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.
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Updated Gadget Freak 173 Schematic
Gadget Freak Parts Listing - Excel Format
| Amount | Description | Part # | |
| 1 | Header, 2 Pin, Right Angle | ||
| 1 | Header, 4 Pin, Right Angle | ||
| 1 | Header, 6 Pin, Straight | ||
| 1 | DIP Switch, Surface Mount, 4 Position | ||
| 1 | Rocker Switch, 2 Position | ||
| 1 | 5V Regulator, LM2937IMP-5.0 | ||
| 1 | 10 muF Capacitor, Tantalum, SMT | ||
| 1 | 22 muF Capacitor, Tantalum, SMT | ||
| 1 | Amber LED | ||
| 1 | ATMEGA168-20AU Microcontroller | ||
| 1 | Cap 0.01muF 50V, 0603 Ceramic Chip | ||
| 1 | ULN2803ADW, Darlington Transistor Array | ||
| 1 | Push Button, Normally Open | ||
| 1 | Rocker Switch, SPDT, On-Off-On | ||
| 3 | 0.1 muF Capacitor, 100V | ||
| 2 | 330-Ohm Resistor, 1/4 watt, 1% | ||
| 2 | 18 pFCapacitor, 16V, 0603 Ceramic Chip | ||
| 3 | 10 KOhm Resistor, 1/4W, 5% | ||
| 1 | Enclosure, 4.7x4x2 inches | ||
| 1 | Power MOSFET, SUD23N06-31L-E3 | ||
| 1 | 10K Ohm Resistor, 1/4W, 5% | ||
| 1 | 12V Battery, 7.2 AHr, Sealed Lead Acid | ||
| 1 | Stepper Motor, 12V DC | ||
| 1 | Connector, 2 Pin | ||
| 2 | Connector, 4 Pin | ||
| 1 | Connector, 6 Pin | ||
16 | Connector Pins | ||
4 in. | Heat Shrink Tubing, 3/4-in. Diameter | ||
4 in. | Heat Shring Tubing, 3/8-in. Diameter | ||
1 in. | Heat Shrink Tubing, 1/8in. Diameter | ||
4 ft. | Spiral Wrap, 1/4in. Diameter | ||
| 2 | Crimp Connector | ||