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2. Altair 8800 - Wikipedia

   en.wikipedia.org/wiki/Altair_8800

   This "Tracking Light for Model Rockets" project appeared in the September 1969 issue of Model Rocketry and was the first kit sold by MITS.. While serving at the Air Force Weapons Laboratory at Kirtland Air Force Base, Ed Roberts and Forrest M. Mims III decided to use their electronics background to produce small kits for model rocket hobbyists.

3. Remco - Wikipedia

   en.wikipedia.org/wiki/Remco

   1959 Movieland Drive-In Theater (consisted of cars, a drive in board with car spaces, a place to list "Featured Movies" along with blue and white double-bill cards that slid into the marquee; the "movie" was a film strip that projected by a battery operated light bulb onto a 4"x6" screen that attached to the drive in. Titles included Heckle and ...

4. Palmtop PC - Wikipedia

   en.wikipedia.org/wiki/Palmtop_PC

   A Palmtop PC is an obsolete, approximately pocket calculator-sized, battery-powered computer in a horizontal clamshell design with integrated keyboard and display. It could be used like a modern subnotebook, but was light enough to be comfortably used handheld as well. Most Palmtop PCs were small enough to be stored in a user's shirt or jacket ...

5. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   3LR12 (4.5-volt), D, C, AA, AAA, AAAA (1.5-volt), A23 (12-volt), PP3 (9-volt), CR2032 (3-volt), and LR44 (1.5-volt) batteries (Matchstick for reference). This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use.

6. Lemon battery - Wikipedia

   en.wikipedia.org/wiki/Lemon_battery

   A lemon battery is a simple battery often made for the purpose of education. Typically, a piece of zinc metal (such as a galvanized nail) and a piece of copper (such as a penny) are inserted into a lemon and connected by wires. Power generated by reaction of the metals is used to power a small device such as a light-emitting diode (LED).

7. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   A set of modern LED flashlights. A flashlight or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp.Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.