We're back from a break last week, and jumping into some hardware designs we put together before we took last weekend off. Two RTC QT designs - starring our two favorite RTC chips - the DS3231 and the PCF8523! We also started adding UPDI support to the AVR programmer library we use for computer-less programming. Thankfully we are able to use the open source port of pymcuprog from brandanlane: https://gitlab.com/bradanlane/portaprog and with a little noodling, have got some data going back and forth. The Great Search - Coin Cell Battery Holder + Lead Time Trends…
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