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Remote Control Circuits
Remote Controllers:  #'s - C        D - I        L - S        T - Z


Last Updated: December 31, 2017 10:22 AM
Circuits Designed by Dave Johnson, P.E. :

Remote Extender Circuit - This circuit is designed to be placed directly in front of a standard TV or VCR remote.  The exiting light pulses produced by the circuit match the pulses from the remote but are about 10 times more powerful.  Using the device, the remote can operate a TV or VCR over three times the normal distance. . . Circuit by David Johnson P.E.-June, 2000

Remote LED Indicator Light - There are times when you would like to transmit a signal from one LED indicator light to second LED at another location.  The circuit below works well for this application.  It takes advantage of the fact that the internal infrared LED inside an opto-isolator. . . Circuit by David Johnson P.E.-December, 2008

Remote Range Extender TV/VCR - I often get frustrated by how poor some infrared remotes in many new electronic devices operate.  I used to be able to turn on the TV from 30 feet away.  Now, it seems that I have to get within 15 feet.  To address this issue, I designed the circuit shown below.  The circuit taps into the TV remote’s existing infrared LED and drives 8 more efficient devices.  The result is a communications range some 4 to 5 times longer. . . . Hobby Circuit designed by David A. Johnson P.E.-December, 2000

Remote Relay Driver - I received a call from a Discover Circuits visitor who wanted a simple way to turn on an outside lighting system using a low voltage control line.    I suggested the simple circuit below.    The circuit is powered by a 9v battery and uses a very efficient latching relay.    Two low voltage wires lead from the a toggle switch to the remote relay.    A toggle switch selects either the on or off condition of the relay.    The relay contacts are rated at 10 amps, so the small relay can handle a sizeable amount of power.. . . Circuit by David Johnson P.E.-April, 2014

Remote TV Camera Power - A while back I received an email from a company with a problem.  They needed a security camera installed at some remote location.  The camera was a high quality color camera sending out standard NTSC video through a long 500 foot 50 ohm coax cable.  With some difficulty they got the coax strung.  They were told that there would be AC power near the camera location to power that device.  But, they then learned that in fact, there was no power available.  They thought about using a solar panel and a battery but they decided to call me for help instead.  Was there some way to power the camera without stringing another cable? . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2011

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Remote Doorbell Warning Switch -  This circuit should only be used with the solenoid type chime doorbells, the electronic type that play tunes will not work here __ Contact IQ Technologies

Remote Doorbell Warning Switch -  This circuit should only be used with the solenoid type chime doorbells, the electronic type that play tunes will not work here.  The hardest part for this circuit was the title.  it is quite easy to miss the sound of a doorbell if you are watching TV , this circuit gets round the problem by providing a visual indication, i.  e.  a lamp __ Designed by Andy Collison

Remote Extender Circuit -  This circuit is designed to be placed directly in front of a standard TV or VCR remote.  The exiting light pulses produced by the circuit match the pulses from the remote but are about 10 times more powerful.  Using the device, the remote can operate a TV or VCR over three times the normal distance. . . Circuit by David Johnson P.E.-June, 2000

Remote Fan Control -  November 09, 2011 - Design News:  The gadget comes with off/on, three fan speeds, and multicolored LEDs to indicate the fan’s speed.  As a bonus, it beeps to indicate that the fan got your message.   __ Designed by Andrew R. Morris, Gadget Freak-Case #198, Design News

Remote Half Bridge Digitizer Platinum RTD with Noise Suppression on Reference -  The LTC2414/LTC2418 are 8-/16-channel (4-/8-differential) micropower 24-bit ΔΣ analog-to-digital converters.  They operate from 2.7V to 5.5V and include an integrated oscillator, 2ppm iNL and 0.2ppm RMS noise.  They use delta-sigma technology and provide single cycle settling time for multiplexed applications.  Through a single __ Linear Technology/Analog Devices App Note, Mar 30th 2010

Remote humidity sensor needs no battery -  04/04/02 EDN Design Ideas:  Using ac-line power sources and batteries for remote humidity sensors is undesirable because these sources can be troublesome if you mount them in inaccessible points, such as smokestacks, cold-storage chambers, or darkrooms, where maintenance is difficult and inconvenient.  Figure 1 shows a simple way to remove the power source from the humidity-sensor circuit __ Circuit Design by Shyam Tiwari, Sensors Technology Private Ltd, Gwalior, India

Remote Infrared Terminal -  This unit provide 2 way iR communications using a numeric keypad and an LCD display.  Data is sent and recieved in acsii with no regard to what the data means to any particular device __ Designed by Luhan Monat-Mesa Arizona

