Rongge

Description  This is a simple type remote control by using RF communication without microcontroller. In this project a remote has been designed for various home appliances like television, fan, lights, etc. It gives lot of comfort to the user since we can operate it by staying at one place. We can control any of the appliances by using this remote within the range of 400 foots. In this project consist of two sections, transmitter (remote) and receiver section. Whenever we are pressing any key in the remote it generates the corresponding RF signals, and these signals are received by the receiver unit. ASK transmitter and receiver is used as transmitter and receiver. HT12E, HT12D encoders and decoders are used in this electronic circuit. The block digram of the whole circuit is given below.  Appliance Control Block Diagram Remote Section In remote section consist of an encoder (HT 12E) and a ASK transmitter. The encoder generates 8 bit address and 4bit data. We can set the addre...

This circuit alarms you whenever their is a power failure in your mains supply and the circuit doesn't use any additional Voltage Source. It is simple to design and effective to construct. Power failure alarm circuit monitor your supply line and trigger the buzzer to produce beep sound when their is a Voltage drop. This circuit finds applications in Refrigerators, Fish Tank, air conditioner etc... All the components used in this circuit is cheap to buy and easily Available in the market. CIRCUIT DIAGRAM FOR SIMPLE POWER FAILURE ALARM COMPONENTS AND THEIR SPECIFICATION FOR POWER SUPPLY FAILURE ALARM CIRCUIT WORKING OF SIMPLE POWER FAILURE ALARM CIRCUIT The circuit mainly consisting of a stepdown Transformer, a bridge rectifier, an PNP transistor and a buzzer. The stepdown Transformer step-down the high Voltage AC to a safer value for the circuit to work fine. And this low Voltage alternating Current is now fed to a Bridge rectifier to make it unidirectional. The diode D2 and Capacit...