CONTROL CIRCUITS and PROJECTS
Infra Red Remote Control Extender
-This circuit is used to relay signals from an Infra Red remote control in one room to an IR controlled appliance in another room.
Infra Red Remote Control Extender Mark 2
-This is an improved IR remote control extender circuit. It has high noise immunity, is resistant to ambient and reflected light and has an increased range from remote control to the extender circuit of about 7 meters. It should work with any domestic apparatus that use 36-38kHz for the IR carrier frequency. Please note that this is NOT compatible with some satellite receivers that use 115KHz as a carrier frequency.
Infra Red Remote Control Extender Mark 3
-This Mark3 version of the Infra Red extender is a special version designed to control appliances that use high frequency modulated IR remote controls.
Infra Red Remote Control Extender Mark 4
-An Infra Red wired Repeater circuit to control appliances from a remote location.
Which Remote Control Extender do I build ?
-If you are thinking of building a remote control extender circuit then you may be unsure of which circuit to use. This article describes circuit differences to help you make the right choice.
Multi Launcher for model rockets
-This launch controller can be used with low voltage battery igniters, which fire rocket engines in model rockets such as the Estes range. These circuits are electrical, only switches and contacts are involved.
Infra Red Control Switch
-This is a single channel (on / off) universal switch that may be used with any Infra Red remote control using 36-38kHz.
Model Rocket Launch Controller by Matthew Hewson
-Most commercial rocket controllers available to buy are either expensive or do not have many features. This circuit project has the ability to control up to 8 pads through a 6 core cable.
IR Modulation Detector
-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.
R5000 Receiver Interface
-This circuit is a modified version of an original interface on QSL Net. It is a fully isolated interface allowing computer control of the Trio/Kenwood R5000 receiver. Separate software is needed to control the receiver.
Infra Red Remote Control Extender Mark 5
-This circuit and has increased range and sensitivity. It is also immune to the effects of ambient light, daylight and other forms of interference. In addition it works with IR modulation frequencies in the range 30 to 120kHz making the Mk5 circuit the best choice for compatibility with remote controls.
Electric Curtains
- The circuit controls a motor which is attached to a simple pulley mechanism, to move the curtains.
Computer Output Interface
-A versaile output interface that can control external devices direct from your computer. Uses freely available software and works with both windows and Linux.
CONTROLS for RC SERVOS
-Output control signal suitable for RC servo motors: 1-2 ms pulse with and pulse repeat rate is around 80 Hz
pump control in flash
- This is one of my stroboscope designs. Usually many stoboscope circuit work directly from mains voltage, but this circuit uses 12V DC intead od mains AC. This is very good idea if you don't want to mess with direct mains voltage connected circuit or you want to run the stroboscope from batteries.
RF Remote Control System
-This project uses the Ming TX-99 V3.0 300 MHz AM, RF Transmitter module shown below for transmitting data.
Automated Traffic Signal Controller
-his automated traffic signal controller can be made by suitably programming a GAL device. (For GAL
programming you may refer to the construction project published on page 52 in EFY’s September issue.)
fan speed control
-This circuit is basically is used to control fan speed in temperature room or in computer cpu
overheating protection control circuit
-two-chip circuit provides fan control and overtemperature warning and shutdown signals to protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die temperature of a CPU, an FPGA, or another IC with an on-chip temperature-sensing transistor.
Class D motor control circuit
-EDN-Design Ideas / Class D audio amplifiers provide a dual benefit for battery-powered portable devices. They enhance battery life, and they produce much less power dissipation than do their linear cousins. Those features make Class D amplifiers ideal candidates for controlling speed and direction in small electric motors
laser diode control circuit
-EDN - Design Ideas / Laser diodes are sensitive to ESD, rapid turn-on currents, and overvoltage conditions. To address those problems, the simple laser-diode controller in Figure 1 has several functions. The first part of the circuit comprises an 8.2V zener diode, D1 that forms the heart of a constant-voltage source for the laser diode
CO2 Controller for Planted Tanks
Fully Customizable RF Remote Control circuit
-Perfect as a remote replacement for access control and for switching on/off burglar alarms, it emits an RF code every time you digit the correct combination on its keyboard.
Computerized Infrared Remote control
- is a very simple device for recording and playing back streams of infrared data, in particuliar the codes transmitted via remote controls
Constant Temperature Control Circuit
-This circuit is a generic low power temperature controller that can be used for stabilizing temperature sensitive electronic circuits. It was built to stabilize a radio frequency VFO (Variable Frequency Oscillator) for ham radio applications. The circuit has also been used to lower the drift of a Ramsey FM10a micropower FM transmitter
Controller IC and one shot form resonant controller
EDN - Design Ideas / Resonant power supplies are popular because of high efficiency, low noise, and compactness. You can implement a resonant buck or boost converter using a single switch. The regulation of the output in such a converter derives from using a constant on or off time and a variable frequency
Controlling a Light With Two or more Switches
-These pages describe how to use 3-way and 4-way switches to control lights from two or more locations. This is the first of several related pages explaining how to control lights with multiple switches. Unless you already have a good understanding of the intricacies of 3- and 4-way switches, you should read at least the first three of these pages in order.
