Desk of Ladyada - A Quiver of QT’s

This weekend we cranked through 3.5 QT Py designs (we didnt finish routing one, its a toughie!) - we already make SAMD21, RP2040 and ESP32-S2 and we wanted to add some more chips to the mix: ESP32-S3 (dual core version of the S2), ESP32 Pico (OG ESP with built in flash/psram), ESP32-C3 (Risc-V wifi!) and nRF52840 (BLE wonder-chip from Nordic). the last one is what we didn’t get to finish routing because its a particularly tough one. The other 3 worked out fine with a 4 layer PCB. We also designed a few ’BFF’ boards - that fit onto a QT Py like a shield. Finally, we did get our floppy featherwing and adapter/breakout in, which lets us clean up our floppy wiring - we’ll be able to do more floppy stuff with less mess! The Great Search - Dual NPN in SOT-363 for ESP32 For the ESP32 Pico QT Py we will be including a CP2102N (covered a few weeks ago!) to do USB to serial conversion. We also need a dual NPN transistor to do the funky reset/boot toggle required to reset the ESP