Dilshan R Jayakody’s Web Log

This is demonstration project to control servo motor movement using physical marker and normal video camera. In this project video camera capture the movements of marker and calculate rotation angle based on that. This calculated rotation angle is feed to the servo through small MCU based interfacing unit. In this project video processing and tracking is performed using ARToolkit and controlling of servo is carried out using PIC16F628A microcontroller. RS232 interface is use to communicate between PC and microcontroller. Interfaces in optical servo controlling system This application detects movement of marker on Z axis (yaw) and transforms it into another numerical scale to manipulate the servo motor. Processing application is written using Visual C++ and configured to work on Windows operating system(s). The marker used for this application is needed to be a " square with some symbol " and user can train this system for any compatible marker. As per our tests, st...

In this project we introduce easy to build, miniature servo controller. This miniature servo controller system is ideal for most of the robotic and mechanical projects. Some of the most notable key features of this project are: Tiny PCB design (35mm × 33mm aprox.) using standard through-hole components. Support for both analog and digital control interfaces. Compatible with most of the servo units. Low cost due to small amount of components. The main controller of this project is PIC12F675 – 8bit CMOS microcontroller. In this given design we configure PIC12F675 microcontroller to operate using its 4MHz internal oscillator. This designed servo controller may successfully work with any generic servos which include MYSTERY, Futaba, HiTec, JR Radio, etc. At the prototyping stages we test this controller with several MYSTERY 3.7g and 9g servos. This servo controller is design to work in 2 operating modes. In first mode this system may work with analog potentio...

After the 2 weeks of continues development we finally design suitable RC remote control system for cars. This RC system has, Battery eliminator circuit (BEC) Control System 433MHz transmitter and receiver module Motor driver and servo controller In this design both transmitter and receiver modules are based on seeed studio’s 433MHz RF link kit and control systems are based on microchip’s PIC16F84A MCU. At the design time we test this circuit with Futaba, Airtronics, JR-Radios, HiTec and "Mystery" (available in eBay) micro-servo units. This circuit may support standard electric motors (brushed DC motors) and during the testing stages we drive RC helicopter motors and RC airplane motors successfully with this system. To drive this circuit we use 7.2V 500mAh Li-Po batter pack. During the circuit assembling and testing, make sure to take necessary actions (e.g: shielding) to prevent/minimize the EM interferences which was generated by the motors. Most of the time t...