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Power, Batteries and Voltage Regulators

 
 

   

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  1. Breadboard Power Supply 5V/3.3V

    Breadboard Power Supply 5V/3.3V

    $11.88

    A very simple breadboard power supply kit that takes power from a DC wall wart and outputs a selectable 5V or 3.3V regulated voltage. The .1" headers are mounted on the bottom of the PCB for simple insertion into a breadboard. Pins labeled VCC and GND plug directly into the power lines. The lone pair of pins have no electrical connection but help support the PCB.

    There are two pins available within the barrel jack footprint. Any stripped +/- DC supply can be connected instead of the barrel connector. Board has both an On/Off switch and a voltage select switch (3.3V/5V).

    Comes as a bag of parts kit and is easily assembled if you can follow the silkscreen indicators and have beginning experience with a soldering iron. You will need to read the resistor bands or use a multimeter to determine the resistor sizes.

    Kit Contains:

    • DC Barrel Connector (2.1mm center positive)
    • TO-220 Voltage Regulator (LM317 1.5A max current)
    • 1N4004 Reverse Protection Diode
    • 100uF 25V Capacitor
    • 10uF 25V Capacitor
    • 0.1uF 50V Capacitor
    • Red Power LED - High Brightness
    • 2pcs SPDT Slide Switch
    • 4pcs 0.1" Header Pins
    • 2pcs 330 Resistor 1/6W
    • 390 Resistor 1/6W
    • 240 Resistor 1/6W
    • Bare PCB with Silkscreen Indicators

    Documents: Schematic
    Dimensions: 1.25x1.25"

    Learn More
  2. Polymer Lithium Ion Batteries - 1100mAh

    Polymer Lithium Ion Batteries - 1100mAh

    $14.17

    Out of stock

    These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cell outputs a nominal 3.7V at 1100mAh! Comes terminated with a standard 2-pin JST connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium Polymer charger.

    Battery includes built-in protection against over voltage, over current, and minimum voltage.

    Features:
    • 2C continuous discharge
    • Excellent long-term self-discharge rates (<8% per month)
    • Robust power source under extreme conditions (-25 to 60C)
    Dimensions: 0.23x1.32x1.86" (5.8x34x47mm)
    Weight: 22g (0.77oz)

    Documents:
    UnionBattery-1000mAh.pdf Learn More
  3. Polymer Lithium Ion Batteries - 860mAh

    Polymer Lithium Ion Batteries - 860mAh

    $12.75

    These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 860mAh! Comes terminated with a standard 2-pin JST connector - 2mm spacing between pins. These batteries require special charging : Do not attempt to charge these with anything but a specialized LiPo charger.

    Battery includes built-in protection against over voltage, over current, and minimum voltage.

    Features:
    • 2C continuous discharge
    • Excellent long-term self-discharge rates (<8% per month)
    • Robust power source under extreme conditions (-25 to 60C)

    Dimensions: 0.23x1.16x2.0" (5.84x29.5x51mm)

    Weight: 18.5g (0.65oz)

    Documents: UnionBattery-860mAh.pdf Learn More
  4. NCP1400-5V Step-Up Breakout

    NCP1400-5V Step-Up Breakout

    $11.35

    The NCP1400 is a 5V DC-DC converter. The breakout board will accept voltage inputs between 1 and 4 Volts and output a constant, low ripple 5V output capable of sourcing up to 100 mA. This board is great for supplying power to 5V sensors on a 3.3V board, or providing 5V from a AA battery.

    The breakout board includes the necessary peripheral components. The input, ouput and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard.

    Documents:
    Learn More
  5. Pololu Adjustable Boost Regulator 4-25V

    Pololu Adjustable Boost Regulator 4-25V

    $19.95

    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.

    Overview

    The Pololu adjustable boost regulator is a very flexible switching regulator (also called a switched-mode power supply, SMPS, or DC-to-DC converter) that can generate voltages higher than its input voltage. The output voltage can be set using the trimmer potentiometer in the upper-right corner of the board. The input voltage range is 1.5 V to 16 V (the input voltage should be kept below the output voltage). The integrated 2 A switch allows for output currents high enough to drive small motors, as in our 3pi robot, and allows large voltage gains, such as obtaining 24 V from two NiMH or NiCd cells.