Controlling slew times tames EMI in offline supplies
EDN - Design Ideas / EMI from offline switching power supplies typically causes all sorts of problems for power-supply designers. You may need a large EMI filter to meet FCC emission requirements. Switchers for high efficiency produce high-frequency switching noise that can propagate through the rest of the system and cause problems
Decoding Infrared Remote Controls
- I suggested to use the infrared remote control as an input keyboard for a microcontroller board and mentioned a piece of code I had written for the 8052 microcontroller. I was asked by some people to share my information about remote controls
Digital Automatic Gain Control (AGC)
-This project is a digital Automatic Gain Control (“AGC”) system using a PIC16F876 MCU. The ability to set the gain level in a circuit and have it control itself is a very useful function. This circuit is a building block of another project I am working on. A 30W power amp for either the PCS, iDEN or CDMA frequency bands. I will settle on one of those frequencies sometime soon
Dimmer/ Motor Speed Control
-Lamp dimmers using traics can be quite simple, nothing more than a potentiometer, resistor, capacitor and triac with a built-in diac. The circuit below is similar to designs using unijunction transistors to generate the triggering pulse. The unijunction is replaced by a two-transistor "flasher" circuit that drives a pulse transformer. This type of circuit gives a wide range of control while exhibiting little hysteresis or line voltage sensitivity.
Engine Control unit Schematics
-The original plans for the ECU called for a very simple unit designed to keep the engine within parameters and the use of a faster, more capable, compiled Microchip controller.
simple Infrared Remote Control
-simple circuit which controls one relay output
Infrared Remote Control Extender
-This circuit is used to relay signals from an Infra Red remote control in one room to an IR controlled appliance in another room.
Infrared Remote Control Of your PC
-There shouldn't be reasons today to build a remote control reception circuit with discreet digital logic. However, some time ago microcontrollers weren't so versatile as nowadays: almost all were OTP, expensive and with just a few peripherals. That's why it was 'logic' to use discreet digital logic circuitry
Infrared Remote Control Tester
-A simple IR receiver to facilitate in testing of Infra Red Remote Control handsets.
Infrared Remote Control Tester 2
-simple infrared remote control tester circuit. It is built around using available infrared receivers.
Infrared Remote Home Control
Infrared Control Switch
-This is a single channel (on / off) universal switch that may be used with any Infra Red remote control using 36-38kHz. (This is a very common remote handset frequency). In place of IR1 a TSOP1738 receiver may be used.
Infrared Toy Car Motor Controller
-this infrared remote controll circuits enables a toy car to on/off via infrared
Light Controlled Switch
-output a control signal suitable for relay depending on the light level
Linux Infrared Remote Control (LIRC)
-LIRC is a package that allows you to decode and send infra-red signals of many (but not all) commonly used remote controls.
Long Range Infrared Remote
-You can construct your own long range infrared (IR) wireless remote using Motorola's MC145026 emitter and MC145027 detector chips. With your remote you can control devices up to 20 feet (7 meters) away. It operates similiarly to a TV remote. You just point the emitter at the detector, push a transmit button. The detector then interprets your data signal. You can use this circuit to remotely turn on/off devices (like a motors, relays, home appliances)
Power source is insensitive to load changes
-For the heating and cooling elements common in industrial systems, resistance is not a fixed quantity. These elements include such devices as positive-temperature-coefficient heaters and thermoelectric coolers.
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).
Remote Controlled a Volt Switch
-Infrared Controlled AV Switch with S-Video, Composite Video, and Audio
Remote Solar LED Light
-The remote solar powered LED light takes advantage of the current limited nature of solar photovoltaic cells. If light shines on the solar array, current will flow through the circuit. For a typical size of solar cell, there is a maximum current that can be produced.
RF Remote Control System
-RF remote control is just way too cool not to use in your designs, but if you're a newbie like me it's difficult to successfully build solid RF transmitters and receivers on your own.
Serial Servo Motor Controller
-The first servo controller project at http://www.rentron.com/servo.htm had the com port fixed at com1. This new version will seek out the available com ports on your PC and then let you select the desired port and baud rates.
Servo Slew Rate Control
-This circuit will impose a maximum slew rate on a signal; positive and negative rates can be independently controlled. The circuit is useful in servo applications where the error signal needs to be limited to be within the power rails to ensure predictable operation.
Short dc power line pulses afford remote control
-EDN - Design Ideas / If you face the challenge of adding a second, independently controlled light source to an existing ceiling lamp controlled by a wall switch, you may find that stringing a second power line is impossible.
