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November 22, 2013
News - The Crystal Anniversary
about 4 months ago
Always look forward to your posts, Feldi. :)
about 11 months ago
To answer my own question, yup: Qwiic Visible Spectral Sensor - AS7262.
Fun pair of 6 channel sensors; sorta sucks they use the same I2C addresses, though, as that makes pairing them a bit more difficult. Switched to a board with multiple I2C buses to work around that, though.
From the checkbox on the back, were there any plans on doing a run using the AS7262 (visible light version)?
News - Enginursday: Extraction o…
about 2 years ago
From experience, a crockpot/slow cooker plus oil bath is near perfect as a heat source for Soxhlet extraction with ethanol. The cheapo thermostat in the cooker is good enough to keep temperature regulation without needing to bother with a whole PID controller setup–I don’t believe crock pots get hot enough to boil water (mine doesn’t anyway) but it easily hits ethanol’s BP.
An aluminum foil tent around the boiling flask helps the system reach equilibrium temp faster, but isn’t strictly necessary.
I typically use vegetable oil in the cooker as the heat transfer medium because it’s cheap and renewable. Downside is that my apartment smells like french fries for days afterward.
about 4 years ago
To answer my own question, in case it helps others, the main differences appear to be:
Hope this helps some people!
Can I replace the FT232R with FT231X/FT230X?
Alternate FT231X breakout board schematics
Some more breakouts for the FT231X
about 4 years ago
What’re the difference between FT232RL and the FT231X breakouts? Obviously mini vs. micro USB connectors are one.
I ask because the description for the FT231X says it’s a drop-in replacement for the FTDI basic cable. However, the Arduinos with USB based on the ATMega328PU (i.e., not the ATMega32U4 with built-in USB comms), like the RedBoard or Adafruit’s USB Boarduino, all seem to use the FT232RL instead.
components needed to build my own version of this:...
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