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第二,亮度控制:微处理器③脚输出亮度控制脉宽调制电压,经R_(130)、C_(130)滤波后得0～5V直流电压,经封接口B_3+B_4,至LM324⑩脚,经内部运放电平转换后由⑧脚输出,经R_(135)、R_(136)、R_(137)电阻网络后输出0.5～3V的控制电压,送到解码电路、亮度控制电路来实现亮度控制。第三,色饱和度控制:微处理器④脚输出色饱和度脉宽调制电压,经R_(140)、C_(130)滤波至LM324⑤脚,由⑦
Second, the brightness control: microprocessor ③ pin output brightness control pulse width modulation voltage, the R_ (130), C_ (130) filter 0 ~ 5V DC voltage, the sealing port B_3 + B_4, to the LM324⑩ foot, the Output from the internal op amp level by the ⑧ foot output, the R_ (135), R_ (136), R_ (137) resistor network output 0.5 ~ 3V control voltage to the decoding circuit, the brightness control circuit to achieve brightness control. Third, the color saturation control: Microprocessor ④ foot output color saturation pulse width modulation voltage, the R_ (140), C_ (130) filter to the LM324 ⑤ feet from ⑦