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3 Level Audio Power Indicator - Battery-operated3 LED display that connect it to
loudspeaker output (added 04/02) |
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Acoustic Simulation Plug-in for Winamp (MP3) Players - A freeware plug-in called
"Speakers Simulator" for the Winamp MP3 player that simulates a natural soundfield in
headphones. The program employs a Fast Fourier Transform (FFT) filter which is
compensated to avoid Comb effects. The crossfeed delay ....Designed by Vladimir Kopjov
(circuit design added 04/05/06) |
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AN-663: Sound Effects for the COP800 Family - National Semiconductor Application
Note (app note added 2/06) |
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Automatic School Bell - Circuit / schematic (added 02/05) |
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Canary Sound Effect (Stepan Novotill) - Reverse engineered circuit diagram of a
commercial Electronic Bird. This one was built into a plastic christmas ornament and
runs off a 9V battery. Note that L1 is actually just an audio transformer with an
unused secondary winding. (added 10/04) |
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Cricket Chirping Generator - Funny gadget for props and jokes. 5, 12V
Battery operation. (circuit added 6/07) |
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Cuckoo sound Generator - This circuit generates a two-tone effect very much alike
the cuckoo sound. It can be used for door-bells or other purposes thanks to a built-in
audio amplifier and loudspeaker. Used as a sound effect generator it can be
connected to external amplifiers, tape recorders etc. In this case, the built-in audio
amplifier and loudspeaker may be omitted and the output taken from C8 and
ground.….(circuit design added 08/08) |
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DMX lighting & special effects - (circuit added 04/05/06) |
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Dog Whistle - (electronic Circuit diagram added 03/03/03) |
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Electronic canary - (electronic circuit added 2/07) |
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Electronic Canary Doorbell - This circuit is a modified "Hartley Oscillator" with
a couple extra parts. T1, the LT700 (Tony van Roon's or equivalent, is a small
center tapped (Tony van Roon's ct) audio transformer with an impedance of 1000 ohms at
1000 hertz. The secondary of this transformer has an impedance of 8 ohms.
Usually noted as 1K:8 ct. I tried a couple other models like the red and
green... (Tony van Roon's electronic design added 2/06) |
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Electronic Canary Sound Effect (Stepan Novotill) - Reverse engineered circuit
diagram of a commercial Electronic Bird. This one was built into a plastic christmas
ornament and runs off a 9V battery. Note that L1 is actually just an audio transformer
with an unused secondary winding. (added 2/05) |
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Electronic Chime - Scroll Down to find this circuit. This circuit simulates
a chime similar to the sound many cars make when the keys are left in the ignition.
The bottom two gates form a squarewave audio oscillator that drives the base of the
2N4401, turning it on and off at an audio rate. The top two gates produce a short
low-going pulse about once per second that discharges the 10 uF capacitor through the
diode. The voltage then jumps up and slowly decays .... (electronic design added 6/07) |
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Graphic Equalizer Pro - A shareware graphic equalizer program that operates in
real-time. Can adjust any sound source (such as the CD player) available on the PC's
soundcard mixer menu. See A Quick Guide To Headphone Accessories for tips on using an
equalizer with headphones. Requires Windows 9x/Me/NT/2000/XP. Designed by ANWIDA
Soft (circuit design added 04/05/06) |
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Infra Red Switch (Andy Collinson) - This is a single channel (on / off) universal
switch that may be used with any Infra Red remote control that uses wavelengths
between 850-950nm….(circuit design added 04/05/06) |
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Metronome & Pitch Generator - (circuit added 9/04) |
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Metronome Circuit - This circuit uses a couple of Op-amps to produce an
interesting sound effect. The left hand CA741 is wired as a standard astable and
produces the timing pulses, controlled by C1, R2 and VR1. The output is fed via
C2 to the second op-amp and is also direct coupled via the zener ZD1 to Q1.....(added
10/05) |
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Model Train Diesel & Horn Sound Module - TIL 112 opto isolator, 741, LM566 VCO,
CD4017 CMOS counter, LM386 power amplifier, LM556 dual timer (electronic
schematic / circuit added 4/02) |
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Noisemaking Circuits (police siren & chime) - (added 08/08/08) |
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Old-fashioned siren effect - (circuit added 6/07) |
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Rain Sound Effect Generator - Agreeable, relaxing effect, helping to fall asleep
Small portable unit, 3V battery powered (added 3/05) |
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Simple Two-Transistor Radio - Here is a simple radio that was designed to minimize
unusual parts; there isn't even a detector diode! The sensitivity isn't as high as the
one-transistor reflex but the simplicity is attractive. Strong stations will provide
plenty of volume ....(electronic design added 05/06/07) |
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Sound Effects for the COP800 Family - National Semiconductor Application Note
(app note added 2/06) |
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Sound Effects Generator - This circuit uses a UM3561 IC to produce four different
sound effects…(added 07/07/07) |
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Sound Effects Generator #2 (Andy Collinson) - (electronic schematic / circuit
added 4/02) |
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Sound Effects Generator (Andy Collinson) - (electronic schematic / circuit added
4/02) |
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Sound Effects Generator 2 - This circuit uses the Holtek HT2884 IC to produce 8
different sound effects…(added 07/07/07) |
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Two-Tone Train Horn - With this circuit you can electronically simulate the noise
of a diesel-train horn. The sound is triggered automatically as the train
reaches a desired place on the track so you can produce the sound as the train
approaches stations, level crossings, etc. The circuit can be built simply by using
one 556 or two 555 timers. The rest of the parts are readily available and not
critical. The output...(Tony van Roon's schematic / circuit added 2/07) |
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WaveSong - A shareware PC application that generates nature sounds (rain, surf,
crickets, thunder, pink noise, white noise) which are relaxing to hear and help mask
ambient noise when played through headphones or loudspeakers. Requires Windows
98/95/NT4.0/2000/ME. Designed by Jim Sells (Sagebrush Systems) (circuit
design added 03/08) |
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Weird Sound Generator - (electronic circuit added 08/08/08) |
