• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos | Circuits for Beginners | Basic Circuits | Hobby Projects | Transistor Circuits | LED Drivers 

You are here: Home / 555 IC Circuits / Bird in the Nest Indicator Circuit

Bird in the Nest Indicator Circuit

Last Updated on July 6, 2019 by Swagatam 4 Comments

caution electricity can be dangerous

The post discusses a simple infrared based proximity sensor circuit which is implemented to study birds and their behavior, by installing the circuit beside artificially made bird nests. The idea was requested by Mr. Jan Simberg.

Technical Specifications

I hope you have time to read these few lines. First of all thanx for interesting schemas! They are working, too! We are three guys who are studing birds and we have abt 1700 bird nests to check. The bird nest is a small wooden box with a hole in the front.

I'm NOT an electrician but I'm trying to find an inexpencive way to lit a LED outside the nest (only some tens!) when a bird is in. The LED has to flash abt 5 min after every detection of movement.

I can use an rechargeable battery and a solar cell from a garden light - this is OK. I found your "Accurate Infrared Motion Detector or Proximity Detector Circuit" in the Internet and that could be a solution. Can I change the buzzer to a LED with a resistor?

Secondly I found your "Low battery indicator circuit using two transistors only" and that a was a hit. What is the lowest voltage for a rechargeable battery pack 4 times 1,2V = 4,8V? Any ideas how to drop the current consumption? What abt the 5min latch on?

Eddy current and PIR detectors could work but I think they consume current too much. Ultrasound detectors are out of the question - what frequency does a bird hear?

At last, I made a quick PCB layout for your IR detector. Pls delete if too horrible.

Regs,

Jan Simberg

The Design

The proposed bird in the nest detector circuit may be understood with the following points:

The IC LM567 is configured in its standard phase locked loop frequency detector mode.

The IR photo diode LD274 is fed with the set frequency from the IC and this photodiode becomes the transmitter device.

Another photodiode BP104 is positioned parallel to the above photodiode such that it can receive the reflected IR rays in the presence of an obstacle (a bird here) within the specified distance in front of them.

The BP104 becomes the receiver IR device of the circuit, and is tuned to respond only to the reflected rays from LD274 and not to any other spurious invasions.

As soon as an obstacle is detected, the BP104 triggers and activates the IC LM567 with a low logic at its output pin8.

However the above triggered low logic will be active only for so long as the intruder is preset in the detection zone.

In order to keep the output sustained for a reasonable period of time, an IC 555 monostable is introduced in conjunction with the IC LM567.

The IC 555 accepts the low signal from pin8 of LM567 and keeps its pin3 high for some predetermined length of time even after the LM567 output is deactivated due to a possible abrupt disappearance of the obstacle.

The period for which pin3 of IC 555 remains ON may be set by suitably adjusting the values of  R9/C5

The transistor T3 restricts and inhibits C5 from charging until pin8 of LM567 is deactivated due to removal of the obstacle.

The above step ensures that the IC 555 output latch ON timing initiates only after the bird has entered the nest, this also ensures that the IC 555 output executes the predetermined time latch only after the pin8 of the IC LM567 has become inactive.

Circuit Diagram

The PCB design for the above circuit, sent by Jan:

 

You'll also like:

  • 1.  How to Control a Servo Motor using IC 555
  • 2.  Make this Simple Set Reset Circuit using IC 555
  • 3.  Programmable Temperature Controller Circuit with Timer
  • 4.  IC 555 LED Flasher Circuits (Blinking, Flashing, Fading Effect)
  • 5.  Making a Parasite Zapper Circuit
  • 6.  Car Radiator Hot Indicator Circuit

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
4 Comments
Newest
Oldest
Inline Feedbacks
View all comments

Primary Sidebar

Calculators

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (98)
  • 741 IC Circuits (19)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (114)
  • Battery Chargers (82)
  • Car and Motorcycle (94)
  • Datasheets (46)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (100)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (116)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (13)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (29)
  • Home Electrical Circuits (102)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (93)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (65)
  • Mini Projects (148)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (26)
  • PIR (Passive Infrared) (8)
  • Power Electronics (34)
  • Power Supply Circuits (77)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (61)
  • Sensors and Detectors (120)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (60)
  • Timer and Delay Relay (53)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (40)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz