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

Last Updated: December 31, 2017 06:45 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:

Radio Control made from Junk -  Here we are going to make a simple radio controlled device using supplies from your local dumpster.  This project should cost less than a dollar to make.  if you spend more than a dollar on this project, you need to dig more.   __ Designed by sixmhz @ yahoo.com

Radio Remote Control using DTMF -  Here is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances.  This remote control unit has 4 channels which can be easily extended to 12.  This circuit differs from similar circuits in view of its simplicity and a totally different concept of generating the control signals __ Designed by Radioland.net

RC Controlled Digital Camera -  The aim of this project was to get a digital camera into a small electric radio controlled (RC) airplane and still have it fly.  The airplane shown, a park flyer, weighs between 400 and 550 grams depending on the size of battery and wing configuration that I use __ Contact r dot p @ webone.com.au

RC Low-Pass Filter -  (spice design)  __ Designed by Rick 

RC lowpass filter expands microcomputer’s output port -  06/21/07  EDN Design Ideas:  A simple lowpass RC filter allows a single output pin of a microcontroller to expand the number of output bits __ Circuit Design by Rex Niven, Forty Trout Electronics, Eltham, Victoria, Australia

RC Network Eliminates Precision Reference -  08/04/94 EDN Design Ideas:  The circuit in Fig 1 uses a magneto-resistive sensor to detect small magnet displacements without resorting to a precision voltage reference.  A simple RC divider takes the place of the reference, eliminating an expensive component __ Circuit Design by Christophe Basso, European Synchrotron Radiation Facility, Grenoble, France

RC network quashes auxiliary winding in quasiresonant converter -  04/01/04  EDN Design Ideas:  Quasi-square-wave-resonant converters, also known as QR (quasiresonant] converters, allow the design of flyback-type SMPSs (switch-mode power supplies] with a reduced EMi (electromagnetic-interference] signature and improved efficiency __ Circuit Design by Nicolas Cyr, On Semiconductor, Toulouse, France

RC Notch Filter (Twin T) -  The twin T notch filter can be used block an unwanted frequency or if placed around an op-amp as a bandpass filter.  The notch frequency occurs where the capacitive reactance equals the resistance Xc=R and if the values are close, the attenuation can be very high and the notch frequency virtually eliminated __ Designed by Bill Bowden

RC Receiver Hosts Two Independent Switches -  06/06/96  EDN Design Ideas:  Typical inexpensive radio-control (RC] systems have servo-motor outputs, but no on/off switch outputs.  You can add two independent RC switches to a system without making any transmitter or receiver modifications __ Circuit Design by Tom Howell, US Army ARDEC, Picatinny Arsenal, Dover, NJ

RC Servo Tester with 555 IC -  Servo refers to an error sensing feedback control which is used to correct the performance of a system.  Servo motor is a DC motor equipped with a servo mechanism for precise control of angular position.  Servo motors usually have a rotation limit from 90° to 180°.  Servos are used for precision positioning in robotic __ Designed by T.K. Hareendran

RC Speed Controller -  fed up of paying £20 for controllers? This 10amp pic version has braking and calibration features.   __ Contact P. Townshend - EduTek Ltd

RCM710 Electronic Scale -  RCM710 ELECTRONIC  SCALE - Technical Design Manual__ Airborn Electronics, Australia

RD68HC908IRC : MC68HC908QT2 Based Simple Circuit Infrared Remote Control Reference Design -  Motorola has developed a simple, single dedicated device, infrared remote control designed to control a DVD player.  This reference design demonstrates how to time and create modulated infrared signals used to control six basic functions of the DVD player.   __ Designed by Freescale

Remote Access to Raspberry Pi -  Raspberry Pi is an excellent platform to learn programming and interfacing of a computer with the real world.  But it is always annoying to move to a completely different setup to...__ Electronics Projects for You

Remote Audio Level Indicator -  The normal level-indicator circuits which are available in the market require connections to be made to the output of the player, which may not be easily accessible.  The audio level indicator circuit described here removes this restriction as it may be placed close to the player’s speakers and yet the desired effect can be __ Designed by Popescu Marian

Remote Charging uses Three Wire Sensing -  05/25/95 EDN Design Ideas:  Remote voltage sensing usually uses a four wire sensing System, this System works with three Wires.    __ Circuit Design by D Hayden, Tempo Research, Vista, CA

Remote Control -  This is a simple wireless remote control unit, which was originally designed for a model hovercraft which I was developing with the help of my friend Uday Arya.  The project has been discontinued for technical reasons, but this remote control unit survives.  The method used seems to be quite popular among many remote control units.  __ 

Remote Control -  in the article ‘RGB LED Mood Lighting’ (Elektor, February 2008) we mentioned that a remote control could be added to the unit.  Here we describe how it is done, connecting an eZ430-RF2500 to the MSP430 microcontroller.  The ideas presented can be adapted to a wide range of other applications --- must register on this site __ Designed by Published in Elecktor July/Aug, 2010

Remote Control based on PIC -  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

Remote Control Beeper -  uses rf tx/rx modules with a range of about 30m.   __ Contact P. Townshend - EduTek Ltd

Remote Control Dog Door Opener -  Gadget Freak: Remote Control Dog Door Opener.    Sometimes you can't teach an old dog new tricks.  Tired of trudging down the stairs to let his dog out of his cage in the middle of the night, Les designed a remote control door opener.  The system.   __ Designed by Gadget Freak

Remote Control Encoder/Decoder with PIC16C620 & PIC12C508 -  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

Remote Control Extender Mk 4 -  An infra Red wired Repeater circuit to control appliances from a remote location. __ Designed by Andy Collison

