Electronic dog triggered by footsteps
Source: InternetPublisher:三月小雨 Updated: 2017/08/03
![用脚步声触发的电子犬](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/2b461994-3c64-11ec-b2f5-086126841eb8.jpg)
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