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Tape Head Demagnetizer Cassette - This model charges up a
capacitor to a pre-determined voltage and then dumps it into a
demagnetizer oscillator using an SCR. The LED lights when finished...
[Reverse engineered schematic by Stepan Novotill] |
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Telephone Headgear - A compact, inexpensive and low component
count telecom headset can be constructed using two readily available
transistors and a few other electronic components. Since the circuit
draws very little current, it is ideal for parallel operation with
electronic Telephone set. (added 4/02) |
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Telephone Headset Amplifier - This circuit goes between a
telephone and a headset. The project has a headset cord and plug (cut
from a cheap cell phone headset) on the input and a suitable jack on
the output. The speaker signal passes through this circuit, but the
microphone signal is passed straight from the plug to the jack. This
circuit is specifically....Designed by Andrew R. Morris (added 09/05)
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Telephone Record Control - This circuit will allow you to connect
any tape recorder that has a mic and remote input to a phone line and
automatically record both sides of a conversation when ever the phone
is in use.You will need to take a couple of voltage readings before
connecting the circuit…. [Circuit designed by Randy Linscott] |
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Telephone Recorder - This circuit lets you record your ph1-conversations
automatically, notice that this circuit does not provide isolation between Telephone
line and the recorder…. [The design by Aaron Cake] |
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Telephone Recording Circuit - How they work and some example (added 4/02) [Tomi
Engdahl] |
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Terrestrial Set-Top Box NTSC/PAL - Intersil Application Block Diagram (app note
added 6/06) |
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The Collected Grado Headphone Mods - This collection of Grado headphone
modifications comes from posts by Skippy, Beagle, TimD, Voyager, Neruda, Chych and
Squirt in the HeadWize forums. The mods are grouped into 3 categories: Transducer,
Earcups and Headband, Earpads, Cables. There are even instructions for how to fix the
infamous Grado "grattle." The article specifically.... Designed by Skippy et al.
(Circuit design added 01/08) |
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The Technology of the Fuzz Face - The Fuzz Face remains an enigma today, perhaps
three decades after it first hit the market. This simple, two transistor circuit
remains for many the very definition of the guitar effects stomp pedal. What makes
such a simple circuit the stuff of legend?....(Circuit design added 04/05/06)
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Theremin - This circuit uses a common CMOS 4069 IC. The MC14069 is pin for pin
compatible….(Tony van Roon's circuits added 08/09) [Tony van Roon's circuit] |
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Theremin Controller - (electronic circuit added 4/05) |
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Theremin Model Introduction - Since the publication of the type 144 theremin
project article in September, 1998, many of them have been successfully constructed.
As in the 144, and its forerunner, the Southwest Technical Products model 142, the 145
theremin retains a heterodyne topology similar to that used by Mr. Theremin in his
original instruments. (8/03) |
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Tiny audio Amplifier using LM386 - ….(electronic schematic added 08/08) [Site is
underconstruction right now] |
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Tone Detector - (electronic circuit added 7/03) |
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Tone Generator - (electronic circuit added 7/03) |
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Top-Level OTL Tube Headphone Amplifier - This article shows my tube headphone
amplifier designs for driving headphones with an impedance of 200 to 600 ohms (I am
using these amplifiers with the Sennheiser 580, which has a 300-ohm impedance). The
problem with many tube headphone amplifiers.... (Circuit design added 9/06)
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Transistor Organ - This simple circuit can provide hours of enjoyment as you
learn tunes, play duets or just make some really weird sounds by pushing all the
buttons at once. You have probably seen this circuit before, it is fairly common. I
have seen it in several… [Designed by Aaron Cake] |
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Troubleshooting Electrostatic Headphones - Tips for troubleshooting and repairing
electrostatic headphones. Designed by Mark Rehorst (Circuit design added 08/08/08)
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Truth About Vocal Eliminators - Sometimes a vocal can be removed almost
completely, but just as often the results are disappointing, just information without
circuit diagrams (added 4/02) |
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Two Line Output Combiner - Convert consumer equipment stereo signal to mono or
combine audio signal from two different equipments to1-input (added 4/02) |
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Two way cross-over 3500 Hz - ….(design added 08/08) [Site is underconstruction
right now] |
