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Infrared Circuits
IR Circuits:  #'s - A         B - H         I - K         L - Q         R - S         T - Z


Last Updated on:
Tuesday, October 24, 2017 02:55 PM

 

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Circuits Designed by Dave Johnson, P.E. :

Light/Dark Activated Motion DetectorThis circuit can sound an alarm when the shadow of a hand or arm moves over  two small photo diodes. . . Circuit by Dave Johnson P.E.-August, 2005

Micro Power 40Khz Burst Laser Diode DriverSome laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver.  The circuit operates from three 1.5v cells (4.5v) that should provide enough energy. . . Circuit by Dave Johnson P.E.-June, 2000

Operation of Cascode Light ReceiversThis page provides a detailed explanation of how the modified cascode light receiver circuit operates.  The cascode technique in conjunction with an inductive load provides very high current to voltage conversion as well as very high speed . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002

Optical Filter using Color Film NegativeThis isnít an electronic circuit but the file shows the curve for an optical filter made from exposed color film.  The material blocks most visible light but is very transparent to 880nM infrared light.  Kodak 100ASA is exposed to "cool white" fluorescent light for about 5 seconds . . . Hobby Circuit designed by David Johnson P.E.-January, 1998

Optical RFID Test CircuitI designed this test the concept of using light techniques to send identification data instead of RF.. . . Circuit by David Johnson P.E.-February, 2002

Piezoelectric Tap SwitchThis circuit uses a flat piezo wafer, glued inside a plastic box, as a finger tap sensor.  With each tap of a finger to the box holding the wafer, the circuit turns on and off AC or DC power to an external device.  The circuit is powered by a 9v battery. . . Circuit by David A. Johnson P.E.-December, 2010

Laser Light Show -  A programmable laser light show that allows the user to specify the pattern displayed via three motor speeds and the length of time that this pattern is held. __ Designed by Matt Melynk and Josh Silbermann

LC IF Filter -  My Sony ST-S555ES tuner originally came with four 250-kHz ceramic IF filters. Wide-IF mode uses the first two filters and narrow cascades all four. I wanted a more selective narrow-IF passband. I tried substituting two 180-kHz filters for the narrows, but the response was still too broad. I tried 180s in all four filter slots, but the center frequencies of the filters I had on hand did not match well. In frustration I decided to use two well-matched 180s in wide and build some LC filters for narrow. __ Designed by Brian Beezley K6STI

Learning IR remote control receiver using a PIC16F628 -  Infrared based electronic circuit diagrams / circuit schematics __ Designed by Peter Jakab

LED used for near-IR light -  09/01/98 EDN-Design Ideas NOTE :  File has many circuits, scroll down.  You can successfully use LEDs as sources of near-infrared light.  However, when you need a source of light with precisely controlled power, a feedback loop is necessary to compensate for the temporal and thermal changes of the LED parameters.  Standard LED types come with neither these monitoring detectors nor an external monitoring photodiode to detect part of the emitted light and generate a feedback signal.  The situation calls for some mechanical fixture to mount the photodiode. __ Circuit Design by Lukasz Sliwczynski, Marcin Lipinski, Institute of Electronics, Krakow, Poland

Light/Dark Activated Motion Detector -  This circuit can sound an alarm when the shadow of a hand or arm moves over  two small photo diodes. . . Circuit by Dave Johnson P.E.-August, 2005

Linux Infrared Remote Control LIRC -  This manual will guide you through the installation and configuration of LIRC.  Setting up LIRC currently is not an easy task.  So please take some time to read this documentation carefully.  If you don't understand a part of this manual or if you think there is something important missing you should complain __ Designed by Christoph Bartelmus

Long Range FM Transmitter -  This circuit is a circuit diagram fm transmitter.  This circuit is somewhat different from the previous fm transmitter circuit.  Transmitter circuit described here has the additional RF power amplifier stage, after the oscillator stage, to increase the power output of 200-250 milliwatts.  With a good matching 50-ohm ground plane antenna or multi-element yagi antenna, this transmitter can provide a good enough signal strength to a distance of about 2 kilometers.

