SparkFun Battery Babysitter
https://www.electronics-lab.com/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 pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The […]
Dynamic-load circuit determines a battery’s internal resistance
https://www.electronics-lab.com/dynamic-load-circuit-determines-a-batterys-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 milliohmmeter containing a kilohertz-range ac excitation source to measure a battery’s internal […]
Running NodeMCU on a battery
https://www.electronics-lab.com/running-nodemcu-battery/
ESP8266 low power consumption revisited: Using Wi-Fi is a convenient way to link your newly created IoT device into your existing IT infrastructure – including cloud services – but it also has a drawback. Wi-Fi’s demand for power usually makes battery operation impractical for any real deployment. I have been able to get around this issue for most of my […]
Battery-charging considerations for low-power applications [PDF]
https://www.electronics-lab.com/battery-charging-considerations-low-power-applications/
By Tahar Allag: The wearable and personal-electronics industries are booming. Devices in this market vary wildly by application and use. These multifunction devices are designed to help people in their daily activities and make their lives comfortable. They can be found in different shapes, colors, sizes, and safety measures. They may differ significantly from each […]
Rechargeable batteries with nanowires last forever
https://www.electronics-lab.com/rechargeable-batteries-nanowires-last-forever/
by Harry Baggen @ elektormagazine.com: Researchers at the University of California (USA) have developed a nanowire-based material that allow a rechargeable battery to be charged and discharged hundreds of thousands of times without any loss of capacity. This would virtually eliminate the need to replace a battery made from this material during the lifetime of the […]
AmpStrike – Battery Powered Bench Power Supply
https://www.electronics-lab.com/ampstrike-battery-powered-bench-power-supply/
This is a small bench power supply that is powered by two lithium-ion batteries. The project was inspired by Dave Jones from EEVblog but the design is completely mine. The voltage range is 0-20V regulated in 10mV steps and maximum current is 1A with current limit set in 1mA steps. The power supply runs on […]
LiFePO4wered/Pi – LiFePO4 battery for Raspberry Pi
https://www.electronics-lab.com/lifepo4weredpi-lifepo4-battery-for-raspberry-pi/
Patrick Van Oosterwijck has published a LiFePO4 battery solution for Raspberry Pi that will also act as UPS power supply: The project is built on top of a LiFePO4wered/USB module. A small board is added with an MSP430G2131 microcontroller that takes care of monitoring input and output voltage, monitoring a PCB touch button, driving a power […]
ATMEGA328 based Weather Station
https://www.electronics-lab.com/atmega328-weather-station/
Vlad @ denialmedia.ca has build a solar powered weather station based on ATMega328 microcontroller that is able to measure temperature, a humidity, and UV radiation and it uploads measurement on WeatherUnderground network. The data are send to the air using a 433MHz link. The sensors used are DHT22, ML8511, BMP180 and a TP4056 charger IC is used to […]
Smart Battery Charger
https://www.electronics-lab.com/smart-battery-charger/
gfwilliams @ instructables.com has build a smart battery charger that is able to individually charge each battery , automatically discharge them and give you an idea of their capacity. The charger is controlled by an Espruino Pico and results are displayed on a Nokia 5110 LCD display. If you’re anything like me you’ll end up […]
LTC4123 – Low Power Wireless Charger
https://www.electronics-lab.com/ltc4123-low-power-wireless-charger/
Linear Technology Corporation introduces the LTC4123 to further expand its offerings in wireless battery charging. The LTC4123 combines a 30mW wireless receiver with a constant-current/constant-voltage linear charger for NiMH batteries, such as Varta’s power one ACCU plus series. An external resonant LC tank connected to the LTC4123 enables the IC to receive power wirelessly from […]