击落模型定位器电路

2011-05-26 08:37:06来源: 互联网 关键字:击落  模型  电路

击落模型定位器电路 (Downed Model Locator II)

       Here is another device to help you locate your downed R/C sailplane in the bushes and weeds.  Similar to the other design, this circuit plugs into a spare servo socket on your receiver, and it is a pulse omission detector.  The alarm sounds when pulses originating from your transmitter are no longer being received--turn off your transmitter to turn on the alarm and help you find your plane.  This circuit is simpler than the other design, is much easier to build, but is not quite as specific.  While the other design tests for a specific frequency of pulses, this design is less picky, and may not work quite as well in areas with more radio frequency background noise.  This design was originally collected from another web site, but the site has gone off-line and I'm unable to give proper credit to the individual.  I modified the original design a little to make it work more reliably with the more aggressive automatic gain control of some of the current receivers.

The circuit draws 1mA (!) when idle and 7 when buzzing. You can use a piezo buzzer right on the board (light and compact), a large piezo buzzer on a short wires (louder and easier to hear tone),  or use the magnetic buzzer (a little heavier but good raspy sound).  With the transmitter off, the alarm is mostly on, punctuated now and then by a servo wiggle and alarm silence from background radiofrequency noise pulses.  This device is easy to build and works great.  It's amazing how much your search time will be cut even with wind or surf noise in the background.  Being able to hear it from 20 feet away often makes the difference between finding and not finding a plane.

If your plane went down because of radio interference, this device may not sound much.  If you think it may have been interference from another pilot's transmitter on your frequency, be sure to have the other transmitter turned off before you go hunting for your plane.

The circuit uses your receiver battery for power. For the ultimate in reliability, you can use an additional battery to supply the alarm as follows. Connect only signal and negative leads to your receiver socket, and connect the second battery positive to positive circuit lead and negative to negative circuit lead. You will need to put some kind of switch in series with the second battery to keep it from running the alarm when you are not flying. With the extra battery, you will still be able to find your plane if your plane went down because of a receiver battery failure, or if your receiver battery fell out in the crash. Note: Do NOT solder to a button battery--they explode.

Here are few Radio Shack parts numbers.  Please note that any type of capacitor will work (ceramic, electrolytic, etc.) but that the tantalum and monolithic capacitors are very small.  The tantalum capacitors are polarized, but at these low voltages, the polarity probably does not matter.

关键字:击落  模型  电路

编辑:eeleader 引用地址:http://www.eeworld.com.cn/gykz/2011/0526/article_6135.html
本网站转载的所有的文章、图片、音频视频文件等资料的版权归版权所有人所有,本站采用的非本站原创文章及图片等内容无法一一联系确认版权者。如果本网所选内容的文章作者及编辑认为其作品不宜公开自由传播,或不应无偿使用,请及时通过电子邮件或电话通知我们,以迅速采取适当措施,避免给双方造成不必要的经济损失。

上一篇:PWM马达/灯控制器电路
下一篇:红外遥控电路

关注eeworld公众号 快捷获取更多信息
关注eeworld公众号
快捷获取更多信息
关注eeworld服务号 享受更多官方福利
关注eeworld服务号
享受更多官方福利
推荐阅读
全部
击落
模型
电路

小广播

独家专题更多

迎接创新的黄金时代 无创想,不奇迹
迎接创新的黄金时代 无创想,不奇迹
​TE工程师帮助将不可能变成可能,通过技术突破,使世界更加清洁、安全和美好。
TTI携TE传感器样片与你相见,一起传感未来
TTI携TE传感器样片与你相见,一起传感未来
TTI携TE传感器样片与你相见,一起传感未来
富士通铁电随机存储器FRAM主题展馆
富士通铁电随机存储器FRAM主题展馆
馆内包含了 纵览FRAM、独立FRAM存储器专区、FRAM内置LSI专区三大部分内容。 
电子工程世界版权所有 京ICP证060456号 京ICP备10001474号 电信业务审批[2006]字第258号函 京公海网安备110108001534 Copyright © 2005-2017 EEWORLD.com.cn, Inc. All rights reserved