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1.5kW Power Amplifier - Just the thing for those for whom no amount of power is
enough (schematic added 6/07) |
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100 Watt RMS Amplifier - This is a100-Watt basic power amp that was designed to be
(relatively) easy to build at a reasonable cost. It has better performance (read:
musical quality) than standard STK module amps that are used in practically every
mass market ….(added 4/02) |
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100W Guitar Amplifier Mk II - The original of the unit above. Retained for
posterity, and has speaker box details (schematic added 9/02) |
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11 Watt Audio Amplifier - A 10-W Design giving subjectively better results than
class B transistor amplifiers . (electronic design added 08/08/08) |
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11 Watt Power Amplifier - Simple Class A Amplifiers (added 4/02) |
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15dB UHF TV Antenna Booster - This is an UHF band TV antenna preamplifier circuit
With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first
stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second
stage is a base-common…(electronic design added 08/08/08) |
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16 Watt Amplifier - this circuit provides 16 watts of amplification. it is built
using two LM383 power audio amplifiers. use suitable heat sinks with the ic's.
….(diagram added 6/03) |
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18 Watt Audio Amplifier - Can be directly connected to CD players, tuners and tape
recorders. Do not exceed 23 + 23V supply. Q3 and Q4 must be mounted on heatsink. D1
must be in thermal contact with Q1. Quiescent current (best measured with an Avo-meter
in series with Q3 Emitter) is not....(electronic circuit added 6/07) |
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2 Watt 2.3 GHz RF Amplifier using a MRF2001 - (diagram added 6/03) |
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2 Watt Amplifier (red circuits) - This amplifier was designed to be self-contained
in a small loudspeaker box. It can be feed by Walkman, Mini-Disc, iPod and CD players,
computers and similar devices fitted with line or headphone output. Of course, in most
cases you will have to make two boxes to obtain stereo....(circuit added 9/04) |
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2.3 GHz Power Amplifiers - Note: quality of text is poor. (added 4/05) |
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20 Watt Audio Amplifier (Aaron Cake) - Simple stereo amplifier based on TDA1554...
(circuit design added 06/06) |
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20 Watt Class a Power Amplifier - (schematic / circuit design added 9/02) |
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20 Watt GaAs-FET Power on 2.3 GHz - (diagram added 6/03) |
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20 Watt Stereo Amplifier (Randy Linscott) - This circuit is very basic to build
and puts out great power for your car or home. Keep all leads as short as
possible….(added 08/08/08) |
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20 Watt/ Channel Stereo Power Amplifier - Based on the versatile LM1875 from
National Semiconductor (circuit added 2/07) |
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20 Watt/Channel Stereo Power Amplifier - Based on the versatile LM1875 from
National Semiconductor (circuit / schematic added 9/02) |
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200 Watt Amplifier - (electronic schematic / circuit added 4/02) |
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200W ATX PC Power Supply - This power supply has ATX design and 200W performance.
I was drawed diagram, when I repaired this power supply. This power supply circuit
uses chip TL494. Similar circuit is used in the most power supplies with output power
about 200W....(electronic design added 6/07) |
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200W audio Amplifier - ….(circuit design added 08/08) |
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20dB VHF Amplifier - The amplifier is a circuit of high frequency RF with
distinguishable materials. The amplifier as circuit strengthens the tendency of signal
with concrete aid, depending on the frequency of signal. If the frequency of signal is
included in the limits of spectrum of frequencies….(electronic schematic added 08/08) |
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20W Amplifier (Aaron Cake) - The 22 watt amp is easy to build, and very
inexpensive. The circuit can be used as a booster in a car audio system, an amp for
satellite speakers in a surround sound or home theater system, or as an amp for
computer speakers.....(electronic circuit added 4/05) |
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22 Watt Stereo Amplifier - The 22 watt amp is easy to build, and very inexpensive.
