78xx DC-DC Supply

Inline DC-DC Buck Converter Step Down 4.75V-24V to 1V-17V 1.8A(max < 1 minute) 1.2Amp Constant current.

Note: NODEMCU V3 WiFi module integration of ESP8266 + extra 32Mb  Flash, USB serial, CH340G - Type 1 / CP2102 - Type 2. 

The D1 mini - PRO is a mini wifi board based on ESP-8266EX

MCU-103 SV01A103AEA01R00 rotation angle sensor

The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation, and oscillator applications. 

Integrated 5V active buzzer dia12 * 9.5mm continuous...

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