Infrared

Infrared approach detector / sensor

Infrared approach detector / sensor

Basic operation of the monitor attached to the circuit is to detect objects (obstacles), at distances ranging from a few millimeters to and a few centimeters. Depending circuits used in industry and hospitals. The position sensor IC2 optoapomonotis used a type of Siemens SFH900 someone similar. The sign shows, led to a phase locked circuit (contained in IC1), which compares with signal frequency an oscillator which is also located within the same chip. For as long as the frequencies of two signals coincide, the pin output of IC1 (pin 8) is still reasonable 'O'. ..

Magnetic Cartridge Preamplifier (LT1028CN8)

Magnetic Cartridge Preamplifier (LT1028CN8)

A high performance op-amp that sets a new standard of excellence in noise performance only 0.9nV/Hz with low source resistances. Total harmonic distortion is less than 0.01%. The op-amp is suitable for use in high quality audio, low noise frequency synthesizers, infrared detectors etc. ..

Simple Infra-Red Transmitter/reciever Shematics

Simple Infra-Red Transmitter/reciever Shematics

This 1 channel infrared transmitter/receiver remote control is the cheapest and simplest you can find. The transmitter transmits a sequence of pulses on 36 KHz frequency carrier. The diodes are Schottky type because of their low voltage drop (only 0.2V). The ripple counter 74HC4060 contains an oscillator which controls the frequency carrier to be 36KHz...

Infrared light trap circuit

Infrared light trap circuit

This infrared light valve has more parts, so it works better and more reliable for alarms. The circuit responds less ambient light. The light valve consists of a transmitter and a receiver. The transmitter consists of a NE 555 which provides pulses to the infrared LED (D1) are fed. The frequency of the pulses is set to P1. On the receiver side we see the photo transistor T1 receives the pulses from D1. The pulses through C4 to the positive input of op amp IC2 led. Between the output of IC2 and the minus input is an RC network that ensures the lowest at about 7.2 kHz amplitude issues. ..

IR 4 channels remote control with PIC12F629

IR 4 channels remote control with PIC12F629

The circuit above illustrates using the IR receiver module along with a PIC12F629 microcontroller to decode 5 individual IR remote control keys so the circuit will only toggle one of the 4 outputs when a particular key is pressed. The 5th key is assigned to the master clear function that toggles off the 4 outputs. Works with most hand held IR remote controls that send a single data stream. However, some remotes send multiple groups of data and only the first set of 40 bits or less will be recognized. This may result in the circuit responding to more than one key, or a single key may control more than one toggle switch...

IR Remote Control Transmitter ATtiny28

IR Remote Control Transmitter ATtiny28

Use of IR (infrared) light as a method for wireless communication has become popular for remote control applications. There are a number of different standards for such communication. In this application note the widely used RC5 coding scheme from Philips will be described, and a fully working remote control solution will be presented. This application will use the ATtiny28 AVR microcontroller for this purpose. This powerful unit contains a hardware modulator, a high current LED driver and interrupt options which makes it especially well suited for these kinds of applications...

Infrared Headphone Amplifier circuit

Infrared Headphone Amplifier circuit

Using this low cost Project one can reproduce AUDIO from TV without disturbing anyone. It does not use any wire between TV and HEADPHONE. In place of pair of wires it uses invisible Infrared light to transmit audio signals from TV to Headphone. Without using any lens a range of up to 6 meters is possible. Range can be extended by using Lenses and Reflectors with IR sensors comprising transmitters and receivers. IR transmitter uses two-stage transistor amplifier to drive two IR leds connected in series. An audio output transformer is used (in reverse) to couple Audio output from TV to the IR transmitter. ..

Motorised Infrared volume remote control

Motorised Infrared volume remote control

A nice circuit for using with audio preamplifiers, or any other circuit that use potentiometer and you need to control it from distance. The circuit includes Infrared transmitter and reciever with motor controller chip BA6418N...

