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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM

Bistable Multivibrator or Flip/Flop Circuits    Light Detectors or Optical Sensors
 
HONEYBEE COUNTER
I designed a circuit similar to this one a long time ago to help a beekeeper count the number of bees going into or out of a hive. The low power circuit uses a slotted opto-sensor to detect the passing bees. The circuit advances an electronic counting module whenever a honeybee passes through the sensor. The device only counts the number of bees going through the sensor. A different circuit would be needed to count the number of bees only going out or only coming into the hive.
 

Click on Drawing Below to view PDF version of Schematic

Honeybee Hive Traffic Counter designed by David A. Johnson, P.E. (July 8, 2000)

Bistable Multivibrator or Flip/Flop Circuits   Light Detectors or Optical Sensors
Master Schematic Category List - David A. Johnson, P.E.

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