Category: History

via HACKADAY: The 555 and How It Got That Way

There’s a certain minimum set of stuff the typical Hackaday reader is likely to have within arm’s reach any time he or she is in the shop. Soldering station? Probably. Oscilloscope? Maybe. Multimeter? Quite likely. But there’s one thing so basic, something without which countless numbers of projects would be much more difficult to complete, […]

via the ARRL: Remembering the Launch of Sputnik 1 — Earth’s First Artificial Satellite

October 4 marked the 61st anniversary of the launch by the Soviet Union of Sputnik 1, Earth’s first artificial satellite. The Soviets heralded the launch as a national triumph, and the space race between the USSR and the US began. Sputnik 1 was a 58-centimeter diameter, polished aluminum sphere sprouting four antennas and transmitting a 1 W […]

Hello Australia: 100 years ago, the first direct wireless message

“Send reinforcements, we are going to advance”. That through being “altered in transit” was relayed as “Send three and four pence, we are going to a dance”. Same principle as the parlour game Chinese Whispers. World War One? Apocryphal? Possibly. But it was a very real problem as sensitive military messages were transmitted from sub-station […]

Greg Dean, Radio Software Innovator, Dies at 72

Gregory Dean, founder of a company that pioneered in the areas of radio traffic and billing and automation, died Sept. 11 in Overland Park, Kan., at age 72, the Kansas City Star reports. “Greg Dean was a true pioneer, inventing many of the tools that radio stations have taken for granted for decades,” UncompressedMusic.com CEO and Scott Studios […]

via HACKADAY: The Pre-CRT Oscilloscope

Oscilloscopes are especially magical because they translate the abstract world of electronics into something you can visualize. These days, a scope is likely to use an LCD or another kind of flat electronic display, but the gold standard for many years was the ubiquitous CRT (cathode ray tube). Historically, though, CRTs were not very common […]

via HACKADAY: Op Amps Before Transistors: A 600V Vacuum Tube Monster

Op amps. Often the first thing that many learn about when beginning the journey into analog electronics, they’re used in countless ways in an overwhelmingly large array of circuits. When we think about op amps, images of DIPs and SOICs spring to mind, with an incredibly tiny price tag to boot. We take their abundance […]

via HACKADAY: Memories Of A Mis-Spent Youth: Learnabout Simple Electronics

Early last spring, we featured a book review, as part of our occasional Books You Should Read series. Usually these are seminal tomes, those really useful books that stay with you for life and become well-thumbed, but in this case it was a children’s book. Making a Transistor Radio, by [George Dobbs, G3RJV], was a part of the […]

Saint Maximilian Kolbe sacrificed his life for his fellow man during WW2

On a day like today, 77 years ago, Saint Maximilian Maria Kolbe died a martyr on a 14th of August of the year 1941. He was a Polish Conventual Franciscan friar who volunteered to die in the place of a Jewish man in the Nazi death camp of Auschwitz, located in German-occupied Poland during World War II. Maximilian was active in promoting the veneration […]

via the ARRL: Short-Wave Radio Reports May Offer Best Evidence of Amelia Earhart’s Fate

The International Group for Historic Aircraft Recovery (TIGHAR) believes it has the key to unlock the decades-old mystery of what happened to famed aviator Amelia Earhart and her navigator Fred Noonan in their planned circumnavigation of the globe in 1937. TIGHAR’s The Earhart Project analyzed dozens of radio transmissions received by radio amateurs and other […]

via HACKADAY: Retrotechtacular: Apex Radio — The Forgotten HiFi

Broadcasting has changed a lot in the last few decades. We have satellite radio, internet streaming, HD radio all crowding out the traditional AM and FM bands. FM became popular because the wider channels and the modulation scheme allowed for less static and better sound reproduction. If you’ve never tried to listen to an AM […]

via HACKADAY: Eight Transistor Stereo Amplifier From The Days Of Yore

Reading an article about the first transistorized Hi-Fi amplifier, [Netzener] got the itch to make one. But what to use for the starting point? Enter an old Radio Shack P-Box stereo amplifier kit. After a few modernizations and tweaks, the result is an 8-transistor stereo amplifier that’s aesthetically pleasing, sounds great, and is fully documented. The Radio […]

via HACKADAY: The Bad Old Days of Telephone Answering Machines

Telephone answering machines were almost a fad. They were hindered for years by not being allowed to connect to the phone lines. Then a mix of cell phones and the phone company offering voicemail made the machines all but obsolete. Unless you are really young, you probably had one at some point though. Some had digital […]

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