Arduino Mega 2560 R3 Board Good Quality Clone CH340G Board
$ 10.58
Microcontroller CH340 Operating Voltage 5V Input Voltage (recommended) 7-12V Input Voltage (limits) 6-20V Digital I/O Pins 54 (of which 15 provide PWM output) Analog Input Pins 16 DC Current per I/O Pin 40 mA Dimensions : 111 x 54 x 12 (LxWxH) mm.

Arduino uno SMD R3 with cable
Arduino Compatible ESPLORA Game Programming Module Board
STM32 Minimum Development Board for Arduino
PROXIMITY SENSOR CJF25-07PA Rectangle Type PNP-NO DC10-30V 3 WIRES