2B-FAN SPEED CONTROLLER (BY CLAP)
You can control the speed of your fan by a CLAP as well as put it OFF or ON. This project serves as a remote switch and particularly more useful during night as you can control the speed without going out of bed.
TECHNICAL DESCRIPTION AND WORKING
This project has been develped and successfully tested O.K at TV Engineers Technical Lab.
The manual fan speed controller available in the market causes many inconvenience as it is very easy to operate and Dishers when you buzy in your work as you have to move. Keeping these facts in view the present project is developed by which you can convert your manual to speed controller into a clap operated remote controller. In this project the IC 555 and CD 4017 have been employed. When we clamp,the condenser mic converts the sound energy into electrical energy. The elecrical energy is then amplified by the transistor BC 148. The amplified signal is than fed to the pin No 2 of IC 555 and the positive pulse is available at its pin No3. The positive pulse is fed to pin No14 (input pin) of IC 4017. When the IC 4017 receives the first pulse its output is released through pin No 2 and amplified by transistor BC 148.
The amplified signal is applied to the relay and the fan starts in low speed. When the sound pulse is received by pin 4 and the Relay-2 operates resluting an increase in the speed. Finally when the pulse reaches pin No 10, fan comes to full speed. When we clap again the IC Re sets and the fan becomes OFF. This order continues. The interesting feature of this project is that when the power is resumed again after a failure, the Fan comes to OFF position automatically as long as the speed is not controlled by a clap. Connect the relay of all the output to the resistors of manual regulator.
PRECATIONS WHILE ASSEMBLING
1.Check all the components whether they are as per the circuit before assembling.
2.Use IC Base for mounting IC
3.Avoid short circuit while soldering.
4.Be careful about the polarity of the transistors while a soldering
LIST OF COMPONENTS