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Distance Sensing-devices for wireless distance & position Determination - Since the early seventies we did build sonar devices to control our self made analog electronic music synthesizers. In those years, simple to use transducers were not readily available on the electronic component market and so, we had to make our own, based on designs used for underwater hydrophones. (Quarz crystals, inductive devices, self made condensor microphones etc...) . Although the focus of our research later on became doppler based sonar and radar movement detection and gesture analysis __ Designed by Dr.Godfried-Willem Raes Distortion effects using an LM386 Audio Amplifier IC - A few months ago, Aron Nelson released the Smash Drive. The circuit ingeniously used an LM386 audio power amp chip to produce great distortion sounds. Aron based his work on that of Tim Escobedo. Tim's Stupidity Box was another great sounding unit and beautifully simplistic. The Smokey Amp by Bruce Zinky was another design that used a 386 for some great sounds. __ Contact: holler @ runoffgroove.Com
DIY Bias Probe - DIY Bias Probe __ Designed by Guitar Effect RC Keen
Double D - Two channels of buxom distortion. __ Contact: holler @ runoffgroove.Com
DSP Musicolour Light Show; Pt.2 - In last month's first part, we described the circuit operation of the DSP Musicolour. In this instalment, we guide you through the construction. The operation of the firmware and troubleshooting tips will be described next month. In this issue there are also notes and errata for the schematic published last month.__ SiliconChip
DSP Musicolour Light Show; Pt.3 - In last month's article, we detailed the construction of the DSP Musicolour. In this month's article, we guide you through the final testing of the DSP Musicolour and give troubleshooting tips. We also explain the operation of the firmware in more detail as well as discussing possible accessories.__ SiliconChip
DSP Musicolour Pt.1 - This DSP Musicolour accepts audio input signals and drives coloured lights "in tune" with the music. Its four output channels respond to different audio frequency bands and the brightness of the lights is in direct proportion to the amplitude of the frequency components. A dot-matrix LED menu display is featured on the front panel and this also functions as a spectrum analyser or VU meter.__ SiliconChip
DSP Musicolour Pt.4 - With a small and low-cost add-on PC board, the DSP Musicolour can be operated via an infrared remote control - very handy if you want to use it in hard-to-reach places.__ SiliconChip
Dual Analogue Frequency Shifter - An audio effects frequency shifter similar to the famous Bode/Moog design from the 1970s. __ Designed by Henry
Dual parallel buffered effect loops with blend control. Schematic & perfboard/PCB layouts - The Splitter-Blend provides two buffered parallel effects loops with a Blend control. Also, a phase polarity switch is included to allow phase matching of the effect loops. Possible uses are blending two sets of effects placed in the loops, a signal splitter, a simple mixer, or to blend an effect with the dry signal. The phase inverter can be used for interesting results when mixing dry and effected signal. __ Contact: holler @ runoffgroove.Com
Eight-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. __ Designed by Aaron Cake
Electric Guitar Preamplifier - This is a circuit for a guitar preamplifier that can capture mechanical vibrations (any standard guitar pickup) and then convert them into an electrical signal. The signal is then amplified by an audio amplifier. __ Electronics Projects for You
ElectricPickup - I have an unused 900 MHz antenna sticking out of my chimney that has an ungrounded vertical element. I replaced the 12 inch element with a two yard aluminum rod (see photo) . The antenna isonly 75 feet from the power lines so I didn't have much hope for this antenna to work. The lead-in coax is long so its capacitance (about 1, 500 pF) forms a voltage divider with the capacitance of the antenna so the signal is significantly __ Contact: Charles Wenzel of Wenzel Associates, Inc.
