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An Adafruit Raspberry Pi extravaganza

The folks at Adafruit are busy as a bee working on bringing some of their really cool boards to the Raspberry Pi platform. Here’s a few that came in over the last few days:

16 servos is almost too many

Servos require a PWM output but the Raspi only has hardware support for PWM on a single GPIO pin; certainly not enough to build a gigantic, city-leveling robot. [Kevin] over at Adafruit put together a tutorial for using this 16 channel servo driver with the Raspi.

12 bit DAC

With only one PWM pin and no analog out, it was only a matter of time before someone hooked up the Adafruit 12 bit DAC to the Raspberry Pi.

16×2 LCD displays

Both the servo and DAC builds use the Adafruit I2C library and a bit of Python. Of course it’s possible to treat the GPIO pins on the Raspberry Pi as digital outs, just as [Mikey] did with his Raspi LCD display tutorial.

So, what distro are you using?

Of course all these builds use Adafruit’s Occidentalis distro, a maker-friendly Linux distro we’ve posted about before. It’s too useful to languish as a single Hackaday post, so here it is again.


  1. biqut2 says:

    I’m waiting to see the rpi running LinuxCNC and interfaced to something like the G540.

  2. wardmundy says:

    The real beauty of the Raspberry Pi is you don’t even need any extra hardware to do all sorts of cool things. We already have a full-featured Asterisk PBX running on the RPi complete with Google Voice for free calling throughout the U.S. and Canada as well as free worldwide calling through iNum access points. http://nerd.bz/QTtlIB

    You can take it for a spin by calling 1-843-284-6844.

    With a little luck, we’ll have the complete writeup on Nerd Vittles later next week.

  3. kade says:

    why not just get an I2C LCD?

    • Mikey says:

      The 4/8 bit “Hitatchi” LCDs are fairly standard. Any random LCD you see on a website that’s serial or I2C is *usually* just one of these LCDs with a $20 “backpack” circuit on it, that just contains an AVR or a PIC and converting the digital to serial, etc…

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