SMS Remote controller circuit

SMS Remote controller is a device used to control a device remotely using SMS through GSM mobile phones. Process control equipment with a series of AVR ATTiny To SMS Remote Controller can be used to control life and death of these equipment will provide information on the status of replies to our phone in return successful command execution. 

Equipment can be controlled by a series of AVR ATTiny To SMS Remote Controller include lights, water pumps, garage doors, gates and much more. AVR series ATTiny To SMS Remote controller uses the module-47 Sony ericson GM as recipient and sender of the SMS module. Then to the SMS data processor on a series of AVR ATTiny To SMS Remote controller is using AVR microcontroller ATTiny 2313.

Series AVR ATTiny To SMS Remote Controller

SMS Remote controller circuit Click to view larger. 

AVR circuit this part ATTiny To SMS Remote Controller

AVR series ATTiny To SMS Remote controller uses the AVR attiny2313 with 4MHz clock frequency, GSM Module GM trnceiver 47 Sony ericson, SIM Card, 4 relays and an IC regulator. ATTiny AVR microcontroller 2313 can work well on the voltage 2.7 VDC - 5.5 VDC for working with the frequency at 10MHz bahwah. 

The set of AVR ATTiny In SMS Remote Controller To make use of this power supply from the batteries 3.3 VDC. Connection using a SIM Card SIM Card Holder which is connected to the module GM-47, AVR series ATTiny To SMS Remote Controller works with communication between AVR ATTiny and GM-47 module at 9600bps. In a series of AVR ATTiny To SMS Remote controller is equipped with LED D6 as an indicator of the data interconnect GM-47 module with cellular operators where this LED will light continuously when not apat network and will be lit by flashes when a signal from the operator.

Specifications AVR series ATTiny To SMS Remote Controller

• 4 Relay for ON / OFF electronic devices
• 8 input lines for reading in a normal switching
• LED indicators signal operator
• SMS command with password, so only the owner can operate

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Remote Mains Switch Low Voltage Diagram Circuit

This circuit allows a 240V mains appliance to be controlled remotely via low-voltage cabling and a pushbutton switch. The mains appliance (in this case, a light bulb) is switched with a suitably-rated relay. All of the electronics is housed in an ABS box located in proximity to the appliance. The pushbutton switch and plugpack are located remotely and can be wired up with 3-core alarm cable or similar. Cable lengths of 20m or more are feasible with this arrangement. When the switch (S1) is pressed, the input (pin 8) of IC1c is briefly pulled low via the 10mF capacitor, which is initially discharged.

Circuit diagram:

Low-Voltage Remote Mains Switch Circuit Diagram

The output (pin 10) immediately goes high and this is inverted and fed back to the second input (pin 9) via another gate in the quad NAND package (IC1d). In conjunction with the 1MW resistor and 470nF capacitor, IC1d eliminates the effects of contact "bounce" by ensuring that IC1c’s output remains high for a predetermined period. The output from IC1c drives the clock input of a 4013 D-type flip-flop (IC2). The flipflop is wired for a "toggle" function by virtue of the Q-bar connection back to the D input. A 2.2MW resistor and 100nF capacitor improve circuit noise immunity. Each time the switch is pressed, the flipflop output (pin 13) toggles, switching the transistor (Q1) and relay on or off. Note that all mains wiring must be properly installed and completely insulated so that there is no possibility of it contacting the low-voltage side of the circuit.

Author: Bob Hammond - Copyright: Silicon Chip Elecronics

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