Logic Circuits

Logic circuit

1n4148 5V-3.3V

• http://circuits4you.com/2016/12/14/io-level-conversion-esp8266/
• https://forums.adafruit.com/viewtopic.php?f=25&t=117259
• https://electronics.stackexchange.com/questions/244320/can-i-use-a-diode-as-a-level-shifter-and-which-way-should-it-be
• https://zhidao.baidu.com/question/1446506599856343620.html