Category Archives: Sowftare

LiTeRo – The Little Telepresence Robot

Full build write up and videos here: CLICK HERE

LiTeRo, short for Little Telepresence Robot, is a DIY Raspberry Pi powered robot that can be controlled from any web browser from anywhere in the world. We wrote a single Python program in conjunction with a lightweight AJAX-style communication standard to achieve extremely low latencies with relatively few software dependencies.

LiTeRo is as a do-it-yourself project is designed to be exceptionally modular and customizable.  By default, it was designed to sport a wide angle Raspberry Pi camera, High-power IR navigation LED, 9-DOF IMU, 4Ah LiPo battery (with monitoring), and a roll-in charging dock. Also incorporated later in development was a method for verbal communication. That’s right, LiTeRo can speak nearly 50 languages with the eSpeak Text-To-Speech (TTS) engine! Other TTS software packages for the Raspberry Pi can also be implemented with relatively minor revisions to the Python program. The robot can also sport a number of 9g servos for basic environment manipulation or for self-righting maneuvers.

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Using a Trinket to control a stepper motor with acceleration – Dorm automation

After almost four years living in university dorms, I am left aching to hack a place of my own. As expected, I eventually decided to automate my dorm room window blinds.

What came of it was a fanciful bit of ultra-lightweight Arduino code.
Be sure to visit the full write-up page for more details.

At the heart of this CommandStrip-stuck gadget is one original Adafruit Trinket microcontroller sporting a feeble ATTiny85. It sits next to a generic A3988 stepper motor driver.

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Hard Drive Solenoid Engine With Trinket

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Solenoid engines are nothing new, though they still seem to be a fairly common project among the curious. Using a hard drive makes such a project much more simple and straight forward, that is if you want to keep it that way.

This solenoid engine uses a software control loop (code below) running on a 16MHz Adafruit Trinket to adjust its speed. The program specifically alternates between a modest 180RPM to a smashing 3000RPM every five or ten seconds! Watch the video below!

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