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Speaker Box Audio Amps – Circuit Schematic
Speaker Box Audio Amps
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Bass-treble tone control circuits – Circuit Schematic
Bass-treble tone control circuits
Low distortion bass and treble control for amplifier. Circuit diagram. Electronics projectt.....
High Quality Intercoms – Circuit Schematic
High Quality Intercoms
This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) rela...
Ultrasonic Dog Whistles – Circuit Schematic
Ultrasonic Dog Whistles
Many commercial pest repellers operate in the range of 30 to 50 kHz. My aim was, however, to design a slightly different and somewhat more powerful audio freque...
Sound Level Meters – Circuit Schematic
Sound Level Meters
This nifty sound level meter is a perfect one chip replacement for the standard analog meters. It is completely solid state and will never wear out. The whole c...
Speaker Microphone circuit diagrams – Circuit Schematic
Speaker Microphone circuit diagrams
This circuits allows you to use a cheap loudspeaker as a microphone. Sound waves reaching the speaker cone cause fluctuations in the voice coil. The voice coil ...
FET Audio Mixers – Circuit Schematic
FET Audio Mixers
Small simple audio mixer with a few components around one FET transistor (2N3819).....
Sound Effects Generators – Circuit Schematic
Sound Effects Generators
The IC produces all the sound effects, the output at Pin 3 being amplified by the transistor. A 64 ohm loudspeaker can be substituted in place of the 56 ohm res...
Three-Level Audio Power Indicators – Circuit Schematic
Three-Level Audio Power Indicators
This circuit indicates audio output power via three LEDs. Nice addon to your amplifier.....
Sound Operated Switchs – Circuit Schematic
Sound Operated Switchs
This sensitive sound operated switch can be used with a dynamic microphone insert as above, or be used with an electret (ECM) microphone. If an ECM is used then...
Portable Mixers – Circuit Schematic
Portable Mixers
Portable Mixer. High-quality modular design. 9V Battery powered - Very low current drawing. Preamp, tone control, mixer - all in one. Electronics project. Circu...
Precision Metronome and Pitch generators – Circuit Schematic
Precision Metronome and Pitch generators
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Sound Level Indicators – Circuit Schematic
Sound Level Indicators
This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The circuit is unique because it has an additional range of 20dB provide...
Cuckoo sound Generators – Circuit Schematic
Cuckoo sound Generators
This circuit generates a two-tone effect very much alike the cuckoo sound. It can be used for door-bells or other purposes thanks to a built-in audio amplifier ...
One-IC two-tones Sirens – Circuit Schematic
One-IC two-tones Sirens
This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games...
Electronic Canary – Circuit Schematic
Electronic Canary
An electronic version of a chirping canary. May be used as an alarm, a sound effects generator or perhaps a replacement doorbell.....
Line Level Stereo Output on Genesis 1 – Circuit Schematic
Line Level Stereo Output on Genesis 1
I am planning on doing an s-video and rca jack mod on my Genesis. The mods I see done seem to all use the headphone jack as the source of the stereo sound. Is t...
Microphone preamplifier with audio compressor – Circuit Schematic
Microphone preamplifier with audio compressor
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1W guitar amplifier – Circuit Schematic
1W guitar amplifier
An alternative to the infamous ROG `s Ruby amp. As you see it shares with the Ruby the same topology: a buffer and a chip amp. It uses a JFET buffer with a MPF1...
make your own portable Guitar Amp – Circuit Schematic
make your own portable Guitar Amp
The guitar is a wonderful musical instrument which is capable of providing both melody and rhythm. However, every guitar player would have experienced the probl...