搜索 - 科创

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看起来和RTL-SDR一个熊样，就算不接天线频谱上也有多如牛毛的功率峰值。当时搞射电望远镜的时候被这玩意坑苦了。

估计买到假的AOD422了，毕竟0.3元一颗，下一版换mos, 换成SI23002，和esp-drone一样，供电也改掉，不使用ESP32 Devkit的AMS1117，外面再画一个DCD...

人家这个是有多少hz刷新率的。。。。要是搞成扫描要好几秒，当然就没有横线了。那个年代把传感器开到若干MHz, 会有gain drift

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