The circuit can be used as a booster in a car audio system, an amp for satellite
speakers in a surround sound or home theater system, or as an amp for computer
speakers. The circuit is quite compact and uses only about 60 watts.….(electronic
schematic added 03/08) |
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22W Stereo Amplifier - This circuit is very basic to build and puts out great
power for your car or home. Keep all leads as short as possible….(design added 03/08) |
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25 Watt MosFet Audio Amplifier - High Quality simple unit. No need for a
Preamplifier (added 9/04) |
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2W Amplifier - Amplifier operates in Class AB mode; single 470R preset resistor
controls quiescent current flowing through BD139/140 complimentary output
transistors. Adjustment here, is a trade-off between low distortion and low quiescent
current. Typically, ... (added 2/07) |
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3 Transistor Audio Amp 50 Milliwatt - Here is a little audio amplifier similar to
what you might find in a small transistor radio. (added 4/02) |
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30 Watt Power Amplifier - Ultra-Low distortion30-Wattpower amp (added 4/02) |
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300W Subwoofer Power Amplifier - Please note that specification for this amp has
been upgradded , and it is now recommended for continuous high power into 4 Ohms, but
You will need to go to extremes with heatsink (fan cooling is highly recommended). It
was originally intended for "light"... (added 2/07) |
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4 Watt Amplifier - (diagram added 6/03) |
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50w Amplifier (Aaron Cake) - This is a handy, easy to build general purpose 50
watt amp. The amp has an input for a radio, TV, stereo or other line level device. It
also has a phono input for a record player, guitar, microphone….(electronic circuit
added 4/05) |
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50w Audio Power Amplifier - This simple audio power amplifier was originally
designed for a circuit board workshop, conducted by the OSU IEEE Student Group. At the
workshop, 20 participants each constructed this amplifier….(electronic circuit added
08/08/08) |
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6 Input Mixer (mitedu) - The mixer circuit below has 3 line inputs and 3 mic
inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones.
An ECM or condenser mic can also be used, but must have bias applied via a series
resistor. As with any mixer circuit, a slight loss is always introduced. The final
summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should
be around 200mV RMS....(schematic added 08/08/08) |
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60 Watt into 8 Ohms Power Amplifier - A simple amp to build, uses commonly
available parts and is stable and reliable (added 4/02) |
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60W Bass Amplifier - This design adopts a well established circuit topology for
the power amplifier, using a single-rail supply of about 60V and capacitor-coupling
for the speaker(s). The advantages for a guitar amplifier are the very simple
circuitry, even for comparatively high power outputs, and a certain built-in degree of
loudspeaker protection, due to capacitor C8, preventing the voltage supply to be
conveyed into loudspeakers in case of output transistors' failure. The preamp is
powered by the same 60V rails as the power amplifier, allowing to implement a
two-transistors gain-block capable of delivering about 20V RMS output. This provides a
very high input overload capability. ….(design added 11/08) |
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60W Class-A Power Amp - circuit is on last page. There is one amplifier
configuration that is universally accepted as the ideal for audio use: Class A
operation. Many early amplifiers operated in Class A, but….(circuit added 04/05/06) |
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60W Guitar Amplifier - This design adopts a well established circuit topology for
the power amplifier, using a single-rail supply of about 60V and
capacitor-coupling….(added 3/05) |
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60W MOSFET Amplifier - To celebrate the hundredth design posted to this website,
and to fulfil the requests of many correspondents wanting an amplifier more powerful
than the 25W MosFet, a 60, 90W High Quality power amplifier design is presented here.
Circuit topology…(design added 04/05/06) |
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60W Power Amplifier - This paper gives a practical example of the design of an
off-line switching power supply. Factors governing the choice of a discontinuous
flyback topology are discussed. The design uses a pulsed-width modulation (PWM)
control scheme implemented with a Unitrode UC3840 IC...(circuit added 04/05/06) |
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60W Power Amplifier (Jacint Chapo) - This is a simple and low cost 60W power
amplifier. The optimal supply voltage is around 50V, but this amp can work from 30 to
60V. The maximum input voltage is around 0.8, 1V. As you can see, in this design the
components have a big tolerance, so you can build it with almost any components that
you can find at home. The output power transistors can be any NPN types, but do not
use Darlington types. ….(design added 11/08) |
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65W HEXFET Power Amplifier - A medium power amplifier that is characterized by a
lot of good sound quality, but simultaneously is very simple in the construction. Him
uses, enough time in my active loudspeakers. In his output stage exist the very good
FET transistors, technology HEXFET, ...(added 07/07/07) |
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68-Watt Power Amplifier - Experimential power amplifier using low-cost LM3886
monolithic power amp IC. Suitable for sound reinforcement in small to mid-sized clubs.
Includes parts and circuit for 28Vdc bipolar power supply. (circuit design added
10/06) |
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6V Ultra-Bright LED Chaser - This is a spectacular but completely useless project.
It lights Ultra-Bright LEDs in a sequence and each LED flashes brightly very briefly.
The LEDs light-up going around and around since they are mounted in a circle (on a
CD), then they pause ...(electronic design added 6/07) |
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8 Watt Amplifier - (diagram added 6/03) |
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8 watt audio amp (Aaron Cake) - Here is the schematic for an 8 watt audio amp.
This amp can be used as a simple booster, the heart of a more complicated amplifier or
used as a guitar amp. (diagram added 08/08/08) |
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80 Watt Amplifier #1 - Uses LM12 chip (app note added 4/02) |
