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Conventionally, wireless-controlled  robots use RF circuits,  which have the drawbacks of  limited working range, limited frequency  range and limited control. Use  of a mobile phone for robotic control  can overcome these limitations. It  provides the advantages of robust  control, working range as large as the  coverage area of the service provider, no interference with other controllers and up to twelve controls. Although the appearance and  capabilities of robots vary vastly,  all robots share the features of a mechanical,  movable structure under  some form of control. The control of  robot involves three distinct phases:  perception, processing and action.  Generally, the preceptors are sensors  mounted on the robot, processing is  done by the on-board microcontroller  or processor, and the task (action)  is performed using  motors or with some  other actuators. Proje...

This is the Simple Battery operated emergency light Circuit Diagram. This simple circuit providers battery operated emergency lighting instantaneously upon failure of the regular ac service. When line power is restored, the emergency light turns off and the battery recharges automatically. Simple Battery operated emergency light Circuit Diagram     The circuit is ideal for use in elevator cars, corridors and similar places where loss of light due to power failure would be undesirable. Completely static in operation, the circuit requires no maintenance. With ac power on, capacitor CI charges through rectifier CRI and resistor Rl to develop a negative voltage at the gate of the C106Y SCR . By this means, the SCR is prevented from being triggered, and the emergency light stays off. At the same time, the battery is kept fully charged by rectifier CR2 and resistor R2. Should the ac power fail, CI discharges and the SCR is triggered on by battery power through resistor R3. Th...

Here is the circuit diagram of Remote Operated Home Appliances or Remote controlled Home appliances. Connect this circuit to any of your home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote control. The circuit can be activated from up to 10 meters. It is very easy to build and can be assembled on a vero board or a general-purpose PCB. Circuit Diagram The 38kHz infrared rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground, pin 2 is connected to the power supply through R5 and the output is taken from pin 3. The output signal is amplified by Q1. The amplified signal is fed to clock pin 14 of decade counter IC CD4017 (IC1). Pin 8 of IC1 is grounded, pin 16 is connected to vcc and pin 3 is connected to D2 (Red LED), which glows to indicate that the appliance is ‘off.’ The output of IC1 is taken from its pin 2. D3 connected to pin 2 i...