EPISODE · Dec 20, 2021 · 24 MIN
Desk of Ladyada - Post-Family Visit Desk Check!
from Adafruit Industries · host Adafruit Industries
We're back from visiting family, but we do have some goodies on our desk to show off. One is our ESP32-S2 TFT Feather did get wrapped, we wanted to make sure our low power mode is right - we made a mistake with the pullups on the earlier version. We also have a new Feather we finished designing with the code name SCORPIO! The Great Search - 74AHCT245 Small 3V to 5V logic level shifter https://www.digikey.com/short/85jj2p04 For the SCORPIO Feather, we need to buffer 8 outputs for NeoPixels from a 3V signal to a 5V signal. the '245 is the transceiver we have traditionally used - but we need a very smol chip, that can also handle if the logic level is 3V and the power supply maybe gets towards 5.5V, thus getting dangerously close to 1/2 VCC. We'll show why the T is important! #deskofladyada #thegreatsearch #adafruit Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------
What this episode covers
We're back from visiting family, but we do have some goodies on our desk to show off. One is our ESP32-S2 TFT Feather did get wrapped, we wanted to make sure our low power mode is right - we made a mistake with the pullups on the earlier version. We also have a new Feather we finished designing with the code name SCORPIO! The Great Search - 74AHCT245 Small 3V to 5V logic level shifter https://www.digikey.com/short/85jj2p04 For the SCORPIO Feather, we need to buffer 8 outputs for NeoPixels from a 3V signal to a 5V signal. the '245 is the transceiver we have traditionally used - but we need a very smol chip, that can also handle if the logic level is 3V and the power supply maybe gets towards 5.5V, thus getting dangerously close to 1/2 VCC. We'll show why the T is important! #deskofladyada #thegreatsearch #adafruit Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------
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Desk of Ladyada - Post-Family Visit Desk Check!
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