Posted on - 6 Comments on ESP32 CoinCell is a Tiny, Coin Cell Powered ESP32 Pico D4 Board

ESP32 CoinCell is a Tiny, Coin Cell Powered ESP32 Pico D4 Board

ESP32 CoinCell

ESP32 boards can easily be powered by batteries, either through an external USB battery shield, or direct connection to an ESP32 board fitted with battery charger circuitry. But Miek Rankin has done something a bit different, as he designed ESP32 Coincell board based on an ESP32 Pico D4 SiP (System-in-Package) powered by a rechargeable LIR2450 coin cell battery with 100mAh capacity. ESP32 CoinCell board specifications: SiP – Espressif Systems ESP32 Pico D4 Wifi/Bluetooth processor Connectivity 802.11 b/g/n WiFi up to 150 Mbps Bluetooth 4.1 LE On-board antenna Display – 0.69″ OLED display with 96×16 resolution USB – 1x micro USB port for charging and debugging (via CP2102N USB to TTL chip) Sensor – LIS3DHTR accelerometer Battery / Power Supply SE5218ALG-LF 500mA LDO power supply SL4054ST25P LiPo battery charger Socket for  for LIR2450 (3.7V/100Mah battery) Consumption – 0.45mA in sleep mode Dimensions – Small If you don’t connect the battery, the board can still be powered through the USB port. No battery …

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Posted on - 26 Comments on iMortor 36V-X Wheel Converts your Bike into an Electric Bicycle for $200

iMortor 36V-X Wheel Converts your Bike into an Electric Bicycle for $200

Electric bicycle wheel

This post will be a little off-topic, but I’ve just found out an interesting product I did not know existed. You’ve probably all seen electric bicycles, but YUNZHILUN iMortor 36V-X wheel allows you to convert your existing bicycle into an electric bicycle with up to 50 kilometers range by simply replacing the front wheel. The electric motor and battery are all built into the wheel, and GearBest sells for $199.99 plus shipping to customers based in Europe. iMortor 36V-X specifications: Wheel Size – 26″ Range – 25km mileage in pure electric power mode. 40 – 50km in “moped power mode” Motor – 30V 240W permanent magnet brushless DC motor Control driver – FOC (field-oriented control) intelligent drive controller Thumb gear shifter with 5 gears Smartphone Connectivity – Bluetooth 4.0 and USB for charging. Battery – 36V 115.2Wh lithium-ion battery Dimensions – 66.00 cm ∅ x 10.00 cm Weight – 11.57 kg Materials – rubber tire, aluminum alloy hub, ABS motor shell, …

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Posted on - 2 Comments on Shelly H&T is a Battery Powered ESP8266 WiFi Temperature & Humidity Sensor

Shelly H&T is a Battery Powered ESP8266 WiFi Temperature & Humidity Sensor

Battery Powered ESP8266 Temperature Humidity Sensor

WiFi and long battery life do not usually go hand-in-hand, but as we’ve seen recently, companies have managed to design battery powered WiFi cameras that are said to last up to a year on a charge. So for simpler WiFi devices it should be feasible to last over a year, and that’s what “Shelly H&T” – an ESP8266 based battery-powered WiFi temperature and humidity sensor has apparently achieved, with claims of up to 16 months battery life. Shelly H&T specifications: Connectivity – 802.11 b/g/n WiFi (Wifi 4) Sensor – Temperature & humidity  Battery – 1x CR123A battery good for up to 16 months Dimensions – 35 mm Ø sphere with flat top/bottom  The firmware supports MQTT, and a Rest API, and works with Alexa, Google Home, and home automation suites like OpenHAB, Home Assistant, or Domoticz. The sensor is “open source ready”, meaning you’ll be able to flash your own firmware through the serial interface as shown below. The device …

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Posted on - 18 Comments on LiFePO4wered/Pi+ is a Safer and Longer Lasting UPS for Raspberry Pi (Crowdfunding)

LiFePO4wered/Pi+ is a Safer and Longer Lasting UPS for Raspberry Pi (Crowdfunding)

LiFePO4wered-Pi+

We’ve already covered several UPS solution for Raspberry Pi boards, but LiFePO4wered/Pi+ is a little different because instead of relying on LiPo (Lithium Ion Polymer) batteries, it comes with LiFePO4 (Lithium Iron Phosphate) battery which are said to be safer and longer-lasting albeit at the cost of lower capacity. LiFePO4wered/Pi+ specifications: Two battery size options: 18650 size – 1,500 mAh 3.2 V LiFePO4 cell with up to 2A max continuous load current 14500 size – 600 mAh, 3.2 V LiFePO4 cell with up to 0.75 A max continuous load current Smart charge controller – Over-charge protection, auto-adjusting charge current, customizable maximum power point (MPP) voltage Smart power manager: I2C communication Power manager and daemon – work together to ensure clean shutdowns and provide over-discharge protection Continuous monitoring – input voltage, battery voltage, output voltage, and load current On/off button Green PWR LED & Red CHRG LED Wake timer – Wakes up RPi as needed for low duty cycle applications. Real-time …

