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Description: An Infra Red wired Repeater circuit to control appliances from a remote location. Parts List: R1: 1k Resistor (1) R2: 3.3k Resistor (1) R3: 10k Resistor (1) R4: 15k Resistor (1) R5: 2k2 Resistor (1) R6: 470R Resistor (1) R7: 47R Resistor (1) 0.5 Watt PR1: 4.7k Preset (1) C1,C3: 47u Elect(2) C2: 1n Polyester 5% or better (1) C4: 100u Elect(1) Z1: 5V1 Zener (1) Q1: BC549C or BC109C or 2N2222 (1) Q2: BC337 or BC549 or ZTX450 (1) IC1 : TSOP1738 IC2: 555 or 7555 (1) LED1 5mm RED (1) LED2,3 IR diode TIL38 or similar (2) Alternatives to IC1 : Everlight IR receiver module ELIRM 8621 Harrison electronics IR1 Vishay TSOP 1838 Radio Shack 276-0137 Sony SBX 1620-12 Sharp GP1U271R  Notes: The signal emitted by an IR remote control contains two parts, the control pulses and a modulated carrier wave. The control pulses are used to modulate the carrier, a popular modulation frequency being 36 and 42KHz. The signal is radiated by an IR diode, typical wavelengths in the 850 and 950 n...

Infrared light has a difference with ordinary light in general. We can see clearly when a light or light on an object. As with the infrared light we can not see the manifestation of these rays. Frankly I can not answer when asked why the infrared rays are not visible in the eyes of us. So at night do not hope you can make light by using infrared light. One thing that is often heard from many people that infrared light can utilized for the functions of a camera that can see in dark conditions is often called an infrared camera. Actually I have explained the working principles of electronic circuit section in this blog is about the basic working principle of a series of infrared sensors are simple. To design this sensor circuit you should not find trouble if you ever make another series of sensors. It's just that the sensor circuit consists of the transmitter and receiver, to learn the basic principles of this series of infrared you can see in the Basic Principles Series Infrared Tra...

To explore how different motion detectors operate.To successfully build and test an ambient-light-ignoring active IR motion detector. Background  There are a wide variety of motion detectors available currently. To allow a better understanding of motion detectors,the following section provides a detailed description of a few different types. Ultrasonic Motion Detectors Ultrasonic transducers can be used to detect motion in an area where there are not supposed to be any moving objects.This type of motion detector is most commonly used in burglar alarm systems since they are very effective in this application.  Figure 1 shows the operation of an ultrasonic motiondetector. There are tw1o transducers: one emits an ultrasonicwave and the other picks up reflections from the differentobjects in the area. The reflected waves arrive at the receiverin constant phase if none of the objects in the area are moving.If something moves, the received signal is shifted in phase.  A phase c...

I use my computer every single minute, I do my work at home and I need to finish lots of paperwork. My computer helps me in almost everything I do. I make sure that my pc is able to do multitasking and functioning well. Just like our body, it should be fit to do all the workload that must be finished within the day. To come up with another task that a pc can add to its functions, an IR remote was created through an FTDI that receives and transmits data other than the Universal Serial Bus. This is definitely a big help that my pc can easily cope up with simultaneously.