 |
Circuits designed by David Johnson, P.E.
Last Updated on:
Tuesday, December 26, 2017 04:15 AM
Master Category List
- Dave's Circuits
Text & Graphics
Copyright © David A. Johnson, PE - ALL Rights Reserved.
LINKING to Dave's circuits is permitted but DO NOT COPY to your WEB SITE server! |
|
|
[DJ-Circuits/DAJ-Categories/ADs-Google/DC-Links-Responsive_GGL.htm] |
|
Sensors
/ Detectors: Position Detectors Circuits |
- 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.
|
|
[DJ-Circuits/DAJ-Categories/ADs-GlobalSpec/ad-smSQ-ihsGS.htm] |
|
- OPTICAL INTERRUPTER DRAWS
MICROAMPS
This circuit is great for battery-powered systems that use slotted type optical
interrupters. It draws only 10uA from a 3v battery that should allow up to 5 years of
operation from a lithium battery.
|
|
[DJ-Circuits/DAJ-Categories/ADs-DAJ-circuits/FS+GGL-728x90.htm] |
|
|
