|
DC Stabilized 1000uV/msec Op Amp - Adding a discrete output stage provides full control of the circuit operating currents thereby obtaining very fast ac signal response. The LT1001 is used to adjust the output dc offset to a very low value, uVs, not typical for very high speed amplifier designs. __ Linear Technology/Analog Devices App Note, Jun 21, 2011
Delay Unit for Surround Sound - The Mitsubishi M65830 Delay IC has been discontinued (for reasons beyond my comprehension) , and so far a suitable replacement device has not been found. This means (of course) that you will be unable to build this delay circuit. I have left the project in place as reference, and the overall connection schematic is still valid if (when?) a replacement for the M65830 is located. The project will be updated at that time. In the meantime, just ignore the delay circuit __ Designed by Rod Elliott ESP
Digital Volume Control - This circuit could be used for replacing your manual volume control in a stereo amplifier. In this circuit, push-to-on switch S1 controls the forward (volume increase) operation of both channels while a similar switch S2 controls __ Contact: IQ Technologies
Dip Oscillator for HF - amateur radio construction projects. __ Designed by Peter Parker VK3YE
Direct Injection Box for Musicians - Don't put up with hum. This versatile DI box converts an unbalanced input to a balanced output signal and includes a 3-band equaliser. __ SiliconChip
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 controlvery 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
Enhanced Linearity in the HELA-10 Power Amplifier - AN-60033 Application Note __ MiniCircuits.com
Exponential Voltage-to-Frequency Converter for Music Synthesizers - Logarithmic characteristic of BJT is used to provide an exponential control effect on V/F function. By using a multiple transistor array, a thermal stabilization circuit assures a constant operating point for the log function. __ Linear Technology/Analog Devices App Note, Jun 21, 2011
|
