![DC Power Supply Variable, 30V 5A Bench Power Supply with Encoder Knob, 4-Digits Display, Adjustable Regulated lab Power Supply with 5V 3.6A USB & Type-C Quick-Charge, Output Switch: Amazon.com: Industrial & Scientific DC Power Supply Variable, 30V 5A Bench Power Supply with Encoder Knob, 4-Digits Display, Adjustable Regulated lab Power Supply with 5V 3.6A USB & Type-C Quick-Charge, Output Switch: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/71FaT+gWztL._AC_UF894,1000_QL80_.jpg)
DC Power Supply Variable, 30V 5A Bench Power Supply with Encoder Knob, 4-Digits Display, Adjustable Regulated lab Power Supply with 5V 3.6A USB & Type-C Quick-Charge, Output Switch: Amazon.com: Industrial & Scientific
Why do some older computers have 2 different power plugs on the power supply? One of the power plugs looks like it has the opposite connection to the type we use nowadays. -
![Amazon.com: Pyle Universal Compact Bench Power Supply - 30 Amp Regulated Home Lab Benchtop AC-to-DC Converter w/ 13.8 Volt DC 115/230V AC Switchable, Screw Type Terminals, Cooling Fan - Pyle PSV300 : Electronics Amazon.com: Pyle Universal Compact Bench Power Supply - 30 Amp Regulated Home Lab Benchtop AC-to-DC Converter w/ 13.8 Volt DC 115/230V AC Switchable, Screw Type Terminals, Cooling Fan - Pyle PSV300 : Electronics](https://m.media-amazon.com/images/I/710bCsaDGiL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Pyle Universal Compact Bench Power Supply - 30 Amp Regulated Home Lab Benchtop AC-to-DC Converter w/ 13.8 Volt DC 115/230V AC Switchable, Screw Type Terminals, Cooling Fan - Pyle PSV300 : Electronics
![Amazon.com: Pyle Universal Compact Bench Power Supply - 30 Amp Regulated Home Lab Benchtop AC-to-DC Converter w/ 13.8 Volt DC 115/230V AC Switchable, Screw Type Terminals, Cooling Fan - Pyle PSV300 : Electronics Amazon.com: Pyle Universal Compact Bench Power Supply - 30 Amp Regulated Home Lab Benchtop AC-to-DC Converter w/ 13.8 Volt DC 115/230V AC Switchable, Screw Type Terminals, Cooling Fan - Pyle PSV300 : Electronics](https://m.media-amazon.com/images/I/619QahmB0yL._AC_UF1000,1000_QL80_.jpg)