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Crossed from: Inside Circuits | Clicks: 18630 | Votes: 2 | Comments: 0 | Rating: 7.5 | Rank: 2
Sounds from the IC IT82207
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This circuit is able to take you to the world of the Wild West. For this it uses the integrated 18-pin IT82207 (IC1) of Holtek, which literally takes care of everything. You have to do is add a few accessories, including a loudspeaker and six selector switches. ..
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Crossed from: Inside Circuits | Clicks: 2101 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 2
Low energy consumption audio signal generator
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On those occasions when we want to see if an amp works, the best tool we can use is a source of acoustic signal with a frequency around the 1 kHz. These characteristics can be merely 'tolerated', because in cases of rapid tests rarely consider whether the amplifier is quality. We need only find that it works So, the deformation of the generator is a parameter without
irrelevant, giving way to another more important: consumption. The design of the circuit discussed below has been done so that the generator is to fulfill the above requirements. ..
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Crossed from: Vacuum Tubes - Valves | Clicks: 14128 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
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| Clicks: 8203 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Super audio Reverb
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Blue VALUES replaced by values in RED. Blue COMPONENTS removed from circuit. Red components added to circuit...
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| Clicks: 2278 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
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Crossed from: Vacuum Tubes - Valves | Clicks: 14402 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
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| Clicks: 3234 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Trainwreck Blues tube amplifier for Guitars
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This revision reduced the signal level and
treble response in the preamp for a smoother
sound in both cathode and fixed bias modes.
The power supply was also revised for lower
B+ voltages to the EL84 plates. "This amp was built on the chassis of an
Electar Tube 30 amp, which is advertised
as a 20 watt Class A amp...
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| Clicks: 7263 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Tube circuits for Guitar Amplifiers
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The IRF820 MOSFET has a voltage rating of 500v, it should work well in preamp stages of most tube amps. The 100 ohm resistor is there to suppress H.F. oscillations. If IRF820 is physically close to the 12AX7 plate, you probably won't need it. You can see how the MOSFET is equivalent to a triode: Source = Cathode; Gate = Grid; Drain = Platel You cannot use the MOSFET as a directreplacement for a typical tube gain stage. The MOSFET will not "self bias" like a typical cathode-biased tube stage.The MOSFET is an "enhancement device" while a triode is a "depletion" device. l In this circuit, it is not necessary to use a heatsink on the IRF820. You can if you want..
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| Clicks: 14086 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Electronic Metronome with LED
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The LED Metronome is a modern interpretation of a classic device which is a staple of music teachers, students and composers everywhere. This circuit uses 12 LEDs to simulate the sweeping motion of the pendulum and a speaker with a simple amplifier to generate a tick as the LEDs at the end of the arc are struck. It is adjustable from about 40 BPM to just over 200 BPM. When made in a Lexan or Plexiglass case it can add a fun ultra-modern touch to music practice (though most music teachers agree that you should never rely on a metronome to keep your beat)...
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| Clicks: 17473 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Fuzz Guitar Effect circuit
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Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well. The circuit is so compact that it can be built into guitars or amps that do not have built in fuzz to add that capability to the instrument. The circuit does not use much battery power, so a standard alkaline battery will last many years even with daily use. You can use any input/output jacks you want, but the standard for musical instruments such as guitars is a mono 1/4" headphone plug and jack...
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| Clicks: 769 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Guitar phaser effect
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This circuit is a phaser circuit, as used in guitar foot-pedal effects. It used 11 sections of op-amp such as LM324 but others will do. The whole circuit works of a dual rail supply: +/- 9v. The 0v rail is indicated by a chassis sign. Make sure these supplies are well decoupled. There is a spare section of one of the IC's which you could used to derive a center tap from an 18v supply. The circuit works by means of an LED illuminating six cadmium sulphide photo sensitive resistors or LDRs: these six should be arranged in a circle around the LED so that they all get illuminated approximately the same. Exact matching does not matter too much. The whole photo assembly should, of course, be shielded from external lighting...
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| Clicks: 11588 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
MIDI Clock
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This circuit generates MIDI clocks and start/stop messages...
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| Clicks: 2152 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
MIDI Program Changer
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This circuit sends MIDI program changes. It's useful as a guitar pedalboard remote...
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| Clicks: 6384 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Midi Trigger Sequencer
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Add this to the above circuit to get a programmable trigger sequencer. Includes an optional audio modulation stage...
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| Clicks: 9925 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
MIDI to Sync24 Convertor
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This self-powered circuit converts MIDI clocks to DIN sync24. This type of clock is used on old Roland gear and provides a 24 pulses per quarter note clock and a start/stop signal...
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