12V 5A switching power supply : ID 352 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Brass Liquid Solenoid Valve - 12V - 1/2 NPS : ID 996 : $24.95

12V DC 1000mA (1A) regulated switching power adapter - UL listed

Switching Split Power Supply ± 12V 500mA Split Supply : ID 2591

5V 1A (1000mA) USB port power supply - UL Listed : ID 501 : $5.95

INVENTO 12V 5A 60 Watt DC Power Supply AC Adaptor SMPS AC to DC

Stereo 20W Class D Audio Amplifier - MAX9744 : ID 1752 : $19.95

2.1mm DC Barrel Jack to Alligator Clips : ID 1328 : $1.95

ALITOVE DC 12V 5A Power Supply Adapter Converter Transformer AC

12V 5A switching power supply : ID 352 : $24.95 : Adafruit

12V 5A switching power supply : ID 352 : $24.95 : Adafruit

5V 2.5A Switching Power Supply with 20AWG MicroUSB Cable : ID 1995

Stepper motor is locking up - Motors, Mechanics, Power and CNC

In-line power switch for 2.1mm barrel jack : ID 1125 : $2.50

12V 5A switching power supply : ID 352 : $24.95 : Adafruit

Easy Electronics 5 Volt 5 Amp DC Power Supply SMPS (5V 5A) 25