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Electronic-gift

After the war, electron tubes were used to develop the first computers, but they were impractical because of the sizes of the electronic components. In 1947, the transistor was invented by a team of engineers from Bell Laboratories. John Bardeen, Walter Brattain, and William Shockley received a Nobel prize for their creation, but few could envision how quickly and dramatically the transistor would change the world. The transistor functions like the vacuum tube, but it is tiny by comparison, weighs less, consumes less power, is much more reliable, and is cheaper to manufacture with its combination of metal contacts and semiconductor materials. Development of the television as an electronic device benefitted from many improvements made to radar during World War II. Radar was the product of studies by a number of scientists in Britain of the reflection of radio waves.
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Flashlight (445) - Laser light (48) - Calculator (170) - Radio (226) - Electronic gift (48) - Flashing electronic gift (60) - Electronic fan (67) - Numeral gift (51) - calendar (85) - sound box (17) - theftproof tool (13) -

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Clock
ID: HP-021108
hour meter
ID: HP-021211
permanent calendar
ID: HP-021213
timer
ID: HP-021257
countdown
ID: HP-021254
picture frame
ID: HP-021252
hour meter
ID: HP-021219
clock
ID: HP-021218
sun flowerpot
ID: HP-021450
sun flowerpot
ID: HP-021449
Chronometer
ID: HP-021775
photo frame
ID: HP-022003
solar energy doll
ID: HP-022197
LASER POINTER WITH REMOTE
ID: HP-022187
Digital projection clock
ID: HP-022296
timer
ID: HP-022360
Teach the machine early
ID: HP-001402
Pregnant-teaching tool
ID: HP-001403
Baby teaching machine
ID: HP-001404
Pregnant teaching machine
ID: HP-001405

home prev [1][2][3]next end[ Totals 48 gifts,and 3 pages ]

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