Audio Output Switcher
I built a manual switch-box to easily click between speakers and headphones.
Contest: R/C Sumo Wrestling – Feb 25
I’m pleased to announce that Omaha Maker Group will be hosting another contest: Radio-Controlled Car Sumo Wrestling! Knock your opponent’s car to the ground and be the last driver standing! Rules are as follows: You may enter any toy-grade radio-controlled car with a fair market value of $20 or less. Be prepared to show receipts …
B³: Banker’s Box Benches
It’s been two years since we first decided to start using banker’s boxes for storage at OMG. The idea has worked out great, and that original storage shelf is still going strong and sees constant use, but we filled it almost immediately. We had originally planned on making several of those shelving units, but they’re …
Battery Derating and Chemistry Comparison
This weekend, Dave K was asking me some questions about the performance of our sweet LiFePO4 battery packs for the power wheels cars. At the time I was only able to answer his questions in generalizations, so I decided to sit down and show exactly how our lithium compares to more conventional lead-acid. We’re running …
Power Wheels Racing Progress
Progress on the new Power Wheels racing car (Code Name STEVE) continues at a good pace! We’ve completed our innovative wood torsion box frame and are starting to lay out the other components for mounting. Here’s the recap: The overall dimensions of the cart are 4′ in length (to make good use of our raw …
Trebuchet Contest Results
Thanks to all who took part in our Trebuchet Contest! We had perfect weather and all involved had a great time. With nine people competing on six teams, we saw a wide variety of designs and lots of experimentation. Each team fired three shots, which were analyzed for efficiency and for accuracy. The efficiency score …