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Posted on - 33 Comments on Pi-Zero-UpTime is an UPS for Raspberry Pi Boards and Clones

Pi-Zero-UpTime is an UPS for Raspberry Pi Boards and Clones

Pi-Zero-UpTime UPS for Raspberry Pi

Since for a headless Raspberry Pi it makes no sense to use a large UPS (Uninterruptible Power Supply) to keep it running in case of power failure,  I bought and tested a Raspberry Pi battery kit a couple of years ago. The kit included an acrylic case,  a battery charging board, and LiPo battery and it worked most of the time as a UPS. “Most of the time” means the switch from mains to battery would not occur fast enough maybe 10% of the time (it depends on the load), so the Raspberry Pi board would reboot. The kit also did not include a GPIO / I2C interface to report the charge level of the battery, so you would not be able to safely power the board when the battery is almost fully depleted. In recent years, it’s become more and more difficult to get batteries shipped from overseas, so a design based on standard batteries like rechargeable 18650 batteries …

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Posted on - 4 Comments on Tri-Panel Waterproof Solar Power Bank Sells for $25

Tri-Panel Waterproof Solar Power Bank Sells for $25

A few years ago, I purchased a power bank with a solar panel, but it only came with a 1.5W panel, and I found it took around 10 to 20 days to charge the 8,000 / 10,000 mAh battery in sunny Thailand, allowing me to charge the phone 4 times. So the rate of charge was not quite enough for self-sufficiency, and while I placed the power bank on a roof outdoors, it was not ideal since it was not waterproof, and I forgot to remove it sometimes when it rained, but it still survived for over two years… Solar power bank are mostly useful if you go outdoors in places without electricity for a few days, or if you have a project that would benefit from being powered that way. Depending on your requirements, a faster rate of charge and waterproofness may be useful features to have and that’s exactly what IPRee waterproof solar panel charger kit offers with …

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Posted on - 5 Comments on Energizer POWERMAX P550S Smartphone Offers up to 20 Days Battery Life with a 5,000 mAh Battery

Energizer POWERMAX P550S Smartphone Offers up to 20 Days Battery Life with a 5,000 mAh Battery

Energizer, the battery company, has now entered in the phone & smartphone business with devices boasting large capacity batteries such as their POWERMAX P550S Android smartphone powered by a Mediatek processor, and equipped with a 5,000 mAh battery promising over 20 days of standby time. Energizer POWERMAX P550S specifications: SoC – Mediatek MT6737 quad core Cortex A53 processor @ 1.3 GHz with Mali-T720MP GPU System Memory – 2GB RAM Storage – 16GB eMMC flash, micro SD slot up to 64GB Display – 5.5″ capacitive touch IPS display with 1280×720 resolution Cellular Connectivity 2G – 850/900/1800/1900 MHz 3G – 900/2100 MHz 4G / LTE – B3/B7/B20 Data / Voice – VoLTE, GPRS, EDGE, HSDPA up to 21 Mbps, HSUPA up to 5.76 Mbps, and LTE up to 150 Mbps downlink / up to 50 Mbps uplink Dual nano SIM card slot Wireless Connectivity – Wi-Fi 802.11 b/g/n, Bluetooth 4.0 LE, GPS with A-GPS, FM radio Camera – 13MP rear camera with …

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Posted on - 3 Comments on Easily Make DIY Battery Packs with this Building Kit for 18650 Batteries (Crowdfunding)

Easily Make DIY Battery Packs with this Building Kit for 18650 Batteries (Crowdfunding)

Vruzend-Battery-Kit-v2.0

If you have a project that requires some serious battery power, and can’t find a battery pack that matches your requirements, making your own is possible, but usually expensive as the commonly used spot welding method requires expensive tools. Vruzend has created a modular lithium-ion battery building kit that greatly ease the making of DIY battery pack using 18650 battery cells using caps, nuts and bolts. There are two versions of the kit: V1.5 kit which supports up to 3.5A continuous and 7A peak per cell, and for higher power levels, the new V2.0 kit can handle up to 20A continuous (25A peak) per cell thanks to nickel plated copper-based conductors. It makes it suitable for EV racing, high power battery banks, and other power-hungry projects. The short video below explains how the kit works. Vruzend battery build kit is now offered on Kickstarter, and the projects has been fairly popular so far with $45,000 raised with 3 days to …

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