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One of the DC power supply voltage limit indication circuits
Source: InternetPublisher:张小哥 Keywords: DC power supply supply voltage BSP Updated: 2020/01/12
The DC power supply undervoltage and overvoltage indicator circuit is shown in Figure 13-93. Use it to monitor whether the DC power supply voltage
is normal.
When the power supply voltage is 12V, adjust RP so that the sampling voltage is 6V. Neither LED lights up. When the power supply
voltage is lower than 11.9V, the green light-emitting diode VLz lights up; when the power supply voltage exceeds 12.1V, the red light-emitting diode
VLi lights up. '
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