Arduino Vader “Force Grip” remote car (a.k.a. smartphone virtual wheel)

The 3-wheel car is built with the Makeblock Robot Starter Kit. (Plus some Legos for style.) It has a Bluetooth module. It is controlled by the phone’s gyros via Bluetooth. You drive it like a steering wheel with two hands, or like Darth Vader with one hand. 1. Code for the smartphone below. I saved […]

Teaser: Makeblock Robot Starter Kit Cellbot + Sensors + shxtty Path Tracking

Well this was fun. Ingredients: Makeblock Bluetooth module To execute instructions from smartphone. LG Optimus Dynamic Strapped on robot for sensors. WiFi to talk with Mission Control. Bluetooth to control robot. Tornado server Runs on PC. Connects to phone via SL4A. Talks with web UI using websockets. Websockets To stream sensor data from phone to […]

How to fix SL4A webCamFacade exception

On some phones, if you try starting the webcam using SL4A, you will get the following exception: java.lang.RuntimeException: setParameters failed Yuck! Thankfully, the fix is simple. I found Paola Garcia‘s solution everywhere I looked on the internet. She was cheerfully answering everyone’s questions all over the place. She said she fixed the problem by changing […]

LG Optimus Dynamic – perfect cellbot phone?

It is the cheapest, full-featured Android phone that I’ve found. Only $20 on Amazon NEW. It feels like finding hidden treasure because the only reason it’s so cheap is that the phone is targeted for the bottom market. And, normal people who buy the phone later add minutes to use it as a phone. But […]