Remote LED Annunciator -  iN THE BAD OLD DAYS, anyone rolling up at a department-store deli to buy a few slices of salami or whatever had to muscle their way through the crowd and try to attract the attention of a salesperson or they’d never get served.  it was much the same at employment offices and medical scanning departments, where the rudest and most obnoxious people were often attended to first.__ SiliconChip

Remote LED Indicator Light -  There are times when you would like to transmit a signal from one LED indicator light to second LED at another location.  The circuit below works well for this application.  it takes advantage of the fact that the internal infrared LED inside an opto-isolator. . . Circuit by David Johnson P.E.-December, 2008

Remote Monitoring System Sends E-mail via SMS  -  This App Note demonstrates how to make a simple system that monitors temperature and analog voltages remotely.  On meeting certain alarm conditions, the system can send SMS messages, which are then converted to E-mail and forwarded to the designated E-mail address__ Maxim Integrated

Remote Operated Home Appliances Circuit -  Suitable for operating, Lamps, Fan, Radio etc.., Small n easy unit Here is the circuit diagram of Remote Operated Home Appliances or Remote controlled Home appliances.  Connect this circuit to any of your home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote__ 

Remote Phone-Bell Ringer -  Did you ever miss an important telephone call simply because you were away where you couldn't hear the phone ringing? This should not happen again with this inexpensive remote telephone bell....__ Electronics Projects for You

Remote Range Extender TV/VCR -  i often get frustrated by how poor some infrared remotes in many new electronic devices operate.  I used to be able to turn on the TV from 30 feet away.  Now, it seems that I have to get within 15 feet.  To address this issue, I designed the circuit shown below.  The circuit taps into the TV remote’s existing infrared LED and drives 8 more efficient devices.  The result is a communications range some 4 to 5 times longer. . . . Hobby Circuit designed by David A. Johnson P.E.-December, 2000

Remote Relay -  Switch mains voltages safely with this easy-to-build unit__ SiliconChip

Remote Relay Driver -  i received a call from a Discover Circuits visitor who wanted a simple way to turn on an outside lighting system using a low voltage control line.    I suggested the simple circuit below.    The circuit is powered by a 9v battery and uses a very efficient latching relay.    Two low voltage wires lead from the a toggle switch to the remote relay.    A toggle switch selects either the on or off condition of the relay.    The relay contacts are rated at 10 amps, so the small relay can handle a sizeable amount of power.. . . Circuit by David Johnson P.E.-April, 2014

Remote Reset Gadget -  This was a trivial, but very useful hack for work.  The code is meant for an 8751, with 24 relays or optocouplers driven off ports 0-2.  Under serial port control, it will blip a selected relay for a half second or so.   __ Designed by Markus Wandel

Remote RF Xmiter -  This device was built into a small (1 1/4 by 2 inch) Radio Shack project box.  it features four push buttons which can produce 2 codes each. (Pushing a button for less than one second sends the first code, holding it for over one second sends the second code.)  __ Designed by Luhan Monat - Mesa Arizona

Remote Solar LED light -  i created this circuit in an attempt to make the simplest possible solar powered project.  it would make for an excellent science fair project, and would also serve as a good introduction to solar powered circuitry.  it may also have some practical uses, such as shedding some light into a dark part of your house.  The idea is simple, the solar panel converts sunlight into a trickle of electricity.  The electricity is used to run a white LED __ Designed by G. Forrest Cook

Remote Switch Uses No-Power Fiber-Optic Link -  10/10/96 EDN Design Ideas:  The heavy-duty switching device in Figure 1 counts the number of products manufactured and rolled out of a production line per hour.  The switch is useful for counting rolling heavy objects or materials weighing one to several thousand kilograms.  it generates one pulse per __ Circuit Design by Shyam Tiwari, IGKAR, Kalpakkam, India

Remote Telltale for Garage Doors -  if you have a perfect memory you won't need this.  But the rest of us could find it very handy!  it lets you know if you've left the garage door open without stumbling out in the dark or the pouring rain...__ SiliconChip

Remote Temp Sensor Needs No Power Supply -  12/21/95 EDN Design Ideas:  Measuring temperature at a remote location is a common requirement, but the implementation is usually not straightforward.  Most temperature sensors have a voltage or current output, which, to minimize noise pickup, should undergo conversion to digital form near the sensor.  Thus, an ADC, a digital interface, and a power supply must all be situated at the temperature-measurement point.  The circuit in Figure 1 monitors the temperature at a remote location and transmits that temperature to a host computer. __ Circuit Design by Wes Freeman, Analog Devices Inc  Santa Clara, CA

