Quantity   Component name
1 × KeyDuino https://www.elecrow.com/keyduino-p-1620.html
1 × DC connector http://www.aliexpress.com/item/Free-Shipping5-5mm-x-2-1mm-DC-Charger-Jack-Socket-Female-Panel-Mount-Connector-Adapter-Copper/32237173613.html
1 × led push button http://www.aliexpress.com/item/250VAC-2A-DC-5V-Blue-LED-Light-SPST-Momentary-Type-Pushbutton-Switch/32434384285.html
1 × DC lock http://www.aliexpress.com/item/Cabinet-Door-Electric-Lock-Assembly-Solenoid-DC-12V-0-6A-TFS-A12-Square-bevel-latch/32269309480.html
1 × TIP120 transistor http://www.aliexpress.com/item/Free-Shipping-10PCS-TIP120-TO-220/1147452556.html?ws_ab_test=searchweb201556_1_79_78_77_80,searchweb201644_5,searchweb201560_9
1 × 200Ohm resistor
1 × 12v battery http://www.aliexpress.com/item/Double-Layer-Ni-MH-AA-Battery-12v-1800-mAh/32216474011.html