Need to design a simple and useful security alarm then you can refer this IR Based security Alarm using 555 timer prototype. In this circuit IR (Infra Red) beam acts as a Invisible fence, whenever the IR Rays are blocked then this circuit will produce alert sound through loud speaker.
This circuit has two stage, first one is IR emitter & IR receiver stage then second one is Astable Multivibrator timer circuit, Here the timer circuit Reset pin is Accessed by the IR stage hence the multivibrator oscillates when the IR rays blocked.
This circuit has two stage, first one is IR emitter & IR receiver stage then second one is Astable Multivibrator timer circuit, Here the timer circuit Reset pin is Accessed by the IR stage hence the multivibrator oscillates when the IR rays blocked.
Circuit Diagram
A simple InfraRed(IR) receiver circuit using TSOP1738 IC. Also known as remote tester, this circuit can turn on LED whenever any button on the remote control is pressed. The heart of this circuit. This Long range Infrared transmitter can emit pulsed IR rays up to 10 meters. This IR transmitter is ideal to use in Infrared receivers using Phototransistor or Photodiode as IR sensor. The circuit is a simple Astable Multivibrator using IC NE555. Resistors R1, R2 and capacitor C1 fix the output frequency to 1. For standard 555 timers use timing resistor values between 1K ohms and 1M ohms. Monostable Circuit Example Figure 6 shows a complete 555 monostable multivibrator circuit with simple edge triggering. Closing switch S1 starts the 5 second timing interval and turns on LED1. At the end of the timing interval LED1 will turn off. 555 Timer IC-555 timer is an integrated circuit used for timer, pulse, oscillator application. They can be used to the time delays, flip-flop. They can be used to the time delays, flip-flop. They have 8 pins so easy, and small circuits. The program for the microcontroller is difficult to understand. Here is a simple and inexpensive circuit for an RGB bulb using 555 timer. This 555 timer project is available at: RGB Bulb Using NE555 Timer. False Triggering Eliminator for Timer 555. Normally, false triggering of timer IC 555 takes place during power on, resulting in unwanted output, which starts the timer’s time cycle. The circuit becomes inefficient especially when the load has to be energised only when desired.
Components Required
- IR LED Photo diode pair
- IC 555
- Loud speaker 8Ω
- Resistors 220Ω, 10KΩ, 1KΩ, 150KΩ each one
- Variable Resistor 10KΩ
- LED green
- Capacitors 0.1μF = 2, 0.01μF
- Transistor BC547
- Battery 9V
Construction & Working
Here IC 555 timer is configured in Astable multivibrator mode and Reset pin is connected with Q1 transistor collector terminal, this Q1 transistor acts as a switch and connects the Reset pin to Ground if the IR rays received by photo diode and connects with positive supply if there IR rays blocked. Western digital drive repair.
The IR LED gives IR rays continuously and it should be placed towards photo diode in straight line.
Hunting games for windows 10. Here the timer IC output frequency is depends on the timer Resistor R4, VR1 and timer capacitor C2, by varying VR1 we can get different level output sound at loud speaker.
Simple infrared receiver
This is a simple infrared receiver for the burglar alarm system or the other protection, etc. It uses a few components that there are most common transistors and photodiode receive an infrared signal. As Infrared Remote control transmitter by IC-555-BD137. Let’s build the Infrared receiver circuits. Which we have too many circuits. To begin with, the simple circuit as Figure 1. We will see that a photodiode connects in the reverse bias form. So, while the infrared light to hit it. It has very little current through it. Figure 1 The simple Infrared receiver circuit But when the infrared light turn photodiode PD1. It will cause the current to flow through the diode is good. Next, it causes a voltage signal to the frequency of the signal transmitter set to transistor TR1(BC549). Which it connect with TR2(BC557) that is in an amplifier circuit with gain about 1000 times. Both capacitors C2 and C3 are the high pass filter circuit. While both diodes D2 and D3(1N4148) acts as the convert AC voltage signal to DCV. By has C5 will filter current to smooth. Last, The voltage output drive transistor TR3 to the relay works. The relay so work when has the infrared light from the transmission to the receiver. If the beam is cut or obscured. The relay will stop working. This circuit is suitable for use in the burglar alarm system or the other protection, etc.Build Simple IR receiver circuit
We should make PCB layout as Figure 2 due to the high-frequency receiver from photodiode as low current. So was very disturbing. Figure 2 the PCB layout and components layout of simple infrared receiverThe component list Q1____BC549____45V 100mA NPN TransistorQ2____BC557____45V 100mA PNP TransistorRY1___Relay 12V coilD1,D2____1N4148____75V 150mA DiodesD6___Photodiode D5,D6__1N4001____1A 50V DiodesC1____0.022uF 50V Ceramic capacitorsC2____100uF 25V electrolytic capacitorsC3____0.01uF 50V Ceramic capacitorsC6____2.2uF 25V electrolytic capacitorsC7____470uF 25V electrolytic capacitorsR1____22K 1/4W ResistorsR2____1.8M__________”R3____6.8K________”R4____1K__________”R5____1M__________”R6___4.7K_________”Simple remote control tester circuit
