Desk of Ladyada – HV UPDI and I2C WDT #DeskOfLadyada #Adafruit @Adafruit « Adafruit Industries – Makers, hackers, artists, designers and engineers!


This week we worked on a few pending designs to wrap them up. First is the HV UPDI programmer. Remember a few weeks ago we talked about two versions of our UPDI programmer, one with a 12V booster to provide a high voltage pulse, and one without. The one without was easy to get finished so it’s stocked now. So next we’re verifying the high voltage one is good – that requires editing the boards.txt file to permit using the UPDI pin as reset.

Next we revisited our S-35710 breakout. We were hoping to be able to use this as a low-power sleep chip that could disable an low drop out (LDO) enable pin for ultra low power on chips that don’t have deep sleep. However, we weren’t able to get it working as we initially desired. It’s still good as a watchdog timer (WDT) chip though!

Also catch The Great Search – this week: The classic LM7805 TO-220 5V regulator.

Catch Desk of Ladyada live on YouTube every week Sunday evenings and past episodes on YouTube.

See the video below:

 

 

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