### Simple voltmeter design **<span style="font-size:16px;">Project name：</span>**<span style="font-size:16px;">Simple voltmeter design.</span> **<span style="font-size:16px;">Specific requirements：</span>**<span style="font-size:16px;">XADC collect external voltage to display to LCD, no switch open to display PERFXLAB, open switch one to display the temperature inside the chip, open switch two to display the collected voltage.</span> **<span style="font-size:16px;">System design：</span>** <span style="font-size:16px;"> IIC bus to send configuration, configure the LCD, use a channel of XADC to connect the external stable voltage, also use the IIC bus to transfer the voltage data to the LCD to complete the voltmeter design. </span> **<span style="font-size:16px;">Implementation process：</span>** <span style="font-size:16px;"> 1 Connect the development board and LCD1602 according to the 2 Generate a bitstream and download it to the development board. 3 Turn on switch two. 4 Use the power supply to output a stable voltage to the development board to display the results. (If the display is unstable press the reset button) </span>  ---