Science-DIY (Page 2)

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

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.

Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles. See also the Science Blog, – Creator – Simon Field

Science Toys – Edutainment at Home

This Website is a valuable resource for students to learn basics and get interested in electronics and computers – delabs

Science Toys - Edutainment at Home


Electromagnetism: – An electric motor in 10 minutes

The motor is simply a battery, a magnet, and a small coil of wire you make yourself. There is a secret to making it (which I will of course share with you) which is at the same time clever and delightfully simple.

Other Projects – Fun with High Voltage, A 10 minute railgun, A 30 second motor.

Radio: A quick and simple radio

The reason a crystal radio does not need any batteries is the amazing capabilities of the human ear. The ear is extremely sensitive to very faint sounds. The crystal radio uses only the energy of the radio waves sent by radio transmitters.

Others are Building a radio in 10 minutes, Build a portable crystal radio, A radio out of household items, A simple AM transmitter, The Three-Penny Radio.

Computers and Electronics: A Computer Controlled Transmitter

In this project we will build a very simple radio transmitter that you attach to a serial port on your computer. The computer then runs a free program that converts words you type into radio signals that are decoded by another computer, using a cheap radio receiver, and a sound card.

More – A Free Space Laser Data Transmitter, Fun With Solderless Breadboards, A Simple 1 Watt Amplifier

Science Hobbyist – Amateur Science

Amateur Science, Cool Science, Gravity, Energy, Fusion, Tesla Coil Page. Neodymium Supermagnets, Science Toys. Significantly Worthwhile Books, Science Fair Ideas, Science Demos Articles, Experiments, Exhibits, Kids’ Science Projects, The Science Club.

Electronics Hobbyist

Projects for beginners, articles on electronics and electrical science, Tesla coils, electrostatic devices, and resource links for the hobbyist and educator.

William J Beaty

William J. Beaty
Research Engineer HV/Electrostatics specialist, Lecturer, Sci. Exhibit Designer, Textbook Consultant, Amateur Physicist

“In the past I’ve spent time as an embedded designer and software engineer, consulted on textbooks, lectured about electricity education, designed science projects for kids, and built physics exhibits while running the electronics dept. at the Museum of Science in Boston.”