Remote Control for Home Appliances -  The influx of the internet of things (ioT) devices has created a huge demand for connecting everything to everything.  in the same race, this remote control for home appliances lets you...__ Electronics Projects for You

Remote Control for Raymarine ST4000 Autopilot -  Schematic Only  -uses raytheon's seatalk®communications protocol. (16f628)  __ Designed by Jon Fick

Remote Control for Sony a/  Volt Equipment -  PIC  based remote controller for infrared and wired Control-S bus __ Designed by Eric Smith

Remote Control for Toy Car -  Make any battery-operated toy car remote-controlled using this circuit.  The circuit, consisting of an infrared transmitter-receiver pair, uses iR beam transmission to switch the toy car 'on' or 'off '.  To...__ Electronics Projects for You

Remote Control Jammer -  Collection of Gag circuits, scroll to find this one.  Do you have an incessant channel hopper that is driving you crazy? Or perhaps you simply want to enforce your own selections.  The TV Remote Control Jammer will do the trick. 

This circuit is a redo of an older design which is not effective on modern remotes.  Modern remote controls are hard to jam but with a little care this circuit will do the job.  The circuit is just a flasher operating at 40 kHz which is the carrier frequency used by common remote controls.  The strong 40 kHz infrared flashing interferes with the signal from the remote.   __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

Remote Control Of Webcam through Internet -  Necessity is the mother of invention, and that’s how I could find a smart solution for controlling my webcam from a remote location where distance is no limit.  This article describes...__ Electronics Projects for You

Remote Control Transmitter -  Although ready-made remote controls are easy to get, with this project we show how to build on at home.  Features are impressive, with 6 radio channels and long battery life.  Complete with PCB layout.   __ Designed by Projects & Ideas from Nutchip.com

Remote control transmitter-control Devices from the PC -  Control all your devices from the PC.  This infrared remote control transmitter can be controlled from a computer.  it speaks many different remote control formats, like the Philips RC-5 standard and can be tailored to other specific types.   __ Designed by Peter Jakab

Remote control turns battery on & off -  09/12/97 EDN Design Ideas:  The circuit in Figure 1 acts as a latching solid-state relay.  A short application of a magnetic field in the vicinity of S1 toggles the relay on and off.  The relay switches power from a 3V battery at load currents as high as 10 mA.  This remote switch is ideal for battery-powered applications.  in the off state, the circuit draws no current; in the on state, the circuit draws only 100 µA.  All the parts are inexpensive and readily available.    __ Circuit Design by Allen Harstine,Integrated Measurement Systems Inc, Beaverton, OR

Remote control uses an IR Receiver chip to receive the IR signal from the remote -  The circuit uses an iR receiver chip to receive the iR signal from the remote. The chip includes a bandpass filter and a demodulator, so the output is a logic signal.   The signal is then processed by an Atmel 89C2051 chip that decodes the remote signal and controls the volume pot and relays. __ Contact mcs @ post5 . Tele . dk

Remote control using telephone -  Here is a tele-remote circuit which enables switching "on" and "off" of appliances through Telephone lines.  The circuit described here can be used to switch up to nine appliances (corresponding to the digits1 through 9 of DTMF the Telephone key-pad).  The Telephone can be used to switch__ 

Remote control using VHF Modules -  A few designs for remote control switches, using VG40T and VG40R remote control pair, are shown here.  The miniature transmitter module shown in Fig.1, which just measures 34 mm x 29 mm x 10 mm, can be used to operate all remote control receiver-cum-switch combinations described in this project __ Designed by Radioland.net

Remote Control using Wireless Doorbell -  This circuit lets you wirelessly control an appliance from a remote place by using a wireless doorbell.  The appliance is triggered by the signal from the transmitter of the wireless doorbell...__ Electronics Projects for You

Remote Control Your Computer -  The circuit shown above is a simple infrared receiver.   Heart of the circuit is TSOP-1738 infrared detector chip.  TSOP-1738 detects infrared signals generated by your remote and generates electrical pulses on its out pin.  These electrical pulses finally goes into your computer via serial port's DCD pin. __ ` Sigmatone

Remote control-build your own -  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

Remote Controlled Alarm -  A very interesting remote controlled alarm circuit using TSOP1736.  Routing of an electric cable to attach a calling bell switch near the bed of an old age/patient is not a good idea.  Here is an ultra simple battery operated remote controlled alarm to help old age members/patients in bed, especially at home/hospital.  Any __ Designed by T.K. Hareendran

Remote Controlled Digital Audio Processor -  These days most audio systems come with remote controllers.  However, no such facility is provided for normal audio amplifiers.  Such audio controllers are not available even in kit form.  This article...__ Electronics Projects for You

Remote Controlled Lighting -  This remote controlled switch circuit can control AC loads such as lights, fans etc through the remote handset of TV.  it uses the 555 timer in the bistable mode.  in the bistable mode output IC 555 keeps two states, either low or high.  When a negative pulse is applied to the trigger pin 2 of 555, the output turns high and __ Designed by D Mohankumar

Remote Controlled Sign -  Nowadays, remote controls are cheap enough to allow addition to any kind of electronic device, included simple ones.  in order to have a remote controlled,  __ Designed by Projects & Ideas from Nutchip.com

Remote CPU/ASIC/FPGA Temperature Sensor -  The LTC2997 is a high-accuracy analog output temperature sensor.  it converts the temperature of an external sensor or its own temperature to an analog voltage output.  A built-in algorithm eliminates errors due to series resistance between the LTC2997 and the sensor diode.  __ Linear Technology/Analog Devices App Notes, Jul 7th 2011

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

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