Dilshan R Jayakody’s Web Log

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...

Electric Fences are designed to create an electrical circuit when touched by person (or animal). The circuits proposed in this article release 10kV electrical pulses to the fence-line and monitor the line status. This entire system is design to drive using 25V (5A) single-rail DC power source (using 5A power supply unit or pair of 12.6V Lead-Acid batteries). Main controller of this system is Microchip PIC12F675 – 8bit microcontroller. All the line monitoring, pulse generation and alarm system controlling is performed by this microcontroller. Some of the most notable features of this system are built-in audible alarm system, contactless fence line monitoring system, Support for wide range of step-up transformers (up to maximum of 10kV) and compact 10cm × 10cm PCB design. This system use standard electronic components (through-hole components) and SMD components in this provided PCB layout. All the project documents, schematics, PCB designs and firmware source codes are available...

In this project we developed user programmable automatic night light using Microchip's 8bit MCU – PIC12F675. In this design user may be able to program and store the time duration of the master light. Compared with other designs this circuit use transformerless power supply, and TRIAC to control the master light. Complete MCU software source code, operating guides and circuit diagram of this project is available to download at here . To get more information about transformerless power supply please refer the Microchip application note AN954 , and ST application note AN438 for MCU and TRIAC interfacing.