Green Screening in Final Cut Pro X

Hey all,

I wanted to make a quick video showing off how to do chroma keying (Green Screening) in the latest Final Cut Pro X for anyone who may be unfamiliar with the new version. Enjoy!


New Android/Arduino App – ipgamepad

Just wanted to post a little update here about the latest project I’ve been working on called ipgamepad. If you’re looking for a video, don’t worry. We’ll be documenting this fully in the next episode.

In a nutshell, ipgamepad is a simple app that runs on any Android device and acts as a virtual gamepad controller that transmits the control data wirelessly. Right now it’s extremely simplistic in nature (just 2 analog sticks), but I have plans to build out a full controller with buttons and switches. My motivation behind building this is for controlling Arduino/Netduino robots over WiFi.

If you’re like me, you probably have a spare wireless router lying around the house and there’s a good chance you’ve got an Android device accessible to you. With those 2 components you’re literally a microcontroller + ethernet interface away from a wireless control system. On the Google Code page, I’ve also provided an Arduino sketch that you can run if you have an Ethernet shield. You can directly control servos or speed controllers from the Arduino, providing a complete robot control system.

If you’re an Android developer and are interested in helping with the project, let me know! I definitely could use the help developing the app and there are a lot of things to improve/implement before I consider the app anywhere near polished.

The video episode will be following soon with a full explanation and robot demo. Enjoy the code until then!

Action Sports Game Timer

Timer for airsoft and paintball games that has multiple game modes (defense/attack/capture). Timer must be “diffused” by a player in defense mode, armed/diffused in attack mode, or 2 teams fight over control in capture (king of the hill) mode.

This is currently a work in progress. More details and code coming soon.

Electric Go Kart

A complete conversion from a gasoline powered go kart into an electric go kart featuring a full control system with feedback.

Pictured here are the four motors powering the vehicle, motorcycle batteries, brake lights, electronic speed controllers, and various other components of the control system.

The dashboard of the vehicle is outfitted with an LCD screen that displays current power being sent to the left and right drives. A potentiometer inserted into the steering shaft allows the system to dynamically alter motor speed based on turning.

Reprogramming the software running onboard the system.

The system uses a modified set of steering wheel/pedals from a racing video game. The system has variable speed control by use of this method.

The electronic bits that make everything actually work.

Mini GPS Autonomous Car for Under $100

First off, if you haven’t watched episode #5 of The Tech Junkies, I’d have to insist you do that now:

Okay, so let’s get onto the details. As seen in the video, we hacked apart a $15 Radioshack R/C car for the purpose of outfitting it with a GPS chip. We ripped out the motor that was being used for steering and replaced it with a low-cost $10 servo. We also cut out the existing electronics so that only the wires coming from the battery and running to the drive motor we’re left. From here we took a breadboard and connected up our H-Bridge drive chip.

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Project: Ethernet Enabled Twitter Client

For my latest project I wanted to build a microcontroller powered device I could hang on my wall (or pin to at the time of writing this). I decided to build a Twitter reader, but not just any old “LCD connected to a PC” setup. No, I wanted this thing to be computer independent.

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