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doorbell of two tones – Circuit Schematic
doorbell of two tones
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preamp circuit 3 – Circuit Schematic
preamp circuit 3
During my Digital Projects Lab, the professor recommended I find a way to include more circuit level work into my project. To fulfill this, I decided to build a...
Audio Oscillator with Frequency Counter – Circuit Schematic
Audio Oscillator with Frequency Counter
I am continuing to add DIY equipment to my home workshop. Audio oscillator is a very useful tool that is needed when we test audio projects. I already have a si...
PLL Hum Cancellation Circuit – Circuit Schematic
PLL Hum Cancellation Circuit
This report describes the operation and adjustment of a Phase Locked Loop hum cancellation circuit that can be used to reduce the residual hum from any amplifie...
Groovewatt a DIY Vacuum Tube (Valve) RIAA Phono Preamplifier Project – Circuit Schematic
Groovewatt a DIY Vacuum Tube (Valve) RIAA Phono Preamplifier Project
This is a project that I always wanted to do, but managed to put off for a long time. It has been over a year in the doing. Partly because there are so many goo...
6418 Tube RIAA Phono Preamplifier – Circuit Schematic
6418 Tube RIAA Phono Preamplifier
Last year I built and reviewed the low cost Oatley Electronics K272 Tube Stereo Headphone Amplifier Kit. In conversation with Oatley Electronics (located in New...
Le Pacific JFET Phono Preamp for MM and MC Cartridges – Circuit Schematic
Le Pacific JFET Phono Preamp for MM and MC Cartridges
This is my DIY build of the Boozhound Laboratories JFET Phono Preampifier, but on a stripboard. The BHL preamp is based heavily on the Le Pacific RIAA phono pre...
7025 ECC803S 12AX7A Tube RIAA Phono Preamplifier Schematic – Circuit Schematic
7025 ECC803S 12AX7A Tube RIAA Phono Preamplifier Schematic
This two-stage audio preamplifier is intended for use with high-fidelity magnetic phonograph pickups. The overall gain of the circuit is about 150. The circuit ...
6DJ8 Tube RIAA Phono and Line Preamplifier Schematic – Circuit Schematic
6DJ8 Tube RIAA Phono and Line Preamplifier Schematic
6DJ8 Tube RIAA Phono and Line Preamplifier Schematic. The HT power supply uses tube rectification and regulation...
DIY Moving Magnet (MM) RIAA Phono Preamplifier Kit – Circuit Schematic
DIY Moving Magnet (MM) RIAA Phono Preamplifier Kit
Mark builds and tests the DIY Moving Magnet (MM) Phono Preamplifier Kit that was featured in Silicon Chip Magazine, August 2006. The kit comes complete with eve...
Crossfeed Audio – Circuit Schematic
Crossfeed Audio
Here`s a simple and fun project / circuit in case you would like to try crossfeed. It`s based on a Linkwitz crossfeed. There is a big difference in crosstalk an...
All 7-pin Tube Based Phonostage – Circuit Schematic
All 7-pin Tube Based Phonostage
This began as a simple project to build a cheap phono stage for a very old turntable with a cheap cartridge out of parts on hand. However, it turned into a pret...
Simple Phono Preamplifier – Circuit Schematic
Simple Phono Preamplifier
This is a Simple Phono Preamplifier Circuit Diagram. In recent years, following CD`s introduction, vinyl recordings are almost disappeared. Nevertheless, a phon...
Reliable 6 Watt Hi Fi Audio Amplifier Using TDA2613 – Circuit Schematic
Reliable 6 Watt Hi Fi Audio Amplifier Using TDA2613
A 6 watt audio amplifier circuit using TDA2613 is shown here. TDA2613 is an integrated Hi-Fi audio amplifier IC from Philips Semiconductors. The IC is switch ON...
Signal Tracer – Circuit Schematic
Signal Tracer
The main part of this circuit is the LM386 amplifier chip. It also uses a transistor input to buffer the input signal and provide extra gain for the LM386. The ...
Crossover For Subwoofer – Circuit Schematic
Crossover For Subwoofer
The crossover network is intended for use when an existing audio installation is to be extended by the addition of a subwoofer. Often, this additional loudspeak...
Sounds From The Old West – Circuit Schematic
Sounds From The Old West
This circuit shows how far integration can be taken: IC1, a Type HT82207 from Holtek does virtually everything. Only a (small) loudspeaker and the necessary sel...
Nashville Tele Wiring – Circuit Schematic
Nashville Tele Wiring
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Mono to Stereo Audio Signal Circuit Converter – Circuit Schematic
Mono to Stereo Audio Signal Circuit Converter
This circuit is used to convert a mono audio signal into a stereo signal that can be panned between the left and right channel by a 0-10V control signal, it is ...
Mini Voice Operated RelayCircuit – Circuit Schematic
Mini Voice Operated RelayCircuit
This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect and disconnect) ...