We love ballistic trajectories and the smell of black powder in the morning, so we’re really interested in the wireless rocket launch pad sent in by [Brent Strysko].

[Brent] used an ATmega with an enc28j60 ethernet shield and wireless router to launch the rocket without a physical connection with ‘the button.’ Everything on the launchpad is powered by a 12 Volt motorcycle battery, and there’s also a flashing LED for the countdown. All that’s needed to launch a rocket is to send a command from the laptop. We think this would be an awesome project when combined with the radio telemetry build we covered earlier – the computer is already there with the range safety officer.

Although amateur rocketry is extremely safe, with no high-power flight ever hitting a person (PDF warning), there’s still some risk of from black powder engines CATOing. We think [Brent] came up with a great way to make a safe hobby even safer, and managed an interesting project in the process. Check out the walkthrough of the launchpad after the break, or check out this video of the launchpad in action.

[Josef Jahn] has posted a detailed guide on building a microcontroller-based launch box. Constructed from an Atmel ATMega168 and powered by a 12V rechargable lead gel battery, the launch box is fully portable and includes a number of safety features. Going the extra mile on what could essentially be a simple push button launcher, he added three safety switches, a sixty second after-launch timer and a beautiful (not to mention rare) PLED display complete with dramatic status messages. Check out a video of the launcher in action after the break.