Pololu item #: 2120
Price: $9.95

Pololu Step-Up/Step-Down Voltage Regulator S8V3A

This switching regulator uses the SEPIC topology to provide a regulated output voltage that can be higher than, the same as, or lower than the input voltage, making it great for applications with widely-varying power supplies and for battery-operated applications where the battery transitions from being above the output to below the output as it discharges. The tiny (0.4"×0.7") module can support input voltages from 1.5 V to 12 V, has an adjustable output from 2 V to 12 V, and can supply over 300 mA in typical applications.

Pololu item #: 2110
Price: $14.95

Pololu Step-Down Voltage Regulator D15V35F5S3

The compact (1.68"×0.46") D15V35F5S3 switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 24 V and efficiently reduces it to a lower, user-selectable voltage. The selectable output voltages are 5 and 3.3 V, and it can deliver up to 3.5 A continuous in typical applications.

Pololu item #: 2111
Price: $24.95

Pololu Step-Down Voltage Regulator D15V70F5S3

The compact (1.9"×0.6") D15V70F5S3 switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 24 V and efficiently reduces it to a lower, user-selectable voltage. The selectable output voltages are 5 and 3.3 V, and it can deliver 7 A continuous in typical applications.

Pololu item #: 2101
Price: $7.95

Pololu Step-Down Voltage Regulator D24V3ALV

The compact (0.4"×0.6") D24V3ALV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 2.5 to 7.5 V and a maximum output current of 300mA. The pins have a 0.1" spacing, making this board compatible with standard solderless breadboards and perfboards.

Pololu item #: 2102
Price: $7.95

Pololu Step-Down Voltage Regulator D24V3AHV

The compact (0.4"×0.6") D24V3AHV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 4 to 25 V and a maximum output current of 300mA. The pins have a 0.1" spacing, making this board compatible with standard solderless breadboards and perfboards.

Pololu item #: 2103
Price: $9.95

Pololu Step-Down Voltage Regulator D24V6ALV

The compact (0.4"×0.6") D24V6ALV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 2.5 to 7.5 V and a maximum output current of 600mA. The pins have a 0.1" spacing, making this board compatible with standard solderless breadboards and perfboards.

Pololu item #: 2104
Price: $9.95

Pololu Step-Down Voltage Regulator D24V6AHV

The compact (0.4"×0.6") D24V6AHV switching step-down (or buck) voltage regulator takes an input voltage between 4.5 and 42 V and efficiently reduces it to a lower, user-adjustable voltage. It has a output voltage range of 4 to 25 V and a maximum output current of 600mA. The pins have a 0.1" spacing, making this board compatible with standard solderless breadboards and perfboards.

Pololu item #: 799
Price: $11.95

Pololu Adjustable Boost Regulator 4-25V

This powerful, adjustable boost regulator can generate an output voltage as high as 25 V from an input voltage as low as 1.5 V, all in a small, 0.42" x 0.88" x 0.23" package. A trimmer potentiometer lets you set the boost regulator’s output voltage to a value between 4 and 25 V.

Pololu item #: 791
Price: $11.95

Pololu Adjustable Boost Regulator 2.5-9.5V

This powerful, adjustable boost regulator can generate an output voltage as high as 9.5 V from an input voltage as low as 1.5 V, all in a tiny, 0.42" x 0.88" x 0.23" package. A trimmer potentiometer lets you set the boost regulator’s output voltage to a value between 2.5 and 9.5 V.

Pololu item #: 798
Price: $5.45

Pololu 5V Boost Regulator NCP1402

This extremely compact boost regulator generates 5 V from voltages as low as 0.8 V and delivers up to 200 mA, making it perfect for powering small 5V electronics projects from 1 to 3 NiMH, NiCd, or alkaline cells or from a single lithium-ion cell.

Pololu item #: 2177
Price: $11.95

5V 3A BEC Step-Down Voltage Regulator

This switching step-down (or buck) voltage regulator takes an input voltage of up to 23 V and reduces it to 5 V with a maximum output current of 3 A. It has 22-AWG input leads with stripped and tinned terminations and a 3-pin “JR”-style servo connector on the output lead.

