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Ir-Controlled Remote A/B Switch Circuit – Circuit Schematic
Ir-Controlled Remote A/B Switch Circuit
Useful for A/B control, the IR receiver shown controls a relay from an infrared beam that has a pulsed tone-modulated signal. Ql is the photo receptor feeding ...
Ir Pulse To Audio Converter Circuit – Circuit Schematic
Ir Pulse To Audio Converter Circuit
If your ear is good, you can use this IR-pulse-to-audio converter to troubleshoot infrared remote-controls. It is also a good project for detecting infrared-li...
Remote-Control Analyzer Circuit – Circuit Schematic
Remote-Control Analyzer Circuit
A schematic diagram for the remote analyzer is shown. The circuit is powered from a simple 5-V supply, consisting of PL1, SI, Tl, a bridge rectifier (comprised...
Remote-Controlled Switcher – Circuit Schematic
Remote-Controlled Switcher
This 1-cable system carries composite video (NTSC, PAL, or SECAM), power, and channelselect signals. The interfa...
Remote Selection Video Switch – Circuit Schematic
Remote Selection Video Switch
The A/B Switch circuit consists of three ICs and a handful of resistors. Two gates from a 4011 quad 2-input N...
Remote-Controlled Telephone/Fax Machine Switch – Circuit Schematic
Remote-Controlled Telephone/Fax Machine Switch
This system uses a transmitter at around 100 kHz (see Fig. 86-3(a)) to control a remote rece...
Infrared Remote Control Tester – Circuit Schematic
Infrared Remote Control Tester
Using a battery, a phototransistor and a visible-light LED, this simple circuit is a " "go/no go"" tester fo...
Ir Remote Extender – Circuit Schematic
Ir Remote Extender
This circuit can be used to operate a VCR or CD player from another room. It"s really an infrared signal repeater. The s...
Ir Transmitter – Circuit Schematic
Ir Transmitter
Using an NE567 as a tone oscillator, this circuit produces an IR signal from the LED, which is modulated with a square wave....
Simple Ir Transmitter – Circuit Schematic
Simple Ir Transmitter
The IR diode"s flash rate is determined by the value of CI, a 220-Â¥ capacitor that sets the rate of oscillation at 1 ...
Infrared Remote Controller – Circuit Schematic
Infrared Remote Controller
The transmitter is built around two CMOS 555 timer ICs (TLC 555s). The transmitter generates a modulated 35-kHz ...
Ir Receiver Ii – Circuit Schematic
Ir Receiver Ii
Q3 is an IR phototransistor that responds to a modulated IR beam. Q1 amplifies the ac component of the IR beam. Q2 drives a ...
Ir Receiver I – Circuit Schematic
Ir Receiver I
This receiver is built around a uPC1373 IR remote-control preamplifier, a sensitive 30-to-40 kHz tuned detector, an automatic...
Xenon-flash-trigger – Circuit Schematic
Xenon-flash-trigger
This circuit is used for remote photographic flash units that flash at the~ame time as the flash attached to the camera. This circuit is designed to the trigge...
Digital-ir-transmitter – Circuit Schematic
Digital-ir-transmitter
Gates U1a and U1b are configured as a low-frequency oscillator. The output waveform at pin 11 is nonsymmetrical with the positive portion of the signal, making...
Ir-transmitter – Circuit Schematic
Ir-transmitter
The transmitter consists of an oscillator which drives a high output IR emitting diode. The oscillator is a sJire start multivibrator circuit that provides an ...
Automobile-locater – Circuit Schematic
Automobile-locater
This locater is made up of two parts. The first is an rf oscillator, whose circuit is shown in Fig. 8-4a. The second is a sensitive receiver shown in Fig. 8-4b...
Remote ring extender switch – Circuit Schematic
Remote ring extender switch
The circuit can operate lamps and buzzers from the 120 V, 60 Hz power line while maintaining positive isolation betweenthe telephone line and the power line...
Remote on-off switch – Circuit Schematic
Remote on-off switch
This circuit provides power control without running line-voltage switch leads. The primary of a 6-volt filament transformer is connected between the gate and on...
Remote flash trigger – Circuit Schematic
Remote flash trigger
Transistor Ql is a light-activated silicon-controlled rectifier (LASCR). The gate is tripped by light entering a small iens built into the top cap. To operate, ...