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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) |
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