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basic range sensor (URGENT) by using Opamps not timers

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elvinme

New Member
i am required to design a range sensor by using opamps, any kind of capacitors,resistors,LEDs . Timers are not allowed to be used. Also only DC voltage sorce allowed it should not be more than 3 DC sorce. th basic requirement are that:
design a circuit that measures 0-60cm diistance and by the help of 4 LEDs visualize it.
0-20cm 1 LED is on. 20-40 2 LEDs an so on.
TSOP1138(TK 19) allowed to use of course
 
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#12

New Member
You could look at the bottom of this page and see what almula learned when he posted the same homework assignment.
 

elvinme

New Member
timers are used in that project. but we are not allowed to use them.olny opamp and TK19 should be used.
 

atferrari

Well-Known Member
Yes, I run across almula in the chat room seeking for help. But he seemed quite unable to explain the problem more or less precisely.
 
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