Sensors: / Detectors: Light Detectors electronic circuits, Page 2 E-K


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Sensors / Detectors: Light Detectors and Optical Sensors Page 2
Sensors / Detectors -- Main Page
Light Detectors / Optical Sensors: #-C D-K L M-R S-Z
Last Updated on: 07/13/2008 04:32:02 PM

Circuits Designed by Dave Johnson, P.E. :

FET INPUT HIGH SPEED LIGHT DETECTOR
This circuit is yet another design that converts current from a PIN photo diode to a voltage. It has a bandwidth that extends beyond 50MHz.

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.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Dark Activated Switch or Porch Light Switch: (added 8/03)

Dark activated Switch: (Electronic circuit added 4/05)

Dark/Light Activated Relay: (added 10/02)

Dark-activated 230V Lamp: Compact circuitry using small-size parts only. Can be wired in parallel to existing switches. (circuit design added 3/05)

Dark-activated LED or Lamp Flasher: Simple photo-sensitive circuit - 3V battery supply (Circuit added 9/04)

Day and Night Infrared Detection: (added 8/03)

Demodulator Makes Low Cost Optical Tracker: 06/18/98 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)

Digitally control room light intensity: 11/11/04 EDN Design Ideas / (added 11/05) Many people favor different light and temperature settings for different rooms depending upon their mood or whether they are working or relaxing. The circuit in Figure 1 controls the intensity of the artificial light in a room and monitors the temperature of two zones. The two main circuit blocks are the PIC16C67 master controller and the ADT7516 temperature-sensor interface, which includes a ...

Infrared to Light Converter: This circuit converts infrared light into sound. Modulated Infrared light, like that ROM remote controls, Infrared received by the phototransistor and is amplified by the LM386 IC. (Electronic circuit added 5/02)

Introduction To Photovoltaic By-Pass Diodes: MicroNote 304 from Microsem (app note added 6/06)

Light Detectors / Optical Sensors: #-C D-K L M-R S-Z