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The Prowler
This Project was submitted to Parallax by Daniel Woolston
The prowler is a modified Parallax BoeBot kit. It has a Carnegie Mellon CMUCAM mounted on the front of the robot for color tracking and motion sensing. The missile launching system that is mounted on the top was ripped from a Motorworks Missile Launcher platform. The tread kit is also from Parallax and gives the bot a little more front-to-back stability, especially in firing mode when the recoil from the missile assembly tends to shift the bots position.
The basic function of the robot is to seek out the color red and if the target is in motion then track and follow it. If the target remains still for 3 seconds and missile count is larger than zero, a rocket is launched. The robot is accurate to within 6-10 inches at a range of 3-5 feet.
Parts:
Parallax BoeBot kit
Parallax Tread Kit
CMUCAM
Missile Assembly: (search for Motorworks Missile Launcher for retail)
 Notes on Assembly:
If you’re going to build one of these (and I encourage you to do so) you’ll want to be especially careful on the polarity of the trigger motor. The assembly is a one way spin and any attempt to apply negative polarity will lock up the missile launcher and consequently fry your motor. The assembly runs off of a 9.6V 700 mah battery pack (which you’ll rip out of the toy). I opted for a 5V relay setup on an I/O port to trigger the launchers voltage (and consequently firing) You’ll want to open the port with your Hi/Low call and pause for at a second between rounds to avoid overheating the firing motor.
Check my website for more details and a small video showing the firing sequence. |
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