I am going to show you a simple remote control tester circuit. When the remote control is broken. We cannot use it. First, we should check the battery. If the battery is good. The remote circuit may be a problem. We cannot check it with a normal tool, multimeter. This simple remote control tester circuit may help you. It can read an infrared light of remote control.How it works
This circuit acts like the infrared receiver of electrical appliances. Because the human eye cannot see infrared light. But a phototransistor can detect infrared light. In this Simple remote control tester circuit. So we use the phototransistor as the light receiver from the remote control. If it is good. The phototransistor-Q1 will get the infrared light, the current flows through it to the base of Q2(PNP transistorIr Transmitter Circuit With 555
BC558). It switches on. the current from the ground can flow through R1 to Q1. The Q1(PNP transistor) also gets a bias current. It is working. So LED1 lights up. Because a high current passes it. The variable resistor VR1 is used to adjust the sensitivity of the circuit. Related of Simple Remote Control circuitsHow to build this project
If you want to make this project. First, you may test them on a breadboard. So easy to make.Parts you will need
0.25W Resistors, tolerance: 5% R1: 10KR2: 470ΩR3: 1MVR1: 100K Potentiometer Semiconductors and others: Q1,Q2: BC558, 45V 0.1A, PNP TO-92 TransistorQ3: EP103, Phototransistor9V battery When you like it. You can assemble them into Universal Board as Figure 2![Ir Circuit Using 555 Ir Circuit Using 555](/uploads/1/1/8/4/118482648/258330641.jpg)
Keep reading:
Special Infrared receiver using LM1458 CD40103
As This simple projects, If you want the circuit with special features, can set the program to the circuit works. When you enter the input pulse signal of 1-256 time. Consider the circuits Infra Red Receiver for a larger version as described below. The special infrared receiver circuit. This contains 4 main parts of the work as follows: the signal receiver and filter circuit, the set waveform, the frequency divider and the driver relay circuit. The receiver signal and filter circuit. The component is received a signal is a photodiode D1, the signal that across D1 will be sent to the filter circuit that will allow the 5KHz frequency only can through it. Which consist of the feedback circuit R4, R5, and C2 that join with IC1. The determining circuit will cause a![Ir remote tester circuit diagram using 555 timer Ir remote tester circuit diagram using 555 timer](/uploads/1/1/8/4/118482648/349741265.jpg)
Setting IR receiver waveform
Since the waveform that may be inappropriate. We must set a new wave, which it has a range of up and down change quickly. Then, the setting circuits consist of a wave which is compared to IC1B. Input voltage with a defined voltage at Pin 2. will set a high outputIr Circuit Using 555 Minutes
. But if the voltage lower than pin 2 then the voltage output is “0” This setting causes the noise signal that may be unusual to be eliminated.The LED-D4 is LED display of circuit. we know that the signal from the sender is entered the receiver to complete. Then, the IC2-CD4093 will set the waveform. Which IC2A and IC2B is the Schmitt trigger form. And the IC2C act as an inverter circuit. After that, the signal flow to the frequency divider-IC3-CD40103 The frequency divider circuit The frequency divider circuit works by using the divided frequency IC as a program types From the 2-256 number with setting the voltage at the control input pin. Which has 8 pin is the pin 4,5,6,7,10,11,12,13. The program is a binary base 2 by 1 = positive, 0 = ground. For LED-D5 show the working of the output pulse from the frequency divider circuit. Last, the output as above will flow to the transistor TR1 to the driver the relay to works as desired.Build Special IR receiver circuit
First of all, We can assemble all components of circuits onto the PCB. When you are sure all the wires and components are installed correctly. Next, experimental enter the DC power 9 volts to the receiver. It has scope hold at pin 3 of IC will see is the frequency bands 5Khz. But if there is no scope to capture the notice of the diodes will feel warm. After that, to connect the voltage to set the receiver signal to the photodiode LED D4, adjust VR1 until full brightness. Which normal is in the center. In general, we can use this receiver in a range of about 3.5 M. However, you want more than this far. You may use a combined optical blade. In addition, the photodiode should be in a sealed box, allowing only the aperture only. To avoid the signal of natural light. Setting counts number As above that, Setting counts possible input voltage at input pin counts to a decimal number by 2. Also the infrared circuitRelated Posts
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