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300 Watt Subwoofer Power Amplifier: (electronic circuit added 7/03) |
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3-Band Equalizer: Using a single
op-amp this easy to make equalizer offers three ranges, low frequency, mid frequency, and high. With component values shown re is approximately +/-20dB of boost or cut at frequencies of 50Hz,
1kHz and 10kHz. Supply voltage may be anything from 6 to 30 Volts. Maximum boost 20dB is only realized with maximum supply voltage. (added 4/05) |
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3kHz Filter and Audio
Amp: (schematic / circuit added 9/06) |
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4 Channel Stereo Audio Selector:
Channels are digitally switched with CD4066. (circuit added 8/06) |
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4 Watt Amplifier: (circuit / schematic added
6/03) |
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5 Band Graphic Equalizer using a
Single IC/Chip: This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems. BA3812L is a five-point graphic equalizer
that has all required functions integrated onto one IC. IC is comprised of five tone control circuits and input and output buffer Amplifiers.…. (added 10/05) |
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50 Watt Amplifier: (circuit added 7/02) |
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50 Watt Amplifier: (electronic design added
6/07) |
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55 Watt Originally 75W Power Amplifier: (circuit / schematic added
6/03) |
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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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60 Watt Power Amplifier : (schematic added 9/02) |
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60-100W Hi-Fi Power Amplifier: Excellent performance,
easy to build and very relaible amplifier. (circuit added 8/06) |
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60W Bass Amplifier: Low-cut and Bass controls. Output power: 40W on 8
Ohm and 60W on 4 Ohm loads (added 3/05) |
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60W Guitar Amplifier: (electronic schematic /
circuit added 2/05) |
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60W Guitar Amplifier: Bass, Treble, Harmonic modifier and Brightness
controls. Output power: 40W on 8 Ohm and 60W on 4 Ohm loads (added 3/05) |
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70W Class AB Hi-Fi Amplifier
: This project
considers development of a 70W Hi-Fi Power Amplifier for use as part of a Hi-Fi separates music system. The design is a fairly simple circuit topology, which is easy to understand and
author believes that finished result sounds very nice indeed. The web posting is developed from an original design document available in pdf below. The detailed design issues are
discussed in pdf, while this posting discusses more practical issues involved in producing amp. (added
7/08) |
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78 RPM and RIAA Phono Equaliser: Multi Standard 78 RPM
and RIAA Phono Equaliser handles all "standards" (added 6/07) |
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8 Watt Amplifier #2: (circuit
added 10/06) |
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8 Watt Amplifier: (circuit / schematic added
6/03) |
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8 Watt Amplifier: (electronic design added
6/07) |
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8 watt audio amp: 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 6/07) |
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8 x 8 Audio Video Switch: (electronic Circuit added
03/06) |
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80 Watt Amplifier #2: Uses LM12 chip (app note
added 4/02) |
