This clap-operated remote control fan circuit is utilized to regulate not only the switching features of the fan, but also the speed of the fan. The fact that a clap- operated remote control for a fan may control up to ten-step speeds of the fan is the primary benefit of using such a control. Typically, a fan has between three and five step speeds. This entire clap-operated remote control for fan circuit is broken up into four key sections, which are designated as the sound-operated trigger pulse generator, the clock pulse generator, the clock pulse counter, and the load operator respectively. Sound- operated trigger pulse: – The class-C amplifier mode that the transistor T1 BC148 is

set up to operate in is the primary focus of this section. The voice signal is converted into the electrical signal that corresponds to it by the MIC1, and this electrical signal is then supplied to the base of the transistor T1 in order to amplify and boost the signal's intensity. A pulse generator for the clock: This portion is constructed around the timer IC NE555 and is set up to function as a monostable multivibrator. The trigger pulse that is produced by transistor T1 is supplied to pin 2 of integrated circuit IC1, and the time period (T) for when the output is high is determined using a formula. T = 1.1RC Pulse counter for the clock: This section revolves around the decade counter CD4017BC, which counts the clock pulse that is produced by the timer IC (IC1). The output of IC1 is connected to pin 14 of IC2, which in turn receives it. IC2 has ten outputs, which are labeled o, 1, 2, 3, 4, 9, respectively. Only three of the pin's outputs —numbered 1 through 3—are utilized in this application. 2, 4, and 7 in descending order. Pin 10's output, number 4, is connected in a straight line to pin 15's reset. This section is built around three transistors, which serve as relay drivers, so that it can operate three separate relays. As shown in the circuit diagram, the output from each pin of IC2 is given to the base of each transistor through a resistance of 100 and an LED. The transistor's collector serves as the source of the output, which is then connected to the relay. The three LEDs that are used to indicate gear or speed are labeled as follows: LED1, LED2, and LED3 respectively indicate gear 1, gear 2, and gear 3. NOTE:- This circuit used to operate in 1st speed similarly, 2nd clap for 2nd speed, 3rd clap for 3rd speed, and 4th clap to switch off the fan. NOTE:-This circuit used to operate in 2nd speed similarly, 2nd clap for 2nd speed, 3rd clap for 3rd speed, and

Resistors (all of which are 14 watt, less than 5% carbon). R1 = 10 KΩ; R2 = 1.2 MΩ; R3 = 2.2 KΩ; R4 = 150 KΩ; R5 = 220 KΩ; R6 = 10 KΩ; R7, R8, R9 = 100 Ω Capacitors C1, C2 = 0.1 µF/16V; C3 = 4.7 µF/16V; C4 = 0.01 µF (ceramic disc); C5 = 1000 µF/12V Semiconductors

IC1 is a NE555, which is a decade counter. IC2 is a CD4017BE, which is a timer IC. T1 is BC148, T2, T3, and T4 are all BC148. BEL187; D1, D2 = 1N4001 silicon diode Miscellaneous MIC1 is a condenser microphone with 34LOD, LED1 is green, LED2 is yellow, and LED3 is red, and the secondary transformer for 6V-0V-6V has 500mA.