Long Range FM Transmitter -  The power output of many transmitter circuits are very low because no power amplifier stages are incorporated.  The transmitter circuit described here has an extra RF power amplifier stage, after the oscillator stage, to raise the power output to 200-250 milliwatts.  With a good matching 50-ohm ground plane antenna or multi-element Yagi antenna, this transmitter can provide reasonably good signal strength up to a distance of about 2 kilometres.  The circuit built around transistor T1  (BF494) is a basic low-power variable-frequency VHF oscillator.  A varicap diode circuit is included to change the frequency of the transmitter and to provide frequency modulation by audio signals.  The output of the oscillator is about 50 milliwatts.  Transistor T2  (2N3866) forms a VHF-class A power amplifier.  It boosts the oscillator signal power four to five times.  Thus, 200-250 milliwatts of power is generated at the collector of transistor T2.

Long Range IR Transmitter -  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 kHz.  T1 is the __ Designed by D Mohankumar

Long-range 16-channel Remote Control SystE - M -  It's based on pre-built UHF modules, has a range of up to 1.5km and can be programmed just the way you want.__ SiliconChip

Long-Range IR Transmitter -  Most of the IR remotes work reliably within a range of 5 metres.  The circuit complexity increases if you design the IR transmitter for reliable operation over a longer range, say,...__ Electronics Projects for You

Low Costā High Performance Receiver for Wireless Applications 1/16/94  -  App Note  Doc #904  1/16/94 __ California Eastern Laboratories

Low power voltage-to-frequency converter makes a wireless probe for testing an inductive power supply -  26-May-05 EDN-Design Ideas Inductive pickup measures low-power circuit's supply __ Circuit Design by Francis Rodes, Eliane Garnier, and Salma Alozade, ENSEIRB Talence, France

Low-Power voltage-to-frequency converter makes a wireless probe for testing an inductive power supply -  05/26/05  EDN-Design Ideas Inductive pickup measures low-power circuit's supply __ Circuit Design by Francis Rodes, Eliane Garnier, and Salma Alozade, ENSEIRB Talence, France

Mark 1/1A -  This circuit is used to relay signals from an Infra Red remote control in one room to an IR controlled appliance in another room.   __ Designed by Andy Collison

Measuring the speed of light with an infrared LED / photodiode (TDOA) -  Infrared based electronic circuit diagrams / circuit schematics __ Designed by M. Gallant

Micro Based PIR to IR Remote Converter -  After the third attack on my car in 6 weeks, loosing 35 litres of fuel and generally having my day stuffed upI got really pissed off and embarked on the EKM-1 surveillance camera system.  Next time I want to get the act on video.  My first thought was to keep it simple and use a PIR  (passive Infra-red) motion detector to set off an alarm in my bedroomthen I would manually start my VCR and record video from a low-light camera. __ Designed by Eddie Matejowsky

Micro Power 40Khz Burst Laser Diode Driver -  Some laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver.  The circuit operates from three 1.5v cells  (4.5v) that should provide enough energy. . . Circuit by Dave Johnson P.E.-June, 2000

MIMO Wireless LAN PHY Layer (RF) Operation & Measurement Application Note 1509  -  Application Note__ Aligent

MK5 Infra Red Repeater -  The latest addition to my collection of Infra Red  (IR) Repeater circuits.  The Mark 5 is a much improved version of the Mark 1 circuit and has increased range and sensitivity.  It is also immune to the effects ofambient light, daylight and other forms of interference.  In addition it works with IR modulation freuencies in the range 30 to 120kHz making the Mk5 circuit the best choice for compatibility with remote controls __ Designed by Andy Collison

Modulation Detector for IR Remote Controls -  A circuit to extract and measure the modulated carrier of an Infra Red remote control.  Note that the circuit does not physically separate control pulses from modulation, but amplifies the completereceived signal allowing the waveform to be displayed ideally on an oscilloscope or a frequency counter.  Modulation frequencies between 1kHz and several MHz may be measured.   __ Designed by Andy Collison

Operation of Cascode Light Receivers -  This page provides a detailed explanation of how the modified cascode light receiver circuit operates.  The cascode technique in conjunction with an inductive load provides very high current to voltage conversion as well as very high speed . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002