Infrared Remote Control Jammer circuit

Infrared Remote Control Jammer circuit

The IR Jammer is a fun project that provides a bit of safe, non-destructive fun. The Infrared Remote Control Jammer allows you to render all IR remote controls inoperative! The microcontroller in this design allows for all 6 of the main IR frequencies to be targeted making this unit universal. It works by corrupting the data that is being sent by your normal remote controls. A single press of the button sends out stream of IR pulses from the two narrow beam and two wide beam IR LEDs for 30 seconds. Each press of the button will add 30 seconds to the running timer. ..

Infrared remote Switch

Infrared remote Switch

This circuit lets you control any line powered electrical device (a lamp, television, fan, etc.) using any infra-red remote control. Almost everyone these days has a pile of old IR remotes left over from appliances they have long ago disposed of them. With this circuit, you can put them back into use. The circuit looks for any modulated IR source and uses it to control a TRIAC, which then switches any appliance connected to it's socket. For example, you can use it to control the room lighting in your home theater setup using any of the remotes you already have. The circuit is powered using a simple transformerless power supply from the line itself, making it compact and easily built into a light switch, wall box, power bar or even the appliance you wish to control...

Infrared Remote Control Repeater

Infrared Remote Control Repeater

This IR remote extender can increase the range of most simple IR remotes (those operating on a 40KHz modulation) a significant distance. In use, the remote is pointed toward the detector on the circuit, and a button is pressed. The Sharp IR detector then decodes the 40KHz modulated signal into a series of pulses, which trigger a 555 timer. The 555 outputs pulses which are re-modulated and used to drive an IR LED. The circuit is excellent for use in a large room like a presentation hall where a typical IR remote is a bit weak. By extending the wires to the output LED (using shielded cable) you can control a device where line of sight isn't available (such as a wall full of TVs in another room)...

Infrared Remote Control circuit

Infrared Remote Control circuit

The transmitter is shown and although straightforward, there are a couple of tricks that I had to incorporate to minimise battery drain during standby. Although the PIC quiescent current is only 200uA, that will still flatten a pair of AA or AAA 1.5V cells over time. The receiver provides motor drive (forward and reverse) for the motorised pot, and a relay for muting. The relay simply shorts out the preamp's output - this will not cause any damage to the preamp, as long as the relay contacts are connected directly to the output socket. When the circuit is powered on, there is an automatic mute for 10 seconds, but this may be disabled if you don't want it. ..

Infrared transmitter

Infrared transmitter

This is an IR transmitting circuit which can be used in many projects (I designed this to try to make my 3D glasses wireless). This IR transmitter sends 40 kHz (frequency can be adjusted using R2) carrier under computer control (computer can turn the IR transmission on and off). IR carriers at around 40 kHz carrier frequency are widely used in TV remote controlling and ICs for receiving these signals are quite easily available. The circuit can be controlled using any TTL or RS-232C level control signal which makes the interfacing very simple. The circuit can be used for example for using computer to generate IR remote control signals or experimental IR data transmission...

Infra-red detector circuit

Infra-red detector circuit

This circuit is a simple IR detector for testing IR remote controllers. The circuit is based on one phototransistor which receives the IR beam. The NPN transistor works as an amplifier which feeds current to the led. When this circuit detects IR or light, the LED is on. So you need to shield the phototransistor from ambient light if you don't want to do your tests in the dark. The best way is to fit the phototransistor in a small black tube. I used 2 cm long piece of insulating tube and fitted the phototransistor into the middle of the tube...

TV remote control Jamming circuit

TV remote control Jamming circuit

Just point this small device at the TV and the remote gets jammed . The circuit is self explanatory . 555 is wired as an astable multivibrator for a frequency of nearly 38 kHz. This is the frequency at which most of the modern TVs receive the IR beam . The transistor acts as a current source supplying roughly 25mA to the infra red LEDs. To increase the range of the circuit simply decrease the value of the 180 ohm resistor to not less than 100 ohm. It is required to adjust the 10K potentiometer while pointing the device at your TV to block the IR rays from the remote. This can be done by trial and error until the remote no longer responds...

Sort List by: Alphabetic Date Clicks Rank ascending | descending

Neighbour Categories

Xenon	Light Sensing	Led circuits	LCD circuits
Lighting	Laser	Fluorescent Circuits	Light Dimmers