AVT3135 Electronic Bird Scare User Manual
- June 9, 2024
- AVT
Table of Contents
3135 Electronic Bird Scare
User Manual
**ASSEMBLY
DIFFICULTY
**
AVT3135 Electronic Bird Scare
PDF DOWNLOAD
https://serwis.avt.pl/manuals/AVT3135_EN.pdf
The presented scare is a very effective and environmentally friendly method of bird deterrence. It is a microprocessor-based version of the scare for starlings. The sound emitted, with a volume of more than 100 dB, will successfully flush out not only birds but also small rodents from the garden or warehouse.
Characteristics
- randomly activated beep
- smooth adjustment of siren on frequency
- integrated twilight switch
- supply voltage level check – LED
- light sensor function check – LED
- power supply 12 V / 1 A (battery)
- board sizes: 40×62 mm
Circuit description
Flushing out birds from certain locations sometimes becomes a necessity. Above
all, the mass occurrence of starlings can destroy the many-month work by fruit
growers. The presented microprocessor-based bird scare was designed to
effectively control bird pests. It is sufficient as basic protection against
birds consuming the fruit from the plantation. The repellent is a device that
randomly emits a one-tone sound at a very high volume. Thanks to the twilight
switch, the sound signal will only be activated during the day and,
regardless of the settings selected, the user can be sure that the scare will
not switch on at night.
The schematic diagram of the scare is shown in Figure
- The circuit must be powered from a 12 V battery, e.g. gel battery or stabilised power supply also with 12 VDC and an output current of approximately 1 A.
D1 diode in series with the power supply protects the circuit against incorrect input voltage polarity. Capacitors C1…C4 act as a supply filter. Input voltage from the screw connector X1 goes to the US2 stabiliser. The LDO stabiliser was used to reduce current consumption. The scare operation is controlled by a US1 ATtiny25 microcontroller clocked by an internal clock signal. Resistive divider made up of resistors R3 and R4 connected to port PB3 allows the programme in the microcontroller to measure the battery voltage without the risk of damaging it with too high a voltage. To make the circuit work sparingly and only during the day, a photoresistor PH1 was used, which, together with resistor R5, forms another resistance divider. Voltage signal, dependent on lighting, goes to the PB4 port of the microcontroller.
To simplify operation, the circuit uses only one setting element. This is potentiometer PR1, which is used to set the siren switching on frequency. Adjustment times range from 5 to 30 minutes. For the device to generate a deterrent sounds randomly, the programme was developed in such a way that using the value set by the potentiometer, it recalculates it together with the signal from the photoresistor. The design of the programme also takes into account the number of signals and the duration of the siren at the designated time. This can be from 3 to 8 signals lasting from 2 to 5 seconds. Figure 2 shows LED
Mounting and start-up
Mount the circuit on a board whose design is shown in Figure 3. Photographs will be also helpful when mounting. All components are mounted on a singlesided printed circuit board with size 40 x 62 mm. Start mounting the circuit from soldering resistors and other small-size components and end up with screw connectors and insertion of the US1 integrated circuit into the socket. Once the circuit is mounted, you need very carefully check that the components have not been soldered in the wrong direction or at the wrong locations and that no short-circuits of the soldering points have occurred during soldering. A mistake at this stage of the mounting work can result in damage to components or even explosion.
Circuit flawlessly assembled from functioning components will work straight
away.
Figure 4 shows the correct way to connect the siren and power supply to the
board. If the scare will be exposed to direct weather conditions, it can be
built into the optional Z-54 enclosure to which the PCB is fitted. Photograph
2 shows the board housed in the aforementioned enclosure. When using the AC
adapter to power the scare, it must also be protected from rain and moisture
to prevent possible damage or electrocution to the user.
List of components
Resistors:
R1, R2:………………1 kΩ (brown-black-red-gold)
R3: …………………….1 MΩ (brown-black-green-gold)
R4, R5:………………100 kΩ (brown-black-yellow-gold)
PR1:…………………..mounting potentiometer 1 MΩ (105)
PH1: ………………….photoreistor
Capacitors:
C1: …………………….470 μF !
C2, C3:………………100 nF (may be designated 104)
C4: …………………….100 μF !
Semiconductors:
D1, D2: ……………..1N4007 !
LD1:…………………..any LED !
US1: ………………….ATtiny25 + socket !
US2: ………………….LM2931 !
T1: …………………….BUZ11 (or similar) !
Other:
F1:……………………..fuse 2 A
X1, X2: ………………screw connectors Alarm siren 12 V
Start mounting from soldering the components onto the board in order of size
from smallest to largest. When mounting components marked with an exclamation
mark, pay attention to their polarity.
Photographs of the mounted kit may be helpful.
To access the high-resolution images as links, download the PDF.
PDF DOWNLOAD
https://serwis.avt.pl/manuals/AVT3135_EN.pdf
AVT SPV Sp. z o.o.
Leszczynowa 11 Street,
03-197 Warsaw, Poland
https://sklep.avt.pl/
This symbol means do not dispose of your product with your other household
waste. Instead, you should protect human health and the environment by handing
over your waste equipment to a designated collection point for the recycling
of waste electrical and electronic equipment.
AVT SPV reserves the right to make changes without prior notice.Installation
and connection of the appliance not in accordance with the instructions,
unauthorised modification of components and any structural alterations may
cause damage to the appliance and endanger persons using it. In such a case,
the manufacturer and its authorised representatives shall not be liable for
any damage arising directly or indirectly from the use or malfunction of the
product.
The self-assembly kits are intended for educational and demonstration purposes only. They are not intended for use in commercial applications. If they are used in such applications, the purchaser assumes all responsibility for ensuring compliance with all regulations
References
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