About the article

Marten Repeller

inaudible 90 dB

Marten Repeller
A marten (or to be more precise: stone marten, Martes foina, also known as beach marten, house marten or white breasted marten) is actually a really beautiful animal. To humans the marten is not dangerous, but they can make a great nuisance of themselves — stench, noise, and under the hood even chew through wires and hoses. Because the marten is protected, even when it does become a real nuisance it may not be killed or even caught. What to do? Exactly — ask Elektor for help!
Relevant websites
Extra info / Update
* 9 to 12 VDC supply voltage
* 7 mA average current consumption
* 80 mA current consumption during sound burst
* 2 mA quiescent current consumption
* 20 kHz to 43 kHz adjustable frequency
* intermittent output sound
Component list
From the Store
160052-1 unpopulated circuit board
160052-41 programmed ATtiny25-20 DIP
Component List
Resistors (0.25 W)
R1 = 10kOhm
R2 = 1kOhm
R3 = 100Ohm
P1 = 100kOhm trimpot horizontal
C1= 1µF 16V
C2 = 2.2µF 16V
IC1 = LP2950 (5V)
IC2 = ATtiny25-20 DIP, programmed
D1 = 1N4007
T1 = BS170
LED1 = white
K1,K2 = 2-way pinheader socket, 0.1’’ pitch
S1 = slide switch, PCB mount
BZ = Monacor MPT-001 or similar
PCB # 160052-1
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