Controlling your car over WiFi is good, but mounting a webcam on it so you can actually see where you’re going is even better. [Michael] goes over how he made his wifi car with some great videos in the post about it.
The car used is a seemingly standard RC unit, which came with a speed controller that was recycled for network use. [Michael] removed the standard radio, but having this controller available kept him from having to engineer an H-bridge circuit. The radio was then replaced with a WiFi module from Sparkfun.
There were a few problems with the IP camera to begin with, as the lag was originally unbearable. After some tricks that would qualify as a good hack in itself, the camera was eventually able to perform on an acceptable level and output data to the FLTK app he used to control everything. Check out one of his videos below of this car in action. Continue reading “A WiFi Controlled RC Car With An IP Camera”
Head to head video game action can’t even compare to this use of a coin-op Sega Rally game to race actual RC vehicles. Take a close look at those screens and you’ll see there are no computer graphics, just a feed for a camera on each of the toy cars.
The project was conceived for the Sapo Codebits VI conference in Portugal. The arcade cabinets had their controls connected to an Arduino, but getting video up and running wasn’t nearly as easy. After fruitless attempts to get the original CRTs to work the team ended up replacing them with functioning CRT units of the same size. The cars themselves have two camera, one on top of the vehicle’s cab and one mounted on a boom for a perspective that was above and behind the vehicle. The drivers can switch between either view. The cars were set loose in the room serving as the event’s retro gaming area and players were free to race each other wherever they pleased. Don’t miss the video clip after the break which shows off all of the fun. Continue reading “Coin-op Sega Rally Used To Race RC Cars”
Inspired by the many autonomous rovers such as Curiosity and the self-driving Google car, [Rohit] decided to build his own by taking an off-the-shelf remote control car and adding his own electronics. Unfortunately, he couldn’t find the datasheet for the chip used to receive radio signals and drive the motors, so he ended up building his own electronics and putting them in the car.
[Rohit]’s car – the Thunder Rumbler RC Car – is driven by applying power to two motors. This is an easy system to control, as only two channels are needed to make the car go forward, left, right, or backwards. To drive these two motors, [Rohit] found an SN754410 quadruple half-H bridge driver chip lying in his box of assorted electronic components. Thanks to a helpful instructable, this chip was easily controlled with an Arduino.
That left the problem of sending a wireless signal to the Arduino. [Rohit] accomplished this by relying on an Android phone to provide the remote control.
[Rohit] whipped up a small program running on his desktop that allows him to send ‘L’, ‘R’, ‘U’, or ‘D’ to the Android phone to dictate if the car should go left, right, forward, or reverse. The Android phone receives these commands via the Internet and sends an audio signal through the headphone port. This audio signal is connected to two analog pins of the Arduino. With a little bit of software and a bit of reading up on frequency shift keying, [Rohit] was able to make his car move in any direction.
Even though [Rohit] realized his goal of controlling a remote control car on his own terms, the build is far from done. He plans on adding some ultrasonic sensors and using the Android’s camera for object detection.
[Jon] wrote in to tell us about his programmable RC car, and the Howto guide that he’s made. According to him, this project can be constructed with $9 worth of parts plus an Arduino and a small toy car. So around $50 if you’re starting from scratch.
At it’s core, this project is about using the Arduino to allow your computer to send signals to the toy car. For this, [Jon] has included JAVA code that should be able to run on Mac, Linux, and PC operating systems. The Arduino code is also included.
Most small RC cars like those used in this project switch on at full speed or turn off, but this project allows the PC/Arduino to give the car PWM signals to control the speed. As pointed out in the video after the break, this can be a bit jerky at slow speed, but still a neat effect. A decent amount of soldering is required to get this project working, but it may be a good project especially if you have some of the parts already available! Continue reading “How To Control Your Cheap RC Car With A Computer”
Every once in awhile a project comes along that makes us say, “this is why we want a 3D printer!”
[Skimbal] is pretty well known in 3D printing circles for the incredibly detailed designs he has put out in the past. This time around, his focus is on motoring, Mario Kart style.
His Turtle Shell Racers are ripped right out of the Mario Kart series of games, and are built in the form of the multi-colored turtle shells with which most of us have a love/hate relationship. Constructed atop cheap RC trucks, the Shell Racers require 20-some odd printed parts apiece, but looking at the final results we think the time and money spent would be well worth it.
After watching the videos below, we think you’ll agree that these things look like a blast to play with. The Shell Racers were actually so impressive that they managed to land [Skimbal] a permanent gig with MakerBot Industries.
If you want to try making a set of your own, there are extensively detailed build instructions and all the STL files you can shake a stick at over at Thingiverse.
Continue reading “3D Printed Turtle Shell Racers Bring Mario Kart To Life”
This autonomous remote control-style car from Cornell students was designed for a senior level engineering course there. It’s main “sensor” is a low-res webcam style camera. As shown in the video after the break, this car does quite well staying within two black lines on a white surface using it’s vision processing. It also has an IR sensor to detect objects in front of the car and stop without crashing.
All “vision” computations are handled by an Atmel Mega644 MCU, an 8-bit processor. Because of the processing limits of this chip, much work had to be done to make this process computationally efficient. These students go through an incredibly detailed account of their project, focusing on the code and electrical design. Check out the video of their car in action after the break. Continue reading “An Autonomous Car Using A “Webcam””
Hackaday reader [Danukeru] sent us a video featuring a box-based robot with an interesting personality. The box is fairly simple and from the outside seems to consist only of a switch and an LED. When the switch is flipped however, the box comes to life.
When the box is activated, the lid opens, and a small arm reaches out to turn the switch off. We’ve seen that plenty of times, but this one turns out to be a little different. In the video, this process seems to repeat a couple dozen times before the robot gets angry and flips out. At first we thought that the end portion of the video was done with a bit of digital trickery, but after reviewing the creator’s blog, it looks like it could be legit. It is very hard to see the box’s innards in the video, but it does house a remote control car chassis that allows it to move around and spin out, as seen below.
It’s a pretty neat project, and if you can handle reading the creator’s site via Google translate, there is plenty of picture documentation of the build process for your perusal.
Continue reading “Don’t Hit That Switch!”