3D Printing

I am having fun by designing 3D models and printing them in different materials such as PLA, ABS and Wood-PLA. I assembled the Do It Yourself Kit "Geeetech Prusa I3 X".
Below some examples of my prints.

Duplo








I designed a copy of the Lego duplo thanks to the great FreeCAD software. I printed it with layers of 0.1mm to have a good accuracy. This part fits really well to the official parts !

Support GPS








I wanted to use my motorbike's GPS in my car but I could not find an appropriate support. I designed it with freeCAD and printed it in ABS material.

Toys








The web offers many 3D Models to download. I printed some of them for my children. For example this little digger with an amazing design: parts are rotating against each other thanks to some small gaps, although it was a single step print. I had to add an extra fan cooling system to avoid that the edges of the print were bending (warping problem).

RC Car

I created a RC car based on an Arduino Board. I used 4 motors triggered by a L293D chip. The car is controlled with a Infrared Remote. The speed is variable thanks to the PWM outputs. Afterwards, I decided to upgrate this car to become a small robot...

Specifications of the RC car:
- Built with an Arduino UNO R3 Board (powered with a dedicated 9V battery).
- I wrote the program in C language (Arduino IDE).
- The cars is 4 wheels powered with 4 motors that I control with one chip L293D. I can control the 2 left wheels and the 2 right wheels indepedently (forward or backward). Therefore the car can move forward, backward or turn on the spot (2 left wheels and the 2 right wheels in opposite direction).
- I used an external power of 6V (4x1.5V) for the motors in order to not discharge the Arduino's battery to quickly and avoid the electrics interferences (pics of tension when the motor stops or change direction due to the inductance of the motor - V=L*di/dt -).
- The car is controlled with an Infrared Remote. I connected an IR sensor to the Arduino Board.
- The speed is variable thanks to the PWM (Pulse Width Modulation) output of the Arduino which adjusts the voltage to change the speed of the motors.

Afterwards, I decided to upgrate this car to become a really basic robot:
- I added an ultrasonic sensor to continously check the distance of the next object in front of the car.
- The car is now able to drive alone and to avoid obstacles: when an object is getting too close in the driving direction, the car will turn on the spot and continue driving.