Electronic Canary Sound Effects - An electronic version of a chirping canary. May be used as an alarm, a sound effects generator or perhaps a replacement doorbell __ Designed by Andy Collison
Electronic Church Bell Controller - This circuit is a church bell controller. Basic component is an ATmega32 microcontroller. At the circuit 2 24LC32 eeprom memories is being used, the 1st for internal standard melodies and the 2nd one is for user's compositions. This feature will be provided in the future __ Designed by Antonis Pontikakis © 03.10.2007
Electronic Metronome - A metronome is used by musicians for practice in maintaining a consistent tempo, or rubato, around a fixed beat. This circuit produces a regular beat at the rate of 40 to...__ Electronics Projects for You
Electronic Metronome - A Universal Power supply based on the L200 regulator, which includes an outboard pass transistor to boost output currents up to 4 amps. __ Designed by Volker Jeschkeit
Electronic Metronome with 555 - This metronome circuit is not modern but is cheap and reliable. The well known 555 is connected as an astable multivibratos in this electronic metronome and produces a regular train of impulses which can be heard with a speaker. The metronome frequency can be adjusted with P1. The power supply is a 9V battery and if you use a __ Designed by Popescu Marian
Emulate Mechanical Metronome - 08/19/99 EDN-Design Ideas - The circuit in Figure 1 produces timing signals with a sound like that of a mechanical metronome. IC 1 is a 555 timer that oscillates at approximately 3200 Hz. The two 3-kW resistors and the 0.047-µF capacitor set the frequency. IC 2 divIdeas the frequency of IC 1 's output by 2. IC 2 produces a square wave with an exact 50% duty cycle. Design by Jim Kocsis
Faraday’s Guitar - Experimenting with the fundamentals of electrical and electronics is always interesting. Presented here is an electronic circuit that demonstrates Faraday’s law of electromagnetic induction and gives musical output. The law talks...__ Electronics Projects for You
Faux-phaser with LFO & manual (wah pedal) Modes. Schematic & & PCB layout. - The original Phozer was a sound idea, but was hindered by its mashed-up development. The circuit didn't really exceed the sum of its parts, namely Tim Escobedo's Idiot Wah and the LFO from the EA Tremolo. The faux phase shifting effect was reasonably convincing at faster speeds, but the LFO failed to produce a true sweep at slower speeds. Rather than ramp up and down, at slow speeds the LFO simply spent more time in the darker heel-down position between quick pulses of toe-down mode. Also, we saw that using op-amps rather than discrete components would probably allow for a more complex effect with fewer parts. __ Contact: holler @ runoffgroove.Com
Fender Princeton adapted for use as a distortion stompbox - One of the often overlooked Fender amps is the tweed-era Princeton. They are excellent guitar amps, especially for blues playing. The major drawback was the 4.5 watt output wasn't enough to keep up with a band. Again, using the technique pioneered by Doug Hammond, we decided to try to capture some of the sound of this little amp in pedal form so it can be used with a band. __ Contact: holler @ runoffgroove.Com
Fetzer Valve - In the two years since the Fetzer Valve was first published in the midst of our adaptation of tube amps for use as distortion pedals, the circuit has enjoyed popularity as a standalone booster and as a building block in larger circuits. While the circuit has its merits, we decided to further explore it to determine if it was a truly faithful solid-state version of the familiar input stage used in many tube amps. __ Contact: holler @ runoffgroove.Com
Five band graphic equalizer - This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems. The BA3812L is a five-point graphic equalizer that has all the required functions integrated onto one IC. The IC is comprised of the five tone control circuits and input and output buffer amplifiers. The BA3812L features low distortion, .
Flipster - When one thinks of classic bass amps, the brand name "Ampeg" often comes to mind. Their SVT models were very popular and still are today. Slightly less known Ampeg combo-type models were also made, called "Portaflex" amps. In "travel" form, these appeared to be simple closed back speaker cabs with a pair of chrome latches on either side of the top panel. When one released the latches, the top panel could be removed and flipped over to reveal a tube head unit. One simply plugged in the attached speaker cable and the amp was ready to go. The unique design led to the nickname of "Flip Tops." __ Contact: holler @ runoffgroove.Com
Foldback Loudspeaker System for Musicians - It uses readily available drivers and can be built using basic hand and power tools.__ SiliconChip
Fuzz-box - All-FET design; Valve-like distortion behavior __ Contact: Flavio Dellepiane, fladello @ tin.it
FuzzniKator Push-Pull Tube Distortion/Preamp - improved tube distortion project __ Designed by G. Forrest Cook
Fuzzy Firebottle Guitar Distortion Pedal - single-ended tube distortion __ Designed by G. Forrest Cook |
