BD139 NPN Bipolar Medium Power Transistor (BJT) 80V 1.5A TO-126 Package

2N3055 NPN Switching and High Power Amplifier Transistor

Transistor L14F1 Photodarlington

1.3 Inch I2C/IIC OLED Display Module 4pin

Original Arduino UNO R3

KCD1 Round Rocker SPST Switch 2 Leg 6A 250V

2.8 Inch ILI9341 TFT Full-color Touch Screen Shield 320×240 Support UNO MEGA2560

Li-Ion BMS 18650 Lithium Ion Battery Protection Boards