This 3 to 24 volt variable-regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks and the current sense resistor should be rated at 3 watts or more.

With BFG EX-1200 Power Supply, BFG is introducing the Modular, Frequency Conversion Power Supply: The EX Series. By using Frequency Conversion technology, the EX1200 power supply can actually emulate virtually any size power supply and therefore be at least 80% efficient, even with loads as low as 10% of the unit’s maximum capability.

With EX-1000 Power Supply BFG Tech has taken a whole new approach to computer power supplies. EX power supplies have the lowest minimum load requirements and the best +5VSB efficiency on the market. BFG Tech uses all Japanese capacitors for longer life and gold-plated pins for improved conductivity.
Includes six PCI Express® Connectors for Multi Graphics Card Support, features new 8-Pin PCI Express, connectors, quad 12V Rails and lifetime Warranty* and 24/7 Tech Support.

With HV4205E you can build a simple single chip voltage converter. With IC and a few external components connected like in the schematic you can obtain dc stabilized voltages between 5 to 24V directly from main power source (100 to 260V ac). The maximum output current is 50mA.

Antec launched new power supplies with new features and same true power. The TruePower New series by Antec offers users an advanced power supply solution, striking the perfect balance of reliability, efficiency and quality. With DC to DC voltage regulator modules, a 120mm PWM fan, and 80 PLUS® Bronze certification, the TP-550, TP-650, TP-750 and TP-750 Blue are the ideal solution for elite system builders and quality-minded enthusiasts alike.