1-cell 18650 Battery Holder Capacity: 1x 3.7V 18650 Lithium Cell  

390uH (0.39mH)inductor 370mA 690m ohm radial vertical inductor

TIP35c 100v 25A NPN Power Transistor

DTECH DT-5019 USB To RS485/422 Industrial Converter Serial Line Communication Adapter(1.2m)

8aa back to back battery holder

2k 1/4w carbon film resistor

ca3140 op amp

nano io shield v1.0 expansion board

DC12V 0.43A 4mm Mini Electromagnetic Solenoid Lock Push Pull Type for Electirc Door Lock

HLK-PM03 Hi-Link 3.3V 1A 3W AC To DC Power Supply Module

HLK-5M12 Hi-Link 12V 0.42A 5W AC To DC Power Supply Module

HLK-20M09 Hi-Link 9V 2.2 A 20W AC to DC Power Supply Module