Introduction - If you have any usage issues, please Google them yourself
This example uses the 8-bit current-type D/A converter DAC0808 and operational amplifiers, run this example, press the k1 ~ k8 a button, the microcontroller will be output to the digital-analog converter chip between 8 0x00 ~ 0xFF different values, after converting the file will be 8 different output voltages. Program for eight key independent definition of the D/A converter chip different bytes, so that the output voltage of 8 different files when you press a different key. In this case, the reader debugging, you can modify the program, with one of two buttons increase or decrease the voltage, the rest of the keys used to achieve different accuracy adjust settings (such as 0.1, 0.01, etc.), to achieve a more precise digital control voltage output.