SunDuino – Run your C application using solar power
Mcu

SunDuino – Run your C application using solar power

SunDuino is a Single Board Computer with integrated Battery Charger, Voltage Regulators, I2C, Digital and Analog IO. It's main benefit is that it can run a compiled C app for years on a small battery or forever using built in solar charger. A background RTOS provides SLEEP...

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DIY USB power bank from laptop battery
DIY

DIY USB power bank from laptop battery

A DIY USB power bank made from an old laptop battery @ DoItYourselfGadgets: A situation many can relate to: an empty smartphone battery and no outlet around! That’s exactly why I recycled an old laptop battery into an USB power bank. This article will show you the basic powerbank...

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Disconnect circuit for 12 volt lead acid and lithium batteries
Power

Disconnect circuit for 12 volt lead acid and lithium batteries

KA7OEI designed a circuit that disconnects the battery when it over-discharges. He writes: The avoidance of overcharging is usually pretty easy to avoid: Just use the appropriate charging system – but overdischarge is a bit more difficult, particularly if the battery packs in...

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Not a battery or a supercap, but a ‘thin laminate energy device’
Power

Not a battery or a supercap, but a ‘thin laminate energy device’

Murata’s UMAL is a low-profile high capacity energy device. Designed to meet the demand for a slim high capacity energy source with a maintenance-free extended life cycle in wireless sensor nodes, the UMAL has charge/discharge and life-cycle characteristics superior to conventional...

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Build an Arduino boost converter
ArduinoPower supply

Build an Arduino boost converter

Lucas Reed has a tutorial on how to build a boost converter using an Arduino. Have you ever needed to power a project that's not near an outlet? Have you needed to test using different voltages? Are you curious about analog circuits and power? Using Autodesk Circuits and a lead-acid...

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Maximize the Energy from Long-Life Batteries
Power

Maximize the Energy from Long-Life Batteries

by digikey.com: Battery lifetime is a key consideration for the development of the wireless sensor nodes that will populate the Industrial Internet of Things (IIoT). In many applications, the sensor nodes will need to be installed in locations that are difficult to reach let alone...

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SparkFun Battery Babysitter
Test/Measurements

SparkFun Battery Babysitter

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively. The Battery Babysitter features a...

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Dynamic-load circuit determines a battery’s internal resistance
Test/Measurements

Dynamic-load circuit determines a battery’s internal resistance

by Jim Williams @ end.com The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value—often a few milliohms—depends on the battery's electrochemical condition and construction. If you attempt to use an ordinary ac...

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