The post explains a simple to build ultrasonic insect repellent circuit which can be installed in farms and used by the farmers for driving away all sorts of insects, bugs, grasshoppers etc in order to protect the crops from these potentially harmful pests. The idea was requested by Mr. Cia Brisat.
技术规格
我是一个农民，需要一种简单的排斥装置来用于农业设备，因此我可以减少杀虫剂的使用。
设备功能；
一个。太阳能由可充电电池供电。
b. a multi pulse repeller, keeps changing the ultrasonic pulse it emits. prevent pests from getting used to the sound.
c. effective range: up to 5000sf.
d。超声波频率：从13.5kHz到95kHz。
e。双扬声器或更多。
您能用电路图帮我吗？
thank you.
cia brisat
该设计
拟议的太阳驱虫剂是基于ultrasonic wave generator circuitwhich works by influencing the normal behavior of insects, ultimately driving them away from the area.
该设备通过在超声波水平（高于20kHz）的高频产生高频（用短脉冲）发挥作用。脉冲的频率从5kHz到40kHz，通过特殊的压电传感器或高功率高音高音扬声器在环境中随机选择并在环境中传输。
Referring to the above diagram, the design depicts an ultrasonic frequency generator circuit which features a random frequency selector stage. The idea may be understood with the help of the following explanation:
The IC 555 stages on the left and on the right side are both configured as astable multivibrators for generating the respective frequencies across their output pin#3.
How the IC 555 Operates
The left side IC 555 actually generates the ultrasonic pulses whose frequency is determined by the instantaneous high available across one of the associated sequencingpinouts of the IC 4017。
在IC 4017的10个输出中产生的高逻辑的转换或测序连接阵列中的特定电阻器，以使该电阻允许计算出IC的引脚＃7的电压量，并负责确定特定的超声波频率以确定特定的超声波频率左IC 555阶段。
Why IC 4017 is Used
This enables the production of a randomly changing ultrasonic output at the pin#3 of the left IC 555. These randomly changing frequency ranges can be appropriately fixed by assigning calculated resistors across the indicated outputs of the IC 4017.
The speed at which the random selection is implemented depends on the frequency of the clocks applied at pin#14 of the IC 4017 via the right sideIC 555稳定阶段。
可以通过更改PIN＃7上电阻器或右IC 555的10UF电容器的值来改变此速度。
The 22k pot associated with the left IC 555 is used for adjusting the pulse width of the ultrasonic waves, the best response may be achieved by some experimentation and by some trial and error.
Since the generated ultrasonic waves needs to powerful enough to reach the entire field, the emission impact needs to be extremely powerful.
通过将引脚＃3输出从左IC 555输出到100瓦放大器的输入来确保这一点。该放大器可以在家中使用合适的电路设计（例如TDA7294 IC）或从市场上采购现成单元来构建。
一旦执行了上述所有程序，就可以将高功率传感器或高音扬声器与放大器的输出相连，以启动预期的超声波昆虫驱虫作用。
可以在以下图像中见证了100瓦高音扬声器的一个示例：
电路的电源规格
The circuit is specified to work with any voltage within 6 to 15V, therefore a 12V battery becomes just sufficient for powering the entire unit, although for delivering 100 watts, the AH rating of the battery will need to be at least 50 AH.
为了使电路独立于外部电源，可以合并一个太阳能电池板，以最佳的速度为指定的电池充电，该电池可容纳50 AH铅酸电池的10AMP。
This implies that the solar panel must be rated to produce 20amps at 15V in order to charge the battery, as well as enable the circuit to be driven in the day time while the battery is also being charged simultaneously.
使用10安培电池充电器
A suitable 10 amp solar battery charger circuit for keeping the battery optimally charged may be seen in the following diagram and used accordingly:
亲爱的斯瓦加塔姆
您的电路是一个不错的设计，但是，我很抱歉这个想法不起作用。
我have tested it long ago, bringing the output very close (1") to mosquitoes.
Please see this article.
Dear Abu-Hafss,
我只是设计了用户想要的东西，并且按照他的指示，可能是要求该巡回赛对该概念充满信心的人……不确定吗？
By the way it's intended for bigger pest like grasshoppers, moths, butterflies, rodents, bats….
it might require a few days of practical testing and monitoring to confirm the results
亲爱的斯瓦加塔姆先生。
您能否向我推荐可以支持这些频率的放大器电路？
亲爱的罗纳德（Ronald），您可以尝试使用100瓦的任何放大器电路，您可以在线搜索，也可以尝试以下内容：
//www.addme-blog.com/2012/04/how-to-make-simplest-100-watt-mosfet.html
亲爱的斯瓦加塔姆，
我am working on a project ultrasonic plastic welding, which requires 15htz/20htz/40htz and 1500W – 2000W power. Is it possible to use this circuit with ready made 2000w amplifier. Then I need fixed frequency and continuous pulse. what modification should be done to avoid randomly changing frequency. Or can I use the simple mosquito repellent circuit.
谢谢。
Dear Vijayan, for a reliable functioning an IC 4060 based oscillator would be a better option
you can try the basic design shown below
//www.addme-blog.com/2011/12/how-to-understand-ic-4060-pin-outs.html
Hai sir….
请告诉RX的值
10抗数的价值
Hi Kesav, the values will need to be experimented with.
initially you can bewteen 10K to 100K uniformly distributed values for the 10 resistors, and check the response, and later on change the values to archived higher accuracy
先生，你好，
我’m a college student.Our design project is to make solar ultrasonic pest repellent with variable frequency changing,also a fluorescent lamp attached to the device.Can u please share me the block diagram,working and components used.Tomorrow is the last date to submit PPT…:)
Hello Agnus, the complete schematic is already given in the above article.
For the fluorescent driver you can try this simple idea:
//www.addme-blog.com/simple-20-watt-tube-emergency-light/