Siren Short Circuits Gopher Invasion

DN Staff

April 28, 2010

2 Min Read
Siren Short Circuits Gopher Invasion

Ed Nauman owns a house situated justuphill from some city-owned property that provides his yard with an endlesssupply of pocket gophers. He has tried to defeat them from digging up hisyard, but without much success until he tried a siren with several annoyingtones. A simple timing circuit drives the siren with a low duty cycle. As BillMurray said in Caddyshack, "Inthe immortal words of Jean Paul Sartre, 'Au revoir, gopher.'"

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Gadget Freak Case 163 Siren Short Circuits Gopher Invasion

Gadget Freak Case 163 Siren Short Circuits Gopher Invasion


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Part Description

Part #

1

LM555 Timer IC, U1

288-0605

1

5 MI(C) Resistor, 1/8W, R2

895-0045

1

500I(C) Resistor, 1/4W, R4

895-0497

1

1000I(C) Resistor, 1/8W, R3

840-0300

1

100 kI(C) Resistor, 1/4W, R1

296-4745

2

0.1 I.25F Capacitor, 50V, C2, C4

852-1170

1

10 I.25F Capacitor, 25V, C3

852-7023

1

100 I.25F Capavitor, 50V, C1

852-7080

1

4-Contact Terminal Block, TB1

512-9244

1

Green LED, LED1

670-1064

1

IRFZ34NPBF MOSFET, Q1

273-1410

1

1N914 Diode, D1

431-0618

1

LM340T-12, 12V Voltage Regulator, U2

288-0523

1

Siren, S1

TXO-86-515-W

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