Sensors /
Detectors: Motion Sensors
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Sensors /
Detectors -- Main Page
Last Updated on:
Wednesday, April 18, 2012 07:33 AM |
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Circuits Designed by Dave Johnson, P.E. : |
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- Pigeon
Scarecrow
I have an area on my roof where a large flock of pigeons like to roost. Their
nesting materials and droppings really make a mess. Often there is enough junk from
them that it clogs my roof gutters. Perhaps one way to scare them away is with
a device mounted on the roof near their favorite roosting spot. The device....
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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KC7783R PIR Module - Find out more about the economical and easy
to use KC7783R PIR motion sensor module…. [REUK - Renewable Energy UK
website] |
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Motion Alarm Using Piezoelectric Device - An inexpensive
piezoelectric device is used as a motion sensing device for this motion
alarm.... [Designed by David A. Johnson] |
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Pigeon Scarecrow - I have an area on my roof where a large flock
of pigeons like to roost. Their nesting materials and droppings really
make a mess. Often there is enough junk from them that it clogs my roof
gutters. Perhaps one way to scare them away is with a device mounted
on the roof near their favorite roosting spot. The device.... [Hobby
Corner Circuit by Dave Johnson] |
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PIR Camera - A simple automatic motion-detection Digital Camera.
(circuit added 05/09) |
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PIR Motion Detector - (circuit / schematic design added 6/06)
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Shadow Activate Motion Detector - This circuit can sound an alarm when the
shadow of a hand or arm moves over two small photo diodes. …. [Designed by David
A. Johnson] |
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Solenoid trip circuit works at battery's end of life - 8-Jul-04 Issue of EDN
This Design Idea involves a low-power motion-detector circuit that operates from
battery power for extended times. Part of the design includes a solenoid-operated trip
mechanism that triggers whenever it detects motion. The drive circuit for the solenoid
in the original design worked fine as long as the battery was fresh but failed as the
battery got into the middle of its life, even though suf.... [Design Idea by Brad
Peeters, Theta Engineering, Costa Mesa, CA] |
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Ultrasonic Remote Control & Alarm - (electronic schematic / circuit added
4/02) |
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Use a PWM fan controller in an EMI susceptible circuit - 16-Feb-06 Issue of
EDN Control it with either an external negative-temperature-coefficient
thermistor or a PIC microcontroller and its SMBus serial-data bus.... [Design Idea by
Dimitri Danyuk, Niles Audio Corp; Edited by Brad Thompson and Fran Granville] |
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Sensors /
Detectors: Motion Sensors
#'s - I J
- Z
Sensors /
Detectors -- Main Page |
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