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3.3V, like the Due, that's unfortunate. This means it won't be compatible with most of the Uno shields, or 90% of the sensors on the market. Kinda wish Arduino
by ceequof 12y ago
3.3V, like the Due, that's unfortunate. This means it won't be compatible with most of the Uno shields, or 90% of the sensors on the market.
Kinda wish Arduino had gone with something with wireless stuff built in, like the Linkit One or RFduino.
- mpitt 12y agoThere's the Arduino Yun with WiFi http://arduino.cc/en/Main/ArduinoBoardYun http://arduino.cc/en/Main/ArduinoBoardYun
- danellis 12y ago> This means it won't be compatible with ... 90% of the sensors on the market Are you sure about that? 3.3v is extremely common in the industry, to the extent that a lot of hobbyist 5v stuff has to be level shifted.
- tdicola 12y agoI think in later Uno revisions they added a IOREF pin for shields to read what voltage the IO is at and could in theory adapt to 5V or 3.3V as necessary. But yeah it's still a pain in the butt for older shields that assume they're at 5V. Lots of sensors are happy at 3.3V though and many breakout boards are built to accept both 3.3V & 5V (with a level converter to take 5V down to 3.3V).
- swamp40 12y ago5V is dead, and has been for years. Even 3.3V is dying. These are among the lowest power chips in the world, regular bleeding edge stuff. Higher voltage means higher power, so there is a race to get as low as possible. Internally, the D21 core runs at 1.2V. (There's an internal regulator that needs at least 1.62V coming in.) But anything above that is just a waste of energy (besides the fact that the highest clock speeds need 2.7V minimum for 0 or 1 wait states). They allow it, for compatibility, but you can see why even 3.3V is dying. The shields will be happily redesigned.