Pololu item #: 784
Price: $9.95

Bodhilabs VPack Boost Regulator - Square

This board from Bodhilabs is a convenient way to add a step-up voltage regulator to your electronics circuit, allowing you to power your digital logic from two-cell battery packs. The board ships with its regulated output voltage set to 5 V, but you can control the output voltage by changing resistor RF2.

Pololu item #: 795
Price: $9.95

Bodhilabs VPack Boost Regulator - Rectangular

Pololu item #: 783
Price: $10.95

Bodhilabs VPack5.0V 2-AAA Battery Holder w/ 5V Regulator

This battery holder from Bodhilabs takes two AAA cells and has an efficient 5V step-up regulator on the back, giving you a simple power source for your 5V circuits.

Pololu item #: 782
Price: $10.95

Bodhilabs VPack5.0V 1-AA Battery Holder w/ 5V Regulator

This battery holder from Bodhilabs takes one AA cell and has an efficient 5V step-up regulator on the back, giving you a simple power source for your 5V circuits.

Pololu item #: 781
Price: $10.95

Bodhilabs VPack5.0V 2-AA Battery Holder w/ 5V Regulator

This battery holder from Bodhilabs takes two AA cells and has an efficient 5V step-up regulator on the back, giving you a simple power source for your 5V circuits.

Pololu item #: 797
Price: $10.95

Bodhilabs VPack3.3V 1-AAA Battery Holder w/ 3.3V Regulator

This battery holder from Bodhilabs takes one AAA cell and has an efficient 3.3V step-up regulator on the back, giving you a simple power source for your 3V3 circuits.

Pololu item #: 796
Price: $10.95

Bodhilabs VPack3.3V 1-AA Battery Holder w/ 3.3V Regulator

This battery holder from Bodhilabs takes one AA cell and has an efficient 3.3V step-up regulator on the back, giving you a simple power source for your 3V3 circuits.

Pololu item #: 1460
Price: $5.95

Wall Power Adapter: 5VDC, 1A, 5.5x2.1mm Barrel Jack, Center-Positive

This 5W, “wall wart”-style switching power adapter supplies up to 1 A at a regulated 5 VDC. The AC adapter works with input voltages of 100 – 240 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

Pololu item #: 1461
Price: $9.95

Wall Power Adapter: 5VDC, 3A, 5.5x2.1mm Barrel Jack, Center-Positive

This 15W, “wall wart”-style switching power adapter supplies up to 3 A at a regulated 5 VDC. The AC adapter works with input voltages of 100 – 240 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

Pololu item #: 1463
Price: $5.95

Wall Power Adapter: 9VDC, 1A, 5.5x2.1mm Barrel Jack, Center-Positive

This 9W, “wall wart”-style switching power adapter supplies up to 1 A at a regulated 9 VDC. The AC adapter works with input voltages of 100 – 240 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

Pololu item #: 1464
Price: $11.95

Wall Power Adapter: 9VDC, 3A, 5.5x2.1mm Barrel Jack, Center-Positive

This 27W, “wall wart”-style switching power adapter supplies up to 3 A at a regulated 9 VDC. The AC adapter works with input voltages of 90 – 260 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

Pololu item #: 1466
Price: $5.95

Wall Power Adapter: 12VDC, 1A, 5.5x2.1mm Barrel Jack, Center-Positive

This 12W, “wall wart”-style switching power adapter supplies up to 1 A at a regulated 12 VDC. The AC adapter works with input voltages of 100 – 240 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

Pololu item #: 1467
Price: $11.95

Wall Power Adapter: 12VDC, 3A, 5.5x2.1mm Barrel Jack, Center-Positive

This 36W switching power adapter supplies up to 3 A at a regulated 12 VDC. The AC adapter works with input voltages of 90 – 260 VAC and has a removable 1 m (3.3 ft) AC power cord and a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector. A green LED indicates when the device is supplying DC power.

Pololu item #: 1468
Price: $19.95

Wall Power Adapter: 12VDC, 5A, 5.5x2.1mm Barrel Jack, Center-Positive

This 60W switching power adapter supplies up to 5 A at a regulated 12 VDC from input voltages of 100 – 240 VAC. It has a 1.5 m (5 ft) AC power cord terminated by a two-prong, US-style plug and a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector. A green LED indicates when the device is supplying DC power.

Pololu item #: 1691
Price: $15.95

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