    Note: For high-volume applications, this product can be customized with fixed output voltages ranging from 2 V to 30 V.

    Some example applications include:

    • Powering 5 V or 3.3 V systems from lower-voltage batteries.
    • Powering 5 V subsystems (e.g. sensors) in lower-voltage (e.g. 3.3 V) systems.
    • Achieving consistent actuator operation when powered by fluctuating batteries
    • Powering high-brightness LEDs or a large number of LEDs in series

    Feature summary

    • input voltage: 1.5 V to 16 V
    • output adjustable from 4 V to 25 V
    • 750 kHz switching frequency
    • 2 A switch (and input) limit
    • integrated over-temperature and over-current shutoff
    • typical efficiency of 80-90% when doubling voltage and with 100-500 mA output
    • small size: 10.7 x 22.4 x 5.8 mm (0.42" x 0.88" x 0.23")
    • weight without header pins: 1.6 g (0.06 oz)

    Using the Boost Regulator

    Connections

    The boost regulator has just three connections: the input voltage, ground, and the output voltage. These three connections are labeled on the back side of the PCB, and they are arranged with a 0.1" spacing along the edge of the board for compatibility with solderless breadboards, connectors, and other prototyping arrangements that use a 0.1" grid. You can solder wires directly to the board or solder in either the 3×1 straight male header strip or the 3×1 right-angle male header strip that is included.

    Setting the output voltage

    The output voltage can be adjusted using a meter and a light load (e.g. a 1k resistor). Turning the potentiometer clockwise increases the output voltage. The output voltage can be affected by a screwdriver touching the potentiometer, so the output measurement should be done with nothing touching the potentiometer. The potentiometer has no physical end stops, which means that the wiper can be turned 360 degrees and into an invalid region in which the output voltage is set to approximately 2.5 V (for both the 2.5 V to 9.5 V and 4 V to 25 V versions). The input voltage should not exceed the output voltage, so we recommend setting the output voltage with the input voltage set to around 2.5 V.

    The absolute limit for the input voltage is double the output set voltage. For example, if the output is set to 6 V, the input must not exceed 12 V. Once the input exceeds the output set point, the output voltage will rise with the input voltage since the input is connected to the output through an inductor and a diode.

    Note: The trimmer potentiometer is not rated for continual adjustment back and forth; the intended application is to set the output voltage a few times in its life.

    Efficiency and available output current

    The available output current depends on the input and output voltages. The input current is limited to approximately 2 A, and the efficiency is typically 80%. Therefore, the maximum available current will be approximately 800 mA when doubling the input voltage and approximately 400 mA when quadrupling the input voltage. At high output powers, the 20% lost in the regulator will cause substantial heating, which can limit the available output power (the regulator will automatically shut off if its internal temperature gets too high). At low output currents and high input and output voltages, the efficiency drops closer to 50%, though the lower power involved prevents heating from being an issue.

    Learn More
  6. Pololu 5V Boost Regulator NCP1402

    Pololu 5V Boost Regulator NCP1402

    $10.95

    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.

    Overview

    This tiny boost switching regulator is based on the NCP1402 boost regulator IC. The tiny dimensions of just 0.33" x 0.5" (8.4 x 12.7 mm) and a startup voltage of down to 0.8 V make it easy to build 5 V circuits that are powered by lower battery voltages. The available output current and output voltage ripple depend on the input voltage. With a 0.8 V input, approximately 5 mA are available before the output voltage begins dropping. The full 200 mA output can be realized from input voltages over approximately 2.7 V. With low input voltages, the output voltage ripple is under 40 mV peak-to-peak; close to 5 V, the output ripple quickly climbs to 150 mV peak-to-peak. Therefore, adding capacitance from the output to ground is recommended for noise-sensitive applications with input voltages close to 5 V.

    Some example applications include:

    • Powering 5 V systems from lower-voltage batteries.
    • Powering 5 V subsystems (e.g. sensors) in lower-voltage (e.g. 3.3 V) systems.

    Using the Boost Regulator

    The boost regulator has just three connections: the input voltage, ground, and the output voltage. These three connections are labeled on the back side of the PCB, and they are arranged with a 0.1" spacing along the edge of the board for compatibility with solderless breadboards, connectors, and other prototyping arrangements that use a 0.1" grid. You can solder wires directly to the board or solder in either the 3×1 straight male header strip or the 3×1 right-angle male header strip that is included.

