abstract for wireless switch using ic ca3140

plz send me the abstract for wireless switch in efy magazine using op amp and phototransistor?
Normally, appliances are controlled by switches, sensors, etc. However, physical contact with the switches can be dangerous if there is a short circuit. The circuit described here does not require physical contact for the operation of the apparatus. Simply move your hand between the infrared LED (IR LED1) and the phototransistor (T1). The infrared rays transmitted by IR LED1 are detected by the phototransistor to activate the hidden lock, the discharge system, the hand dryer or else. This circuit is very stable and sensitive compared to other CA home appliance control circuits. It's simple, compact and cheap. Current consumption is low in milliamps.

The circuit is built around a CA3140 IC, IRLED1, phototransistor and other discrete components. When 5V is connected to the circuit, the IR LED1 emits infrared rays, which are received by the phototransistor T1 if it is correctly aligned. The collector T1 is connected to the non-inverting pin 3 of IC1. The reversal of the pin 2 of IC1 is connected to the voltage divider preset VR1. Using the VR1 preset can vary the reference voltage on pin 2, which also affects the sensitivity of the phototransistor.

The optical amplifier IC1 amplifies the signal received from the phototransistor. Resistance R3 controls the base current of transistor BC548 (T2). The high output of IC1 on the pin 6 moves the transistor T2 to activate the relay RL1 and switches on the apparatus, eg the hand dryer, through the contacts of the relay. The operation of the circuit is simple. In order to power the device, simply interrupt the infrared rays that fall on the phototransistor through the hand. During the interruption, the appliance remains switched on via the relay. When the hand is removed from the infrared beam, the device switches off via the relay.

[Image: 2A9_oct-_2-efy.jpg]

Mount the circuit to any general purpose PCB. Identify resistors through color coding or using the multimeter. Check polarity and IC pin configuration and mount with base. After soldering the circuit, connect the + 5V supply to the circuit.

Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Popular Searches: wireless switch curit using cd 4027, wireless switch using cd4027, wireless switch using cd4027 pdf, wireless battery switch using cd4027 ppt, abstract of wireless switch using ic1ca3140, ppt for wireless switch circuit using cd4027, l14g1 phototransistor,

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  to construct a switch using a transistor project 1 4,651 06-01-2019, 09:16 PM
Last Post:
  digital jewellery abstract in ieee format 4 4,014 11-07-2018, 09:00 PM
Last Post: farsanakuttickal
  hydrogen superhighway abstract 2 1,332 03-03-2018, 02:05 PM
Last Post: [email protected]
  future scope of wireless charging of mobile phones using microwaves seminarprojects com future scope of wireless chargin 3 3,013 11-10-2017, 03:53 PM
Last Post: jaseela123d
  physics project on transistor as a switch class 12th 1 2,680 03-10-2017, 10:10 PM
Last Post: Shreyasi Roy
  transistor as a switch full project file of class xll in pdf 9 22,304 29-06-2017, 01:29 PM
Last Post: jaseela123d
  adhoc wireless networks 8th sem cse notes 3 994 05-06-2017, 12:15 PM
Last Post: jaseela123d
  google driverless car abstract 2 619 23-05-2017, 11:52 AM
Last Post: Nasna Neenu KN
  project report on dc motor control using single switch 2 1,092 22-05-2017, 11:34 AM
Last Post: Deepak sahu
  abstract of embedded based customized wireless message circular system for college industries 1 644 13-04-2017, 10:45 AM
Last Post: jaseela123d

Forum Jump: