Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com has links to 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.

HOME Schematics Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches
Welcome to DiscoverCircuits.com - online since 2002

See Media Kit for
Advertising Opportunities

Attention Designers:  Please alert us by eMail if we have linked to sites
where your original material has been copied without your permission.
We will change to the LINK to your site.  
Thank you.

 

Amplifier Circuits:  Power Circuits
Power Amplifiers:  #'s - C        D - K        L - P         Q - S        T - Z

Amplifier -- Main Page

Last Updated: October 24, 2017 02:54 PM

Circuits Designed by Dave Johnson, P.E. :
FET Input High Speed Light Detector   -  This circuit is yet another design that converts current from a PIN photo diode to a voltage.  It has a bandwidth that extends beyond 50MHz . . . Circuit by David Johnson P.E.-June 17, 2000

Form Push-Pull Driver using N-Ch & P-Ch Transistors    -  This circuit can produce high speed output signals with fast rise and full times.  The unique change pump action allows the voltage of the upper P-ch device to range from millivolts to hundreds of volts.  The output current is only limited by the rating of . . . Hobby Circuit designed by David Johnson P.E.-June 27, 2000


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Faraday’s Guitar -  Experimenting with the fundamentals of electrical and electronics is always interesting.  Presented here is an electronic circuit that demonstrates Faraday’s law of electromagnetic induction and gives musical output.  The law talks __ Electronics Projects for You

Fast, 16-Bit Current Comparator -  Precision op-amp used as pre-comparator.  Schottky diodes in feedback limit output swing of amplifier to minimize slew delay.  Resistive input structure can be tailored for different trip points; this one detects a current sink of >50uA at the input __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Faux-phaser with LFO & manual (wah pedal) Modes. Schematic & & PCB layout. -  The original Phozer was a sound idea, but was hindered by its mashed-up development.  The circuit didn't really exceed the sum of its parts, namely Tim Escobedo's Idiot Wah and the LFO from the EA Tremolo.  The faux phase shifting effect was reasonably convincing at faster speeds, but the LFO failed to produce a true sweep at slower speeds.  Rather than ramp up and down, at slow speeds the LFO simply spent more time in the darker heel-down position between quick pulses of toe-down mode.  Also, we saw that using op-amps rather than discrete components would probably allow for a more complex effect with fewer parts. __ Contact: holler @ runoffgroove.Com

Fender Princeton adapted for use as a distortion stompbox -  One of the often overlooked Fender amps is the tweed-era Princeton.  They are excellent guitar amps, especially for blues playing.  The major drawback was the 4.5 watt output wasn't enough to keep up with a band.  Again, using the technique pioneered by Doug Hammond, we decided to try to capture some of the sound of this little amp in pedal form so it can be used with a band. __ Contact: holler @ runoffgroove.Com

FET Input High Speed Light Detector -  This circuit is yet another design that converts current from a PIN photo diode to a voltage.  It has a bandwidth that extends beyond 50MHz. . . Circuit by David Johnson P.E.-June, 2000

Fetzer Valve -  In the two years since the Fetzer Valve was first published in the midst of our adaptation of tube amps for use as distortion pedals, the circuit has enjoyed popularity as a standalone booster and as a building block in larger circuits.  While the circuit has its merits, we decided to further explore it to determine if it was a truly faithful solid-state version of the familiar input stage used in many tube amps. __ Contact: holler @ runoffgroove.Com

Five band graphic equalizer -  This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems.  The BA3812L is a five-point graphic equalizer that has all the required functions integrated onto one IC.  The IC is comprised of the five tone control circuits and input and output buffer amplifiers.  The BA3812L features low distortion, . 

Flipster -  When one thinks of classic bass amps, the brand name "Ampeg" often comes to mind.  Their SVT models were very popular and still are today.  Slightly less known Ampeg combo-type models were also made, called "Portaflex" amps.  In "travel" form, these appeared to be simple closed back speaker cabs with a pair of chrome latches on either side of the top panel.  When one released the latches, the top panel could be removed and flipped over to reveal a tube head unit.  One simply plugged in the attached speaker cable and the amp was ready to go.  The unique design led to the nickname of "Flip Tops." __ Contact: holler @ runoffgroove.Com

Foldback Loudspeaker System for Musicians -  It uses readily available drivers and can be built using basic hand and power tools. __ SiliconChip

Form Push-Pull Driver using N-Ch & P-Ch Transistors  -  This circuit can produce high speed output signals with fast rise and full times.  The unique change pump action allows the voltage of the upper P-ch device to range from millivolts to hundreds of volts.  The output current is only limited by the rating of . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

Four Channel fuzz Box -  This sophisticated fuzz designed by Craig Anderton splits an instrument signal into four specially equalized channels and fuzzes each channel separately for the smoothest, cleanest sustaining sound with minimum harshness.  Fuzz outputs are normalized to a single output but are also available at individual output jacks. __ Designed by John Simonton

Four channel power Amplifier with bi-amping & bridging options -  After building the Micro-Amp, I was not only impressed with the performance of the LM4780, but also felt ready to tackle a more ambitious metalwork project.  This is the result: four channels, with options for bi-amping and bridging. __  Designed by Mark Hennessy

Four-Watt AF Amplifer -  I have recently included a page about AF amplifers for use with Homebrew rigs.  In this I mentioned that I may include a practical one-watt circuit, complete with PCB foil and layout.  Here it is, but I have taken the liberty of engineering it to provide 4-watts of AF output and with a frequency response almost suitable for Hi-Fi applications __ Designed by Harry Lythall-SM0VPO

Fuzz-box -  All-FET design; Valve-like distortion behavior __ Contact: Flavio Dellepiane, fladello @ tin.it

FuzzniKator Push-Pull Tube Distortion/Preamp -  improved tube distortion project __ Designed by G. Forrest Cook

Fuzzy Firebottle Guitar Distortion Pedal -  single-ended tube distortion __ Designed by G. Forrest Cook

Gain 1000 Amplifier with 0.01% Accuracy, DC to 5Hz -  With a typical open loop gain value of 20 million V/V, very high closed loop gain amplifiers can be implemented with remarkable accuracy.  Even with such a high gain, the trimmed precision produces a dc output offset of only 20mV. __ Linear Technology/Analog Devices App Note, Jun 21, 2011

Gainclone Power Amplifier -  This is a basic design with a single LM3875TF chip per side, and one shared toroidal transformer.  I will be making two of these amplifiers simultaneously but with a few critical component differences.  One is based on standard components, and one on premium components.  There was a lot of deliberation on the

Ginger -  The Ampeg SB-12 Portaflex adapted for use as a bass guitar distortion stompbox. __ Contact: holler @ runoffgroove.Com

Grace / Big Daddy -  A few months ago, Aron Nelson released the Smash Drive.  The circuit ingeniously used an LM386 audio power amp chip to produce great distortion sounds.  Aron based his work on that of Tim Escobedo.  Tim's Stupidity Box was another great sounding unit and beautifully simplistic.  The Smokey Amp by Bruce Zinky was another design that used a 386 for some great sounds. __ Contact: holler @ runoffgroove.Com

Guitar & Bass Sustain -  A simple, low distortion limiter for musical instruments __ Designed by Rod Elliott  ESP

Guitar & Microphone Amplifier using TDA2005M -  This simple audio power amplifier works with guitars and microphones, delivering an output power of around 20W over a load of 4 ohms.  The amplifier circuit is built around IC TDA2005M and __ Electronics Projects for You

Guitar Amplifier 10 Watt -  10W Old-Style ultra-compact Combo; Two inputsOverdrive Treble-enhancement __ Contact: Flavio Dellepiane, fladello @ tin.it

Guitar and Microphone Amplifier Using TDA2005M -  This simple audio power amplifier works with guitars and microphones, delivering an output power of around 20W over a load of 4 ohms. The amplifier circuit is built around IC TDA2005M and

Guitar Cable Tester -  Here is a device that musicians will find highly useful.  It will detect breaks or shorts in a guitar or monitor cable.  Much more elaborate cable testers are available at music stores, but they are fairly complex and are mostly useful to road crews and t __ Designed by Andrew R. Morris

Guitar Control -  Stand-alone, 9V battery powered unit; Three-level input selector, three-band tone control __ Contact: Flavio Dellepiane, fladello @ tin.it

Guitar Effect -  Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well.  The circuit is so compact that it can be built into guitars or amps that do not have built in fuzz to add that capability to the instrument.  The circuit does not use much battery power, so a standard alkaline battery will last many years even with daily use. __ Designed by Aaron Cake

Guitar Effect Pedal Power -  A friend of mine plays guitar with several guitar effect pedals.  He had a problem with battery eliminators and cables of the pedals cluttering the stage and so he asked for __ Electronics Projects for You

Guitar Fuzz Box -  Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well.  The circuit is so compact that it can be built into guitars or amps that do not have built in fuzz to add that capability to the instrument.  The circuit does not use much battery power, so a standard alkaline battery will last many years even with daily use. __ Designed by Aaron Cake

Guitar Jammer for Practice & Jam Sessions -  Build it and jam along with your favourite CD, or use it to practice without disturbing others. __ SiliconChip

Guitar Reverb Effect Version 2 -  This is my second-generation guitar reverb circuit.  The fidelity is much improved over the earlier design, it is suitable for use as a front-end to a guitar amplifier.  This circuit features clipping indicators on the preamp and reverb recovery stages, allowing for the optimal gain settings __ Designed by G. Forrest Cook

Guitar Reverb Pedal -  This is a circuit for a guitar spring reverb pedal, it has dry, wet, and drive controls for a wide variety of sounds.  With a decent reverb spring (tank) in overdrive, this circuit will produce an incredibly thick and grungy sound, build one and be the envy of all of your guitar playing friends.  This thing is fun to play through __ Designed by G. Forrest Cook

Guitar Spring Reverb Unit -  A high performance spring reverb unit for guitar amps __ Designed by Rod Elliott  ESP

Guitar Tremolo Unit -  A versatile guitar effect.  This is a simple circuit that gives very good results __ Designed by Rod Elliott  ESP

Guitar Vibrato Unit -  A reasonably simple circuit, with results similar to the Vox AC30 guitar amp __ Designed by Rod Elliott  ESP

Guitar Vibrato Unit 1 -  A reasonably simple circuit, with results similar to the Vox AC30 guitar amp __ Designed by G. Forrest Cook

      <<<      >>>

Power Amplifiers: #'s - C        D - K        L - P         Q - S        T - Z

 


Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |   
Privacy Policy


Discovercircuits.com endeavors to credit original designers.   Please alert us by eMail so we can
delete links to material that have been copied without your permission
.   Thank you.


© Copyright of all original material on this website is the property
of David A. Johnson, P.E. (Dave Johnson & Associates ) unless otherwise noted.  

Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.
All material is provided "as is" without guarantees or warranty of any kind, either expressed or implied.