Voltmeter circuit made with 7107 (double meter)
Source: InternetPublisher:无人共我 Updated: 2016/01/31
![7107做的电压表电路(双表)](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/5070862c-3c63-11ec-8f42-086126841eb8.jpg)
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