Remote TV Camera Power -  A while back I received an email from a company with a problem.  They needed a security camera installed at some remote location.  The camera was a high quality color camera sending out standard NTSC video through a long 500 foot 50 ohm coax cable.  With some difficulty they got the coax strung.  They were told that there would be AC power near the camera location to power that device.  But, they then learned that in fact, there was no power available.  They thought about using a solar panel and a battery but they decided to call me for help instead.  Was there some way to power the camera without stringing another cable? . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2011

Remote two wire positioner -  A simple and inexpensive way to remotely rotate a display or object is with a positioner that uses a stepper motor to rotate it.  The motor is driven by a circuit mounted near the motor and by a control circuit at a remote location.  __ Golab.com

Remote Volume Control for Stereo Amplifiers -  You can add a remote motorised volume control to just about any stereo amplifier.  Here's how to do__ SiliconChip

Remote Volume Control for the Ultra-LD Amplifier -  Revised preamp board lets you add our remote Volume Control unit to the Ultra-LD Stereo Amplifier__ SiliconChip

Remote Volume Control Part 2 -  Second article completes the construction & gives the set-up procedure__ SiliconChip

Remote-Alert -  Remotely-operates a Beeper and/or a LED via mains supply line __ Contact IQ Technologies

Remote-Controlled 6-Camera CcTV Switcher -  Closed-circuit television (CCTV) uses video cameras to transmit signals to specific monitors.  it differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point wireless...__ Electronics Projects for You

Remote-Controlled Fan Regulator -  Using this circuit, you can change the speed of the fan from your couch or bed.  infrared receiver module TSOP1738 is used to receive the infrared signal transmitted by remote control.__ Electronics Projects for You

Remote-Controlled Power- Off Switch -  Remote controllers for various audio/ video systems are usually provided with a power ‘on’/‘off’ or standby-mode selector button.  But turning the system off from the remote handset actually does not cut...__ Electronics Projects for You

Remote-controlled Preamp with Digital Pot -  This circuit is a simple but high-quality preamplifier using a DS1882 digital potentiometer, a device specially designed for audio applications.  The potentiometer is controlled over an i2C interface by an R8C/13 microcontroller.  The main features of the design are its remote control and lack of moving partsmust register on this site __ Designed by Published in Elecktor July/Aug, 2010

Remote-Controlled Smartfan using AT89c2051 -  The remote-controlled smartfans available in the market are very expensive and their operating principles are difficult to understand.  Here is a simple circuit for a remote-controlled smartfan that can control the...__ Electronics Projects for You

Remotely Programmable RTC Interfaced Microcontroller for Multiple Device Control -  This project based on Atmel AT89C52 and Dallas real-time-clock (RTC) chip DS12887 can be used to control and remotely program the switching operation of 24 electrically operated devices.  The devices can...__ Electronics Projects for You

Remote-Operated Master Switch -  Generally, a bedside master switch is used to switch on lamps both indoors and outdoors when there is a threat of intruder.  This circuit can be used to activate the master...__ Electronics Projects for You

Remote-Operated Musical Bell -  This infrared light controlled 12-tone musical bell can be operated using any TV remote control.  it can be operated from up to 10 metres, provided the remote control is directed towards...__ Electronics Projects for You

RF Remote Control System -  With a handful of inexpensive components, a little creativity, and the power of PicBasic, you can build some pretty outstanding robotics creations as Rob Arnold proves with his Ruf-Bot project.   __ Designed by Rob Arnold

Rolling Code 4-Channel UHF Remote Control -  it has a long range, its rolling code is virtually unbreakable, it uses a keyring transmitter and it's ideal for use with garage door controllers.__ SiliconChip

Rolling code 4-channel UHF remote Control -  it has a long range, its rolling code is virtually unbreakable, it uses a keyring transmitter and it's ideal for use with garage door controllers. __ Designed by Frank Crivelli & Peter Crowcroft

Room Monitor -  This circuit allows audio monitoring of a remote location and so doubles as a room monitor or baby alarm.  it can be run from a 12 Volt battery or mains power supply as shown below.  interconnect uses 3 wires, so multi core cable can be used; alarm or telephone cable is suitable just leave any extra wires free __ Designed by Andy Collison

RS-232C port scans remote keypad -  12/04/97 EDN Design Ideas:  in many embedded or control applications, you might prefer to use a small, customized keypad with your PC-based system rather than a full-fledged alphanumeric keyboard.  You may also need to locate the keypad some distance from the system hardware.  if you have __ Circuit Design by SK Shenoy, NPOL, Kochi, India

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Remote Controllers:  #'s - C        D - I        L - S        T - Z


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