•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

RF Cafe Software

RF Cascade Worbook
 RF Cascade Workbook 2005 - RF Cafe
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger
BSEE
KB3UON
EIEIO

Carpe Diem!
(Seize the Day!)

5th MOB:
My USAF radar shop

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse riding website

Day in Engineering History Archive February 12
February 12

Heinrich Lenz's Birthday - Please click here to visit RF Cafe.

1791: American inventor Peter Cooper, who invented the first steam locomotive, named "Tom Thumb," was born. 1804: Heinrich Lenz, Russian physicist who framed Lenz's Law to describe the direction of flow of electric current generated by a wire moving through a magnetic field, was born. 1935: Robert Van de Graaff was issued a patent for his Electrostatic Generator design which could generate direct-current voltages higher than the 700kV. 1965: John Hammond, Jr., developer of radio remote control, died. 1973: The first four metric road signs in the U.S. were erected to post metric distance along Interstate 71 in OH. 1998: A 250-car pile-up occurred in Italy, due to fog, causing 4 deaths and 50 injuries. 2000: Peanuts creator Charles Schulz died in his sleep at his home. 2001: NEAR Shoemaker spacecraft touchdown on 433 Eros, becoming the first spacecraft to land on an asteroid. 2004: Mattel announced the split-up of Barbie and Ken.

| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |

Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified.
Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred.

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.