App note: How a SIMO PMIC enhances power efficiency for wearable IoT designs

App note from MAXIM Integrated on very compact PMIC using only single inductor to drive three independent switching regulators. Link here Small form factor and minimal power loss are key criteria for internet of things (IoT) hardware, particularly wearables. Meeting these criteria typically involves some tradeoffs. For example, to meet a specific power consumption goal, […]

Povon home energy monitor part 1, 20 channel system

Coyt Barringer documented his home energy monitor project called POVON. This first part of a series will detail the 20 Channel sub-metering hardware: Our initial goal was to monitor power consumption in different parts of the house, and we quickly realized every household circuit would need to be monitored. After some research, small clip on […]

uMesh – A self-contained, battery operated ESP32 module

Jarrett published a new build: I’ve been working on an ESP32 module. Part of the problem I’ve been seeing with inexpensive IoT dev boards, is that the design around the power system hasn’t been very good. Here’s my attempt to fix that. This is a battery-ready module with a proper lithium battery charge circuit, lithium […]

YouTube channel IoT view counter

Kenneth Finnegan built this YouTube channel IoT view counter, inspired by Becky Stern’s IoT counter: I’ve wanted an Internet connected read-out for some time now, inspired by the awesome shadow box IoT projects Becky Stern has been doing (weather, YouTube subscribers). I’m certainly not to the same level of packaging as her yet, but I’ve got […]

Control your Arduino over the Internet using Blynk

John Boxall from Tronixstuff has written an article on using Blynk with Arduino: There are many ways of remotely-controlling your Arduino or compatible hardware over the Internet. Some are more complex than others, which can be a good thing or a bad thing depending on your level of expertise. Lately we’ve become more interested in this topic […]

Soldering iron + Nodemcu = IoT device

Vegard Paulsen blogged about his soldering-iron #IoT project: My trusty old soldering-iron recently got an upgrade! With the help of a NodeMCU. a RGB-LED it now reports the set temperature to the #IoT Thingspeak.com server through WIFI. It also sends me Prowl messages on my Iphone when I forget to turn it off. It all […]

Moteino IoT sprinkler controller automation

Felix of LowPowerLab writes: Another node type is now available on the Gateway automation interface: a sprinkler controller. This is achievable through a board I designed to be able to control many outputs. I call this board IOShield and it features two 74HC595 serial to parallel shift registers. The IOShields are daisy chainable and can […]

Power Meter pulse logger with ESP8266 running NodeMCU

Patrik Thalin writes: This device is installed in my home to monitor the usage of electricity. It counts the pulses from the meter and produces a log file with number of pulses and a time stamp that can later be analyzed. The hardware is quite simple. The NodeMCU development kit board with an ESP8266 running […]

Introducing ESPToy 1.2 (with Lua Firmware)

Ray Wang from RaysHobby has written an article on his ESPToy 1.2, a ESP8266 development board based on the Lua firmware: A little while back I released the very first version of ESPToy — a ESP8266 Development Board with a few useful on-board components like color LED, button, and temperature sensor. It has a built-in […]