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Remote Control Circuits, Page 1
Remote Controllers:  #'s       A - C       D - H       I       J - Q        R        S - Z
Last Updated on: Wednesday, July 16, 2014 06:35 AM


Circuits Designed by Dave Johnson, P.E. :
  • 1uS LIGHT PULSE RECEIVER PLUS POST AMP
    This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage amplifier is included with a gain of about X20. The circuit is described in more detail in the receiver section of my Handbook of Optical Through the Air Communications.  Note: The LF357 op amp is no longer available, this circuit is for reference only.

  • 30KHZ LIGHT RECEIVER AMP -- This circuit uses NPN darlington transistor to amplify the signal produced from short light flashes, as detected by a PIN photo diode.  The circuit draws only about 330uA from a 6v battery.

  • 40KHz LASER BURST DETECTOR -- This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst, modulated at 40KHz. It is very sensitive and could be modified for long-range laser communications.

  • 40KHz LIGHT RECEIVER IS IMMUNE TO AMBIENT LIGHT --If you want even more sensitivity than the above circuit, try this design. When used with a one-centimeter square photodiode, you can achieve a range of several hundred feet with a standard TV or VCR remote control module.

  • 40KHz MODULATED LIGHT DETECTOR
    This circuit uses a unique cascode amplifier circuit to convert the current from a PIN photo diode to a current without any feedback network. It is very stable and very sensitive. The circuit shown has the potential for a conversion factor of 10 volts per microwatt at 900nm. I included a simple JFET post-amplifier with a gain of about 20.

  • 40KHZ LED TEST SIGNAL GENERATOR
    This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals.

  • 40KHz TV-VCR LIGHT SOURCE REPEATER
    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.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
0-10V Control for RC Servos -  In this circuit NE555 is configured as astable multivibrator.  main timing capacitor (220 nF) is always changed to  voltage level which is determined by  voltage on NE555 pin 5 (in this circuit that voltage is aroun 1.6V). When  timing capacitor is....(added 05/09/09)
1us Light Pulse Receiver Plus Post Amp -  This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage amplifier is included with a gain of about X20. The circuit is described in more detail in the receiver section of my Handbook of Optical Through the Air Communications.  Note: The LF357 op amp is no longer available, this circuit is for reference only.... [Designed by David A. Johnson]
1-Wire network controls remote SPI peripherals -  4-Sep-08 Issue of EDNThis circuit controls a remote LED display by the 1-wire network through an SPI-compatible display controller.... [Design Idea by Michael Petersen, Maxim Integrated Products, Colorado Springs, CO]
2 channel RF remote control -  This RF remote control it runs at 418MHz frequency and support up to 2 channels. It is very safety as the transmiting code is changing every time you push any button (roll-code function).(electronic schematic added 03/09)
2 Line Intercom Plus a Telephone Changeover Switch -   circuit presented here can be used for connecting two telephones in parallel and also as a2-line intercom. (added 5/02)
2 Wire Remote Microphone Amplifier  -  (electronic circuit added 7/03)
2-CH RF Remote Control -  On these pages, I will introduce Remote Controller with Radio Frequency. The electric wave sending-out is controlled with the code by PIC for transmission and the code is deciphered by PIC for receiving. .(electronic schematic added 11/08)
3 Channel IR Remote Control -  This project is a 3-channel IR remote control with 3 output relay and easy to build. Features: CPU PIC12F629 at 4MHz crystal for Tx/Rx, 3 channel output relay, The Tx use sleep mode for saving battery power, Use Phillips RC5 protocol, distance more than 7 m, Easy circuit to build and assembly and small amount of components. Uses RC5 protocol which is probably the most used by hobbyists, probably because the wide availability of cheap remote controls and easy to understand. .(electronic schematic added 11/08)
3 Channel RF AVR Remote Control -  How many times you needed some remote control to handle some electric device ? many times. There are lot of remote controls like infrared, RF, SMS (like my other circuit) and more. The basic small-range remote controls are 2, Infrared and RF (Radio Frequency). One of the weaks of Infrared is that the signal can not pass the walls. So, if you want to control your garage door, the only way is to use some RF remote control. The circuit (transmitter and receiver) use few components and ordinary (I love few component circuits) . Its easy to build it because you don't have to tune-up any coil or variable capacitor. The RF modules are fix to work in 418MHz area. .(electronic schematic added 11/08)
3 Channel RF Remote Control -  This is a 3 channel RF remote control project.The transmitter powered by 3V battery(coin size) range about 10 m.  This remote control I use PIC12F509 from Microchip which is a 8-pin single-chip microcontroller designed for low pin count applications with 1 K words flash memory and 41Byte SRAM and some special features such Power-saving Sleep mode,Wake-up from Sleep on pin change. .(electronic schematic added 11/08)
300 MHz AM RF Remote Control System -  (electronic schematic / circuit added 4/02)
30kHz Light Receiver Amp -  This circuit uses NPN darlington transistor to amplify the signal produced from short light flashes, as detected by a PIN photo diode.  The circuit draws only about 330uA from a 6v battery.... [Designed by David A. Johnson]
35kHz Magnetic-Radiation Remote-Control -  (electronic circuit added 4/05)
40kHz Laser Burst Detector -  This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst, modulated at 40KHz. It is very sensitive and could be modified for long-range laser communications.... [Designed by David A. Johnson]
40kHz LED Test Signal Generator -  This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals.... [Designed by David A. Johnson]
40kHz Light Receiver Amp -  This circuit is similar to number 121 but provides more gain and operates up to 40KHz.  However it draws more power supply current.... [Designed by David A. Johnson]
40kHz Light Receiver Is Immune to Ambient Light -  If you want even more sensitivity than the above circuit, try this design. When used with a one-centimeter square photodiode, you can achieve a range of several hundred feet with a standard TV or VCR remote control module.... [Designed by David A. Johnson]
40kHz Modulated Light Detector -  This circuit uses a unique cascode amplifier circuit to convert the current from a PIN photo diode to a current without any feedback network. It is very stable and very sensitive. The circuit shown has the potential for a conversion factor of 10 volts per microwatt at 900nm. I included a simple JFET post-amplifier with a gain of about 20.... [Designed by David A. Johnson]
40kHz TV-VCR Light Source Repeater -  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.... [Designed by David A. Johnson]
8 channel IR remote control -  This IR remote control that you can use to control other devices or circuits up to 8 devices. The control codes are sent in RC5 format modulated to about 38 kHz carrier frequency.The IR transmitter powered by the CR2016 which is a 3V button Cells Battery CR2016. To extend the life of the battery this is done by putting the CPU into SLEEP mode for most of the time and wake-up only when a key is pressed. .(electronic schematic added 11/08)
8 Channel RF Remote Control -  This is an 8 Channel RF Remote Transmitter and Receiver that will allow to remotely control various electronic projects. RF Remote Control provides 2 latched and 6 momentary outputs that could be used to control your favorite devices such as amplifier, robotic devices, RC cars, computer, home appliances, lamps and many other cool gadgets. .(electronic schematic added 11/08)

Remote Controllers:  #'s       A - C       D - H       I       J - Q        R        S - Z

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