    Feature summary

    • operating voltage: 0.8 V to 5.0 V
    • 5.0 V output with 2.5% accuracy
    • small size: 8.4 x 12.7 x 3.8 mm (0.33" x 0.50" x 0.15")
    • weight without header pins: 0.6 g (0.02 oz)
    Learn More
  7. Polymer Lithium Ion Batteries - 2000mAh Molex Connector

    Polymer Lithium Ion Batteries - 2000mAh Molex Connector

    $18.95

    These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 2000mAh! These cells come terminated with a standard 2-pin Molex connector. Do not attempt to charge these with anything but a charger specifically designed for Lithium Ion batteries.

    Features:
    • 2C continuous discharge
    • Excellent long-term self-discharge rates (<8% per month)
    • Robust power source under extreme conditions (-25 to 60C)

    Dimensions: 0.23x2.1x2.1" (5.8x54x54mm)

    Weight: 36g (1.27oz)

    Documents: UnionBattery-2000mAh.pdf

    Learn More
  8. Solar Module DC Power Source

    Solar Module DC Power Source

    $15.95

    This is a small solar power module designed to plug directly onto the MSP development boards but can be used with any 3.3V system. This includes a small solar panel and a AA battery holder. Perfect for low power projects that need rechargeable 3.3V power.

    Includes cable as shown.

    Features:
    • SOLAR PANEL 2.4VDC 80mA with DC/DC voltage boost converter
    • JTAG connector for direct plug in MSP430 2x7 JTAG connector to provide power for the target board
    • Suitable AA sized rechargeable batteries
    Dimensions: 56x48 mm (2.2x1.9")

    Documents:
    Learn More
  9. Breadboard Power Supply USB - 5V/3.3V

    Breadboard Power Supply USB - 5V/3.3V

    $11.05

    A very simple breadboard power supply kit that takes power from any USB port and outputs a fuse protected and regulated 3.3V. The .1" headers are mounted on the bottom of the PCB for simple insertion into a breadboard. Pins labeled 5V/GND 3.3V/GND plug directly into the power lines.

    Please note: The current version of the board has a disconnected 5V rail. This pin doesn't do anything. The board can only be used for 3.3V output. We have fixed it on the next rev and will update the kits as soon as the boards come in.

    When you plug this board into a breadboard you must be aware that the unused power and ground pins will short if they are inserted into a bread board row. To avoid this problem, orient the board so that the unused power pins are left off the side of the breadboard. You can also orient the board sideways and utilize both 5V and 3.3V at the same time.

    USB v2.0 specifies a max of 500mA at 5V. The on-board fuse limits the current to 500mA. Board has a handy On/Off switch.

    Comes as a bag of parts kit and is easily assembled if you can follow the silkscreen indicators and have beginning experience with a soldering iron. You will need to read the resistor bands or use a multimeter to determine the resistor sizes.

    Kit Contains:

    • USB type B connector
    • TO-220 Voltage Regulator (LM317 1.5A max current)
    • PTC Resettable Fuse
    • 100uF 35V Capacitor
    • 10uF 25V Capacitor
    • 0.1uF 50V Capacitor
    • Power LED
    • SPDT Slide Switch
    • 4pcs 0.1" Header Pins
    • 330 Resistor 1/6W
    • 390 Resistor 1/6W
    • 240 Resistor 1/6W
    • Bare PCB with Silkscreen Indicators

    Documents: Schematic
    Dimensions: 1.25x1.25"

    Learn More
  10. Polymer Lithium Ion Batteries - 2000mAh

    Polymer Lithium Ion Batteries - 2000mAh

    $15.49

    These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 2000mAh! These cells come prepped with connection wires and require special charging. Do not attempt to charge these with anything but a specialized LIPION charger.

    Features:
    • 2C continuous discharge
    • Excellent long-term self-discharge rates (<8% per month)
    • Robust power source under extreme conditions (-25 to 60C)

    Dimensions: 0.23x2.1x2.1" (5.8x54x54mm)

    Weight: 36g (1.27oz)

    Documents: UnionBattery-2000mAh.pdf



    Learn More
 
 

   

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