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2242 CIRCUIT circuit

    
: Infrared control system



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AUDIO SWEEP OSCILATOR. This circuit was designed for a sound effect, but may serve other useful purposes when a basic, swept-frequency audio source is required. It produces both square and triangular wave outputs that ascend from about 80 to 730 Hertz in a repeating cycle of about 12 seconds. Appropriate component-value substitutions will yield variations in these parameters.
[ rar ] - WinRAR
Category:
Source: Art's Theremin Page
ECHO TONE OSCILLATOR. This simple circuit amplitude-modulates a single tone in such a manner to approximate the echo effect one might obtain, for instance, with sonar apparatus. Any reader who has been on a sonar-equipped vessel will realize that some imagination is required to appreciate the similarities among this simple scheme and the "real thing." However, this circuit might adjunct a small model (of a submarine, perhaps) to add the dimension of sound.
[ rar ] - WinRAR
Category:
Source: Art's Theremin Page
ROTATING SPROCKET WHEEL LISSAJUS GENERATOR. The circuit described here utilizes a Lissajus-pattern generator in conjunction with any typical analog oscilloscope capable of displaying x- and y-axis waveforms. The circuit displays an image of a slowly clockwise-rotating, six-tooth sprocket wheel. It employs several interesting techniques, including a digital timebase generator, a sine-cosine ("quadrature") synthesizer comprised of two finite-impulse response filters, and an amplitude commutator.
[ rar ] - WinRAR
Category:
Source: Art's Theremin Page
DIGITAL NOISE GENERATOR. This circuit produces a repeating sequence of serial data that contains attributes useful for emulating audible noise.
[ rar ] - WinRAR
Category:
Source: Art's Theremin Page
Universal Flasher Circuit (15k) This trouble-free two-wire flasher is indespensible.
[ pdf ] - Acrobat Reader
Category:
Source: Wenzel Associates
Flasher Circuit (16k) This two-transistor, two-wire circuit finds numerous applications.
[ pdf ] - Acrobat Reader
Category:
Source: Wenzel Associates
Tacho generator feedback circuit
Category:
Source: 4QDs pages
Oscillator circuit to find value of transistor ft
Category:
Source: Amateur-Circuitry
Ultrasonic transducer oscillator circuit
Category:
Source: Circuits Arhive- University of Washington
CONTINUITY TESTER. Among the essentials for circuit design and prototyping is the continuity tester, a simple device which provides an audible indication when a sufficiently low resistance is applied between its input probes. This version has a feature which automatically turns off the tester after about two minutes, thereby saving the 9 volt battery from inadvertent discharge.
[ rar ] - WinRAR
Category:
Source: Art's Theremin Page
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