Published:2012/11/21 21:14:00 Author:muriel | Keyword: 4 Band , Double, Tuned Preselector
The circuit requires an RF input which can be from a longwire or a loop antenna. The Preamplifier has a range from 550kHz (Medium Wave) up to 30 MHz in the SW band. The input Switch S1, applies voltage to a set of relays which switch in the appropriate coils.The preamplifier is double tuned on the input having two IFT coils for each RF range, input applied to G1 of a double gate MOSFET. Gain control is applied to G2 and the output is taken from the DGMOSFET drain terminal. Click here for a picture of a MW loop. Click hereto view a finished picture of this project. (View)
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Published:2012/11/21 21:13:00 Author:muriel | Keyword: Q- Multiplying, Loop Antenna
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Published:2012/11/21 21:13:00 Author:muriel | Keyword: Medium Wave , Active Antenna
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Published:2012/11/21 21:12:00 Author:muriel | Keyword: AM Receiver
This is a compact three transistor, TRF receiver with fixed feedback. It is similar in principle to the ZN414 which is now replaced by the MK484. The design is simple and sensitivity and selectivity of the receiver are good. (View)
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Published:2012/11/21 21:10:00 Author:muriel | Keyword: Guitar Preamp, Tone Controls
An electric guitar pre-amp with tone controls using dual supplies. The guitar pickup is high impedance, therefore good quality screened cable must be used between guitar pickup and the preamp. (View)
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Published:2012/11/21 21:09:00 Author:muriel | Keyword: Sound , Light Circuit
An experimental circuit that converts light to sound. The circuit uses a solar cell as the input transducer, blocks the DC produced by the cell, but amplifies the light received by the cell. Sunlight, moonlight, torchlight all produce sound which is amplified by this circuit. (View)
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Published:2012/11/21 21:09:00 Author:muriel | Keyword: Guitar Preamp
A pre-amplifier for electric guitars. The guitar pickup is high impedance, therefore good quality screened cable must be used between guitar pickup and the preamp. (View)
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Published:2012/11/21 21:07:00 Author:muriel | Keyword: Guitar, Reverb, Effect Version
This is my second-generation guitar reverb circuit. The fidelity is much improved over the earlier design, it is suitable for use as a front-end to a guitar amplifier. This circuit features clipping indicators on the preamp and reverb recovery stages, allowing for the optimal gain settings. (View)
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Published:2012/11/21 21:01:00 Author:muriel | Keyword: Guitar Fuzz Effect
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Published:2012/11/21 21:00:00 Author:muriel | Keyword: Simple Color Organ
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Published:2012/11/21 21:00:00 Author:muriel | Keyword: Mini Metronome
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Published:2012/11/21 20:59:00 Author:muriel | Keyword: Electronic Siren
An electronic siren made from discrete components. A push button switch is used to create the sound, which rises in pitch when the switch is pressed, and falls in pitch when the switch is released. (View)
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Published:2012/11/21 20:59:00 Author:muriel | Keyword: Sound , Effects Generator 2
This circuit uses the Holtek HT2884 IC to produce 8 different sound effects. (View)
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Published:2012/11/21 20:58:00 Author:muriel | Keyword: Sound, Effects Generator
This circuit uses a UM3561 IC to produce four different sound effects. (View)
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Published:2012/11/21 20:55:00 Author:muriel | Keyword: Metronome Circuit
A metronome circuit based on a simple astable. The output sound is distorted to emphasize the pulses. (View)
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Published:2012/11/21 2:16:00 Author:muriel | Keyword: Electronic Canary
An electronic version of a chirping canary. May be used as an alarm, a sound effects generator or perhaps a replacement doorbell. (View)
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Published:2012/11/21 2:15:00 Author:muriel | Keyword: PWM , Motor Control
This is a circuit to control motor speed uses pulse width modulation (PWM). The PWM signal is generated by the ubiquitous 555 timer and output current amplified by a power transistor. (View)
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Published:2012/11/21 2:14:00 Author:muriel | Keyword: Internet, Streaming, Recording Aid
This small and handy device acts as an interface between your computer sound card and is a complete system for listening to streaming audio from the many thousands of Internet Radio Stations. (View)
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Published:2012/11/21 2:13:00 Author:muriel | Keyword: Infra Red, Extender Mark, 4A, 36KHz
An Infra Red wired Repeater circuit to control appliances from a remote location. (View)
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Published:2012/11/21 2:12:00 Author:muriel | Keyword: Constant Motor , Speed Control
A simple op-amp feedback circuit designed to regulate the speed of a DC motor. (View)
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