Smiley : A solar powered robot

Posted on 19 Nov 2008

Smiley : A solar powered robot
Smiley is a solar powered robot.It draws power from the little solar panel on top. The motors are clocks that modified to run considerably faster than normal. The wheels are of a type found on model aircraft landing gears.This robot can feels his way around with 0.3 mm steel wires, bent to form quarter circles.[more]

Posted in : robot projects

Micro-step driver

Posted on 13 Nov 2008

Micro-step driver
Here is a Micro-step driver for bipolar step motor.It allows to connect a bipolar step motor to a personal computer through the parallel port. The circuit is, for safety reasons, optically isolated from the PC and it allows to manage motors up to 3A for phase. Moreover the digital interface allows to connect up to six motors to a single PC parallel port.[more]

Posted in : motor controller

RS485 communication system using PIC18F4520

Posted on 12 Nov 2008

RS485 communication system using PIC18F4520
This project is a RS-485 based bidirectional communications system using PIC18F4520 to communicate between several nodes. The project will consist of two separate circuits (per node) a) an RS-232 to 2-wire RS-485 converter and b) a 2-wire RS-485 peripheral transceiver.The converter will allow a PC serial port to be converted to and from electrical signal levels required for 2-wire RS-485 format. The RS-485 interface allows up to 32 standard load nodes on a shared data bus.[more]


Posted in : Communication related | PIC projects | RS232 related

PWM Motor Driver with H-Bridge

Posted on 09 Nov 2008

PWM Motor Driver with H-Bridge
This pulse wide modulated driver is designed for DC Motors with a maximal power consumption of 200 watts. It works with a so called H -Bridge. It has three input pins, two for the direction and one for the pwm-signal. The inputs are designed for logic level signals ecpecially for microcontroller outputs.[more]

Posted in : motor controller

RFID sniffer

Posted on 09 Nov 2008

RFID sniffer
Here is the RFID sniffer.It is used to  find out if objects are tagged.The RFID sniffer is a simple analog electronic circuit which can detect the presence of 13.56 MHz RFID tags. These tags are commonly used in all kinds of plastic cards like access badges, bank cards, library cards, loyalty cards and so on. Also many other objects may carry RFID tags without you knowing it. Books, toys, and even clothing might be tagged. Carrying tagged objects with you can reveal your identity or whereabouts to anyone equipped with the appropiate tools to read RFID tags.[more]

Posted in : RF projects

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