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Audio Amp - (circuit added 7/02) |
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Audio Amp Based on LM383 8 Watts (Aaron Cake) - (circuit added 7/02) |
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Audio Amp Output Power Limiter - (diagram added 6/03) |
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Audio Amplifier Output Relay Delay - This is a simple circuit which I built to one
of my audio amplifier projects to control speaker output relay. The purpose of this
circuit is to control relay which turns on speaker output relay in audio amplifier.
The idea of circuit is wait around 5 seconds after power up until speakers are
switched to amplifiers output .... (added 11/05) |
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Audio Booster with 1 Transistor - (Tony van Roon's circuit added 9/04) |
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Audio Line Driver - (electronic design added 6/07) |
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Audio Preamplifier Circuits - A very convenient way of making an intercom is to
use a loudspeaker as a microphone. This is a preamp with a low input impedance
suitable for this purpose...(electronic design added 6/07) |
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Automatic Loudness Control - Simple add-on module Switchable "Control-flat"
option (added 3/05) |
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Automotive 12V to +-20V converter (for audio Amplifier) - The limitation of car
supply voltage (12V) forces to convert the voltages to higher in order to power audio
amplifiers. In fact the max audio power x speaker (with 4 ohm impedance) using 12V
is.... (added 6/07) |
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Automotive Voltage Indicator - Monitors battery voltage, Three-LED Display
(circuit added 6/07) |
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AV Audio/Video Wireless Transmitter - (electronic circuit added 4/05) |
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Balanced Low Noise Microphone Preamp - very low noise, close to oretical minimum,
high hum rejection and variable gain with a single rotary pot, similar to that used in
many professional grade mixing desks (added 4/02) |
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Bidirectional 2.4 GHz One Watt Amplifier - (diagram added 6/03) |
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Bride of Zen - The Bride of Zen (BOZ), designed by Nelson Pass and described in
The Audio Amateur, 1994, is a very simple line-level preamplifier which contains just
one medium-power MOSfet per channel (see the schematic further down on this page). It
is meant to be used with the Zen …(electroninc design added 04/05/06) |
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Bridging Adapter for Power Amplifiers - (electronic circuit added 7/03) |
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Brystom Power Amplifiers Circuit Diagrams - (circuit added 7/02) |
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Build the Hummer to Find Pin 1 Problems in Equipment - AS032 Jenson Transformer
Application Note (app note 08/08/08) |
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Capacitance Multiplier Power Supply For Class-A Amplifiers - A basic circuit is
provided in the article, but it is assumed that the builder knows all the pitfalls.
The supplied schematic is in fact for a capacitance multiplier filter (not a
regulator), but is somewhat lacking (I feel) and can be improved
dramatically....(added 05/08) |
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Car PreAmplifier & Artificial Earth - Especially for car audio installations, can
be used for any single supply system (circuit / schematic design added 6/06) |
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Cascode Tube Microphone Input Stage - AS054 Jenson Transformer Application Note
(app note 6/07) |
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Circuit Combines Power Supply & Audio Amplifier - 12/20/01 EDN-Design Ideas: The
circuit in Figure 1 can help if you must transfer dc power and audio over a pair of
copper wires. One application for such a circuit is a low-cost door-opening system
with speech input. The circuit uses only one IC, the well-known LM317, a low-cost
power-supply regulator. Using this chip, you..../.....(design idea added 10/03) |
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Class D Audio Power Amplifiers - 01/04/01 EDN-Design Ideas: -Class D amplifiers
are much more efficient than other Classical amplifiers, but their high efficiency
comes at the expense of increased noise and distortion. You can assess the
frequencyand Time-domain characteristics of a Class D amplifier, including the output
filter, using online simulations.....(design idea added 8/03) |
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Class T Digital Audio Amplifier Evaluation Board - This App Note describes a
digital amplifier, which operates from13.5-Volt power source and outputs up to20W poor
channel power. The App Note is in PDF format. Uses a Digital Power Processing
Technology EB TA2020 from Tripath Technology. (added 4/02) |
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Compact 50W Integrated Amplifier with Meier Headphone Section - (electronic
circuit added 2/07) |
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Computer Microphone - circuit by Lazar Pancic - adapting electret microphone to
soundcards with dynamic microphone inputs(electronic design added 6/07) |
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Constant Current Battery Charger - A simple method of charging a battery from a
higher voltage battery is shown in the circuit below to the left. Only one resistor is
needed to set the desired charging current and is calculated by dividing the
difference in battery voltages by the charge current. So, for example if 4 high
capacity (4000 mA hour) ni-cads are to be charged at 300 mA from a 12 volt battery,
the resistor need,....(circuit added 7/02) |
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Converts 600 Ohm Unbalanced Mic to 150 Ohm Balanced Mic Line - AS049 Jenson
Transformer Application Note (app note 11/02) |
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Crest Audio LT Series LT100 LT1500 & Lt2000 SchematIC Set - A commercial Class D
Amplifier, complete schematics in PDF format. (added 4/02) |
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Current Feedback Amp - The amplifier shown here was previously incorrectly
referred to as 'El-Cheapo'. Thanks to a reader who had a copy of the original 1964
article, it was immediately obvious that my recollection was flawed in the extreme….
(diagram added 6/03) |
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Death of Zen Doz a New Class a Power Amp - An ultra simple, high performance
Class-A power amp. Revision-A boards now shipping (schematic / circuit design added
9/02) |
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Direct Injection Box for Recording & Psystems - passive and active DI-box designs
(added 4/02) |
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Dual Phantom Power Pre-Amp - (circuit / schematic design added 6/06) |
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Dynakit Mark E 40 Watt Power Amplifier - (circuit / schematic added 09/08) |
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ECM Mic Preamplifier - A high quality preamp for electret mic inserts |
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Famous Twin-Servo 990 Mic Preamp Basic Circuit - AS083 Jenson Transformer
Application Note (app note 6/07) |
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Five Tube Stereo Amplifier - (circuit added 2/07) |
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Flashing Heart (grantronics) - Here is a fun project that you can give to that
"someone special". How about Mother's Day or did you forget St Valentine's
Day?….(electronic design added 6/07) |
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General purpose 2 x 2 Watts power Amplifier - If you are a real electronics
amateur, than you'll need a good audio power amplifier to be used in your endless
experiments. Contents: Schematics, PCB's and photos.….(circuit design added 08/08) |
