GSK-918 Data Sheet Datasheet by Global Specialties

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Mosquito Repellent

Model GSK-918

This circuit generates a frequency 10-30 kHz that creates a

sonic zone disturbing to mosquitoes. A piezo board creates the

frequency equal to the frequency generated by the mosquito

during flight causing the mosquito to believe he/she is flying

into a trap.

Technical Specifications

nPower Source: 3 VDC

nPower consumption: 20 mA max.

nPCB dimensions: 1.60 x 1.39 inches

Operating Principles

Transistor 1 and 2 control low frequency 10 kHz, while

transistors 3 and 4 control high frequency 30 kHz. This

circuit is designed to alternate the frequency and transmit

the sound through the piezo board.

PCB Assembly

Please refer to Figures 1, 2, and 3 for aid in component

placement. It is recommended to start with lower components

i.e. diodes, resisters, electrolyte capacitors, and transistors.

Be careful to check polarity with Figure 3 before soldering.

Take extra precaution to ensure electrolytic capacitors are

inserted correctly. If a problem is detected it is best too use a

desoldering pump or desoldering braids to remove component.

This will minimize potential damage to the printed circuit board.

Testing

Connect the piezo board at “PZ” point on PCB. Apply power

source and turn potentiometer “VR1,” a sharp sound should

be omitted from the piezo board.

Troubleshooting

The main cause of problems will come from misplaced

components or faulty soldering. Utilize figure 2 and 3 to

ensure proper placement, polarity and then check solder

points for connectivity.

Accessories

Use GSB-03 (sold separately) to house the PCB and batteries.

Electronic Kit Set for Hobby & Education

Figure 1 Installing components

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www.globalspecialties.com

GSK-918

Figure 3 Connecting Circuits

Resistors

R1, R4 100 Ω brown – black – brown – gold

R2, R3 12 kΩ brown – red – orange – gold

R5, R8 330 Ω orange – orange – brown – gold

R6, R7 3.9 kΩ orange – white – red – gold

Potentiometer

VR1 - 14 or 103 or 10 kΩ

Electrolytic Capacitors

C1, C2 - 33 µF

C3 - 10 µF

Ceramic Capacitors

C4, C5 - 103 or 0.01 µF

Transistors

TR1 – TR4 - C458, C828, C945, C1815

Diode

D1 - 1N4148

Figure 2 Mosquito Repellent Circuit

Products related to this Datasheet

MOSQUITO DETERRENT KIT 10-30KHZ

GSK-918