Hobby Hound

Practical Electronics Learning with DIY. Practical Experiments forge the book, college or web learning into a Skill.

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Friday, August 07, 2020

GainClone Chipamp Audio Amplifier

Gainclone or chipamp is a type of audio amplifier made by do-it-yourselfers, or individuals interested in DIY audio. It is a design based on high-power integrated circuits, particularly the National Semiconductor Overture series.

GainClone Chipamp Audio Amplifier

The Gainclone is probably the most commonly built and well-known amplifier project amongst hobbyists. It is simple to build and involves only a few readily accessible, inexpensive parts. As an amplifier it is highly regarded by many in the DIY community.

GainClone Chipamp Audio Amplifier

GainClone Amplifier Rod Elliott (ESP)

"The amp is based on the Project 19 PCB, so uses a pair of LM3876 (or LM3886) power opamps, run from a ±35V supply. ...........The power supply is conventional in almost all respects. I used a 160VA transformer, a 400V 35A bridge rectifier, and a total of 20,000uF per supply rail - 4 x 10,000uF caps in all."

Cornfield Electronics - Mitch Altman

Mitch Altman, president and founder, invented the company's hit product TV-B-Gone® and turned the product into an international success practically overnight.

Cornfield Electronics - Mitch Altman

Solder your ArduTouch kit together, and it works! You can make way wonderful music, sound, and noise.

Cornfield Electronics - Mitch Altman

Use the ArduTouch Library or hack the existing sketches to create your own cool synthesizers.
The documentation is getting good enough to learn how to use Digital Signal Processing (DSP) to make your own sounds for your own projects.

Cornfield Electronics, Inc.
1800 Market St. #123 San Francisco, CA 94102, USA

Recording Technology History

1877 - Edison made the first recording of a human voice ("Mary had a little lamb") on the first tinfoil cylinder phonograph Dec. 6 (the word "Halloo" may have been recorded in July on an early paper model derived from his 1876 telegraph repeater) and filed for an American patent

Dec. 24. John Kruesi built this first practical machine Dec. 1-6 from a sketch given to him by Edison that was made Nov. 29 (not on "Aug. 12" that Edison mistakenly wrote on another sketch in 1917).

Recording Technology History - https://www.aes.org/aeshc/

Edison Phonograph

When Kruesi heard Edison's first words Dec. 6, he exclaimed "Gott in Himmel!" (but these words for "God in Heaven" were not recorded and thus have been forgotten). Others before Edison had tried to record sound, but Edison and his tinfoil phonograph were the first to succeed.

History of sound recording

The phonograph expanded on the principles of the phonautograph. Perfected by Thomas Edison in 1878, the phonograph was a device with a cylinder covered with an impressionable material such as tin foil, lead, or wax on which a stylus etched grooves.

Friday, July 10, 2020

DIY Radio Control Electronic Projects

This project, called "Simple-Timer" is a programmable Timer and electronic switch with an integrated LiPo Battery Monitor that is based around a PIC microcontroller.

Simple-Timer

The "Simple-Timer" includes a fairly accurate timer that is programmable (via pushbutton) by the user and can be programmed to time a 5, 10, 15, 20,25 or 30 minute event. When the timer/switch is enabled (tap small pushbutton), the onboard LED indicates the output is active by lighting solid (the circuit also outputs the same voltage as your supply/battery voltage using a PN2222 NPN transistor or a high current MOSFET).

Tom's Home Automation with X-10 Schematics Collection

    Electronix Express - For Schools and Industry

    Distributor of electronic components, test equipment and tools. Custom electronics kitting and value-added services. -  https://www.elexp.com/

    Electronix Express - For Schools and Industry

    Some of the products they supply include Anti Static Products, Toolkits, Soldering related, Inductors, Logic Probes and Pulsers.

    A Benchtop Multimeter,  4 ¾ digit, 40,000 count true RMS AC with Built-in USB & RS232 Interfaces.

    Bench Digital Multimeter DM422B

    Bench Digital Multimeter DM422B

    Other features -• Data save and recall with software, Triple display, (main, sub-left, sub-right), 40 segment bar graph display, duty cycle, Temperature function.....

    True RMS, USB & RS232 Model

    Electronix Express
    900 Hart Street Rahway, NJ 07065, USA

    Monday, July 06, 2020

    Makerbot - 3D Mechanical Prototype Synthesis

    The basic setup you'll need to build a plastic extruding CupCake CNC machine. from Bre Pettis
    Makerbot - 3D Mechanical Prototype Synthesis. https://www.makerbot.com/

    Makerbot is an open source robot that helps people make robots that make things.

    Makerbot - 3D Mechanical Prototype Synthesis

    "The only fear is that it can Replicate itself" -   ....When i had posted first..

    MakerBot Industries is a Brooklyn, New York-based company founded in January 2009 by Bre Pettis, Adam Mayer, and Zach "Hoeken" Smith producing 3D printers. MakerBot builds on the early progress of the RepRap Project. - 2013 updated

    Thursday, May 14, 2020

    Amplifier.cd - measuring instruments - audio

    The Content consists of theory, test, analog technique and measuring instruments for amplifiers, electronics and Hifi. by Ralf Richard Ohmberger

    Amplifier.cd - measuring instruments - audio

    Amplifier.cd - measuring instruments - audio

    A Tutorial describes fundamental ideas of electro-technology and the general amplifier and audio technology. The test equipment gallery shows measuring instruments - older, historical and partly new.

    Obsolete Test Equipment Gallery

    The gallery shows measuring technique, with which electronics are developed. Some are special and classic devices, which are still in use and some already represent a historical value. Many of these devices have special functions, which are very popular. The side does not intend to show newest test equipment from the portfolio of the manufacturers (some devices excluded).

    Saturday, May 09, 2020

    One Watt Mains LED Lamp or Tubelight

    Lots if Light on One Watt, yes this works, but should be built by those experienced in High Voltage usage and Knowledge of insulation techniques.

    Home Made Circuits.

    This has to be encapsulated in a insulated fire retardant plastic enclosure. You can change the values around what is indicated to experiment with types of White LED available.

    One Watt Mains LED Lamp or Tubelight

    This project is not for Youngsters or those who are still learning. High Voltage can cause injury and can be fatal too, when used or applied without experience, training or supervision.