0

TUTORIAL TUESDAY! Converting an Arduino to 3.3V

Fetch-5

TUTORIAL TUESDAY! Converting an Arduino to 3.3V – All official Arduinos run on 5 volts, which for a long time was the ‘standard’ voltage for hobbyist electronics and microcontrollers. But now the coolest new sensors, displays and chips are 3.3V and are not 5V compatible. For example, XBee radios, and SD cards and acellerometers all run on 3.3V logic and power. If you tried to connect to them with 5V you could damage the internals of the accessory. We use chips like the CD4050 to do level conversion but if you are using a lot of 3.3V devices, maybe you’re just better off upgrading the entire Arduino to run from 3.3V! To do that, we will replace the regulator so that the DC barrel jack for a 3.3v type, and then reconfigure the 5V usb power line so it goes through the regulator as well.

Read more!


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 12,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — What’s next for Indiegogo after leadership shakeup

Wearables — Turn up the volume

Electronics — Code like everyone’s watching

Biohacking — Stroboscopic Visual Training

Python for Microcontrollers — Python on hardware measures up, FEATHER soars, and more! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



7 Comments

  1. Jan D Schuitemaker

    It would have been nice if we could switch between 5 and 3.3V. Anyone has a good tutorial for that?

  2. Do you have to change something in the code?
    Because the datasheet says:
    0 – 10 [email protected] – 5.5.V
    0 – 20 [email protected] – 5.5V
    and 16Mhz is somewhere in between… Will it be stable?

  3. Neat! It would be nice if the standard arduino had this feature

  4. uhe, read the end of the article
    scarf, it is 2.7v

  5. It should be accelerometers (not acellerometers )

  6. scharf, for arduinos (which is what this tutorial is for) it is set to 2.7v

  7. ladyada: presumably that’s not necessarily true for Arduino clones, or Arduinos that have been upgraded from the Atmega168 to Atmega328 post-purchase. Admittedly, it should be if the bootloader was burned correctly, but still…

Sorry, the comment form is closed at this time.