Optical Filter using Color Film Negative -  This isnít an electronic circuit but the file shows the curve for an optical filter made from exposed color film.  The material blocks most visible light but is very transparent to 880nM infrared light.  Kodak 100ASA is exposed to "cool white" fluorescent light for about 5 seconds . . . Hobby Circuit designed by David Johnson P.E.-January, 1998

Optical RFID Test Circuit -  I designed this test the concept of using light techniques to send identification data instead of RF.. . . Circuit by David Johnson P.E.-February, 2002

PC Infrared Remote Receiver -  Build this simple unit and play DVDs and MP3s on your PC via remote control.__ SiliconChip

PCB for Mark 5 IR Extender -  The latest addition to my collection of Infra Red  (IR) Repeater circuits.  The Mark 5 is a much improved version of the Mark 1 circuit and has increased range and sensitivity.  It is also immune to the effects ofambient light, daylight and other forms of interference.  In addition it works with IR modulation freuencies in the range 30 to 120kHz making the Mk5 circuit the best choice for compatibility with remote controls __ Designed by Andy Collison

PC-Based Wireless Control for Toy Car -  Here we show how you can control a toy car through your PCís serial port using a pair of ASK transmitter and receiver modules. The received signal is decoded by a...__ Electronics Projects for You

Photo Electric Street Light -  This is basically a Schmitt Trigger circuit which receives input from a cadmium sulfide photo cell and controls a relay that can be used to switch off and on a street lamp at dawn and dusk.  I have built the circuit with a 120 ohm/12 volt relay and monitored performance using a lamp dimmer, but did not connect the relay to an outside light.  The photo cell should be shielded from the lamp to prevent feedback and is usually mounted above the light on top of a reflector and pointed upward at the sky so the lamp light does not strike the photo cell and switch off the lamp.  The photo cell is __ Designed by Bill Bowden

PIC16c505 IR/Wireless Remote Control -  Control up to 8 devices by this easy constructable remote control.  It can work as a radio or infrared remote control, depending on the components.  Each device output can be configured to be momentary  (turned on while you press the button) or latched.  Latched outputs can be toggled on/off by one button per channel, or turned on and off by two buttons per channel. __ Designed by Peter Jakab

Piezoelectric Tap Switch -  This circuit uses a flat piezo wafer, glued inside a plastic box, as a finger tap sensor.  With each tap of a finger to the box holding the wafer, the circuit turns on and off AC or DC power to an external device.  The circuit is powered by a 9v battery. . . Circuit by David A. Johnson P.E.-December, 2010

PIR to IR remote control -  After the third attack on my car in 6 weeks, loosing 35 litres of fuel and generally having my day stuffed upI got really pissed off and embarked on the EKM-1 surveillance camera system.  Next time I want to get the act on video.  My first thought was to keep it simple and use a PIR  (passive Infra-red) motion detector to set off an alarm in my bedroomthen I would manually start my VCR and record video from a low-light camera __ Designed by Eddie Matejowsky

Play with Robotic Eye (IR Sensor) -  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...__ Electronics Projects for You

Preamp Noise Figure Tables -  You can improve the sensitivity of an FM tuner by adding an RF preamplifier. The amount of improvement depends on preamp gain, preamp noise figure, and tuner noise figure. __ Designed by Brian Beezley K6STI

Programmable IR remote control -  NEC-SIRCS-JAPAN-RC5-SAMSUNG compatible, multiprotocol infrared remote control.  Replaces up to 6 existing remote controls into one.  With manual learning function, LED and/or LCD display...2V63V2, low power. __ Designed by Michel Bavin

Project to capture infrared remote control signals & play them back, based on Atmel ATMEGA48 micro -  Infrared based electronic circuit diagrams / circuit schematics

Pyroelectric Infrared (PIR) Sensor -  Tells how Pyroelectric sensors and Fresnel lenses are used in motion detectors.   (same as sensor manual above) __ Golab.com


Infrared Circuits
IR Circuits:  #'s - A         B - H         I - K         L - Q         R - S         T - Z

 


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