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Gadget Freak Case File #173: Toy Machine Gun Zaps Pests

Gadget Freak Case File #173: Toy Machine Gun Zaps Pests

Do neighborhood animals dig up your flower beds or get into your trash? Rick Prescott created a computer-controlled "machine gun" to help deter local pests, including the two-footed kind that invade work cubes. Rick mated an infrared sensor with a Nerf-brand gun that shoots spongy "bullets" to create the Infrared-Seeking Sentinel. An Atmega168 microcontroller tracks a heat source and unleashes either a single shot or a fury of automatic fire. Zap, zap, zap. Take that, Mr. Dog.

Gadget Freak 173 Nerf Gun

Get Build Instructions and Parts List | Post a Comment | Watch the Video - Part 1 Part 2 Part 3 | Submit Your Gadget Freak Design

Updated Gadget Freak 173 Schematic
Gadget Freak Parts Listing - Excel Format


Allied Electronics Parts
Amount Description Part #
1

Header, 2 Pin, Right Angle

512-5599

1

Header, 4 Pin, Right Angle

512-5598

1

Header, 6 Pin, Straight

863-0669

1

DIP Switch, Surface Mount, 4 Position

948-0181

1

Rocker Switch, 2 Position

870-0941

1

5V Regulator, LM2937IMP-5.0

288-0444

1

10 muF Capacitor, Tantalum, SMT

213-1110

1

22 muF Capacitor, Tantalum, SMT

213-0049

1

Amber LED

679-4305

1

ATMEGA168-20AU Microcontroller

652-0394

1

Cap 0.01muF 50V, 0603 Ceramic Chip

541-0783

1

ULN2803ADW, Darlington Transistor Array

735-2167

1

Push Button, Normally Open

821-0327

1

Rocker Switch, SPDT, On-Off-On

908-0102

3

0.1 muF Capacitor, 100V

541-1044

2

330-Ohm Resistor, 1/4 watt, 1%

895-4869

2

18 pFCapacitor, 16V, 0603 Ceramic Chip

541-0812

3

10 KOhm Resistor, 1/4W, 5%

895-3995

1

Enclosure, 4.7x4x2 inches

806-3619

1

Power MOSFET, SUD23N06-31L-E3

307-0622

1

10K Ohm Resistor, 1/4W, 5%

296-4743

1

12V Battery, 7.2 AHr, Sealed Lead Acid

710-1266

1

Stepper Motor, 12V DC

316-0048

1

Connector, 2 Pin

512-0222

2

Connector, 4 Pin

512-0226

1

Connector, 6 Pin

512-0232

16

Connector Pins

512-1091

4 in.

Heat Shrink Tubing, 3/4-in. Diameter

689-0433

4 in.

Heat Shring Tubing, 3/8-in. Diameter

689-0415

1 in.

Heat Shrink Tubing, 1/8in. Diameter

689-0411

4 ft.

Spiral Wrap, 1/4in. Diameter

805-3010

2

Crimp Connector

607-0198

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