Esp8266 ws2812 driver 看到有人发过pwm转4~20ma电路,我也发个我的,已经在产品使用,非常稳定 (amobbs.com 阿莫电子论坛) Xtr111: 0~3.3v to 4~20ma
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实用:PWM转4-20mA电路(智能仪表上的电路) (amoBBS 阿莫电子论坛)
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