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Special giveaway event, where the winner will receive a $200 PCBA coupon or a Raspberry Pi 4 Computer 8GB.

I have made a lot of ESP32-related boards, but there actually some problems we encountered, the most problem is its ADC. See my test result and some cautions in Using ESP32 ADC.

We found a problem with our ESP8266 WiFi shield firmware upgrade: some firmware versions may not come true user's HTTP request function, here we will tell how to solve it.

PCB assembly is Makerfabs daily work, and there always be problem, we made some production errors in recently Lora soil moisture sensors.

This article will introduce how to make an ultrasonic levitation device, allowing you to experience the scenes in sci-fi blockbusters at home.