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  • Author Author: tariq.ahmad
  • Date Created: Date Created
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Build your Own Bat Detector with Analog Parts -- Episode 578

This video will show you how to build a bat detector. The bat detector works as a heterodyne receiver that can shift frequencies in the ultrasonic range to range the humans can hear. Using an ultrasonic microphone, you can tune the device to the frequency your bats are using for echo location. As each species uses a different frequency, you could be able to identity the species you are listening to. You can build your own detector, using good old fashion electronics without the use of microcontrollers or sound processing.

Watch the Video:

Supplemental Content:

Bill of Material:

Product Name Manufacturer Quantity Buy Kit
Trimpot, Multi Turn, Cermet, Top Adjust, 200 kohm, Through Hole, 25 Turns Bourns 1 Buy Now
BOURNS POT, LINEAR, 50K, 0.05W, 20%, FLATTED BOURNS 2 Buy Now
MULTICOMP PRO Through Hole Resistor, 1 kohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 3 Buy Now
MULTICOMP PRO Through Hole Resistor, 180 kohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 3 Buy Now
MULTICOMP PRO Through Hole Resistor, 470 ohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 2 Buy Now
MULTICOMP PRO Through Hole Resistor, 1 Mohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 1 Buy Now
MULTICOMP PRO Through Hole Resistor, 200 kohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 1 Buy Now
MULTICOMP PRO Through Hole Resistor, 62 kohm, MF25, 250 mW, ± 1%, Axial Leaded, 250 V MULTICOMP PRO 1 Buy Now
MULTICOMP PRO Through Hole Resistor, 750 kohm, 250 mW, ± 2%, Axial Leaded, 250 V MULTICOMP PRO 4 Buy Now
VISHAY Multilayer Ceramic Capacitor, 1000 pF, 50 V, ± 10%, PC Pin, X7R, 5 mm VISHAY 2 Buy Now
VISHAY Ceramic Disc Capacitor, 470 pF, 100 V, ± 10%, Y5P, 5 mm, Radial Leaded VISHAY 1 Buy Now
MULTICOMP PRO Ceramic Disc Capacitor, 0.1 µF, 50 V, -20%, +80%, Y5V, 5 mm, Radial Leaded MULTICOMP PRO 2 Buy Now
MULTICOMP PRO Electrolytic Capacitor, 47 µF, 16 V, ± 20%, Radial Leaded, 1000 hours @ 85°C, Polar MULTICOMP PRO 2 Buy Now
PANASONIC Electrolytic Capacitor, 10 µF, 16 V, ± 20%, Radial Leaded, 2000 hours @ 85°C, Polar PANASONIC 1 Buy Now
PANASONIC Electrolytic Capacitor, 100 µF, 16 V, ± 20%, Radial Leaded, 2000 hours @ 85°C, Polar PANASONIC 1 Buy Now
CLIFF ELECTRONIC COMPONENTS Phone Audio Connector, 5 Contacts, Jack, 3.5 mm, PCB Mount, Tin over Nickel Plated Contacts CLIFF ELECTRONIC COMPONENTS 1 Buy Now
MULTICOMP PRO LED, Green, Through Hole, T-1 (3mm), 10 mA, 2 V, 572 nm MULTICOMP PRO 5 Buy Now
C&K COMPONENTS Slide Switch, SPDT, On-None-On, Through Hole, 6 A, 120 V C&K COMPONENTS 1 Buy Now
Audio Power Amplifier, 250 mW, AB, 1 Channel, 4V to 12V, DIP, 8 Pins LM386N TEXAS INSTRUMENTS 1 Buy Now
TEXAS INSTRUMENTS Operational Amplifier, LM324N 4 Amplifier, 1.2 MHz, 6V, DIP, 14 Pins TEXAS INSTRUMENTS 1 Buy Now
ARIES IC & Component Socket, 8 Contacts, DIP Socket, 2.54 mm, 518, 7.62 mm, Beryllium Copper ARIES 1 Buy Now
ARIES IC & Component Socket, 14 Contacts, DIP, 2.54 mm, 518, 7.62 mm, Beryllium Copper ARIES 1 Buy Now
BUD INDUSTRIES Battery Retainer Clip, PP3 (9V) x 1, Through Hole, Wire Leads BUD INDUSTRIES 1 Buy Now
HAMMOND Plastic Enclosure, Handheld, Plastic, 130 mm, 65 mm, 25 mm, IP54 HAMMOND 1 Buy Now
MULTICOMP PRO Speaker, 500 mW, 8 ohm, 0 kHz to 6 kHz MULTICOMP PRO 1 Buy Now
MULTICOMP PRO Ultrasonic Sensor, Receiver, 16 mm Diameter, 39 kHz, -65 dB, Aluminium, Silver, -35 °C to 85 °C MULTICOMP PRO 1 Buy Now
IF LM386 is not available, you can use the following 2 components: Buy Now
TEXAS INSTRUMENTS Audio Power Amplifier, AB, 1 Channel, 4V to 12V, MSOP, 8 Pins LM386MMX TEXAS INSTRUMENTS 1 Buy Now
ARIES IC Adapter, 8-SOIC to 8-DIP, 2.54mm Pitch Spacing, 7.62mm Row Pitch, Correct-A-Chip Series ARIES 1 Buy Now
 

Additional Parts:

PCB. You can order it directly from here
You also need a battery 
Some wires

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