How to make IR sensors (infrared LEDs) object-detection circuit.

-

How to make IR sensors (infrared LEDs)  object-detection circuit.

      There are various applications of IR sensors such as TV remote controllers, burglar alarms and object counters. Here we have used IR sensors (infrared LEDs) to make an object-detection circuit and also a proximity sensor for path-tracking robots. The basic idea is to transmit the infrared light through an IR LED, which is then reflected by any obstacle ahead and sensed by the receiving LED.

Electronics mini project; IR sensors (infrared LEDs) to make an object-detection circuit using ic LM358



Another circuit :-

      Infrared (IR) remote controller comprises the transmitter and receiver sections. The range of the transmitter can be increased up to 5 meter by using convex lens. Circuit Description of infrared (IR) remote controller

      Transmitter section: – The transmitter circuit of infrared (IR) remote controller is built around IC 741 (IC1) wired as frequency square wave oscillator. Gate pulse from pin no 6 of IC1 is given to gate of SCR1 to drive IR LED1. Variable resistor VR1 is used to vary the generated frequencies.  

Receiver Section: –

   The receiver circuit of infrared (IR) remote controller consist an IC 741, photo transistor (T1) and medium power transistor (T2). Photo transistor receives the transmitted signal and given to pin 2 of IC2 for amplification. The amplified output from pin 6 of IC2 is given to base of relay driver transistor (T2) through non- polarized capacitor C5, diode D1 and resistor R8. Variable resistor VR1 is used to match the transmitting and receiving signal.  


Circuit diagram of infrared remote control


PARTS LIST :-

Resistors (all ¼-watt, ± 5% Carbon) R1,R2 = 100 KΩ; R3, R5, R8 = 1 KΩ; R4 = 15 Ω; R6 = 22 KΩ; R7 = 10 MΩ; VR1 = 1 MΩ;  VR2 = 2.2 MΩ 

Capacitors C1, C3, C4 = 0.1 µF; C2 = 1 µF/100V; C5 = 2.2 µF/16V  

Semiconductors IC1, IC2 = 741; SCR1 = SN050; T1 = photo transistor; T2 = SL100; D1, D2 = 1N4001  

Miscellaneous RL1 = 15V, 500Ω Relay; IR LED



/./ 

Electronics mini project.

IR sensors (infrared LEDs) to make an object-detection circuit using ic LM358.

How to make IR sensors (infrared LEDs) to make an object-detection circuit.

IR sensor circuit.

How to make IR sensor circuit.






Comments

Post a Comment

Featured Post

How to make door Alarm Circuit using scr

-
Image
 Door Alarm using SCR    SCR ( silicon controlled Rectifier) also called Thyristor is a  semiconductor controlled rectifier is a four layer solid state current controlling device. Components : 1. 1 × Low Power scr 2. 1 × 9v Battery 3. 1 × buzzer 4. 2 × Switches 5. 1 × 1k ohm resistor ( may be vary) Circuit Diagram : Door Alarm system using SCR Working : 1. Make circuit as per Circuit Diagram. 2. Place switch in on door in that way when door is open, switch is closed. 3. When Switch is closed a triggering pulse apply to gate and scr is turn on. Attention :   To turn off  buzzer place one more switch between positive terminal and scr anode. OR remove Battery    
Read more

Low Power Inverter : Electronics Mini projects

-
Image
 Low Power Inverter : 12DC into 230-250V AC     Here is a  simple low-power inverter that converts 12V DC Into 230-250V AC. It can be used to power very light loads like Window chargers and night lamps, or Simply give shock to keep the intruders away. The circuit is built around Just two ICs, namely, IC CD4047 and IC ULN2004.      IC CD4047 (IC1) is a monostable / astable multivibrator. It is wired in astable mode and produces symmetrical pulses of 50 to 400 Hz, which are Given to IC2 via resistors R1 and R2.    IC ULN2004 (IC2) is a popular 7-channel Darlington array IC. Here, The three Darlington stages are Paralleled to amplify the frequencies Received from IC1. The output of IC2 Is fed to transformer X1 via resistors R3 and R4.     Transformer X1 (9V-0-9V, 500mA Secondary) is an ordinary step-down Transformer that is used here for the reverse function, i.e., step up. That Means it produces a high voltage. Resistors R3 and R4 are used to limit The output current from the ULN
Read more