DIY RGB-LED Glow Poi With Remote Control

Introduction Hello Everyone!This is my first guide and (hopefully) the first one in a series of guides on my quest to create an open-source RGB-LED visual poi. To keep it simple first, this is going to result in a simple led-poi featuring remote control via IR and all kinds of colour-change-animations. Keep in mind: This kind of poi (without IR-remote) can be bought for around 20$ on Amazon, so this is not ...

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High Efficiency MPPT Solar Charger

Description After 3 years of development, this open source project is nearing completion. From its modest beginnings it has evolved into a rather sophisticated device with a USB interface, powerful USB charging ports, a 20x4 character LCD, a rotary encoder with push button, precision measurement of everything from voltages and currents to temperatures. There are 4 PWM power outputs, 4MB of storage for a yea ...

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Lipo Charge/Boost/Protect board in 18650 cell holder format

Disclaimer:  The circuit in use here came from GreatScott: YouTube video related to this project: https://www.youtube.com/watch?v=Fj0XuYiE7HU Thanks for the circuit GreatScott, it really works well!  The awesome find of the lipo protection chip with 2.9v cutoff – ruined way too many cells with the DW01’s 2.5v! So, down to business:  We all know the frustration of trying to run portable e ...

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USB Adaptive Charger (2.7A per port) with Wattmeter

Story Why: We built the Pirl Charger because we were unhappy with the quality of existing chargers. Few consumers know they gradually ruin their expensive devices by using poor quality chargers that deliver high noise, high ripple energy. Every consumer device comes with a charger, and those are usually well-built, but they usually have only one port, and if you lose it, you usually buy an aftermarket charg ...

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Arduino Sprinkler Valves + Wifi + Twitter

This is my first post so... be brutal ! I have a small yard with a very odd shape, well... L-shaped really and not enough pressure at the tap to be able to water it in one go. So I had to create 3 sprinkler sub systems that can only be turned on one at a time. I sourced 3 Gardena valves but refused to cough up the extra cash for their dull 'computer' (not sure why they call it a computer btw). Besides, cont ...

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CHARGEST, A TRAVEL ADAPTER TO CHARGE YOUR DEVICES

When you travel, it’s a bit frustrating to fill your luggage with lots of chargers, cables, and adapters to fit your charging needs. In addition to the space it takes which makes it harder to bring every kind of charger you may need. ChargEST is designed to become your charging companion anywhere in the world you might be, so you can power up all your devices with a single accessory. It is compatible with U ...

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BQ25504 Solar Cell LiPo Charger

What is it? This is a small (0.5 x 0.5 inch) breakout board for Texas Instrument's BQ25504 Ultra Low Power Boost Converter with Battery Management for Energy Harvesting Applications. From the datasheet: "The bq25504 device is the first of a new family of intelligent integrated energy harvesting nano-power management solutions that are well suited for meeting the special needs of ultra low power applications ...

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Εfficient Wireless Li-Ion Charger with Regulator Optimized for Low Power Wearables

Analog Devices announces the Power by Linear™ LTC4126, which expands its offerings in wireless battery charging. The LTC4126 combines a wireless powered battery charger for Li-Ion cells with a high efficiency multi-mode charge pump DC/DC converter, providing a regulated 1.2V output at up to 60mA. Charging with the LTC4126 allows for a completely sealed end product without wires or connectors and eliminates ...

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A very simple DIY solar-powered USB charger

I built a very simple DIY solar-powered USB charger for my TP-link 10400mAh USB Power Bank. All I needed was a 6V/3.5W solar panel and the TD1410-based 5V buck converter module. I bought both of them on Aliexpress for less than $8. It was one of the easiest projects I built. All I needed to do was to connect the input of the 5V step-down buck converter to the output of the solar panel using two wires. From ...

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iPhone Battery Charger / Tester

Troubleshooting iPhone problems can be a daunting task sometimes considering how complicated they are. It’s easy to overlook the simple things and on occasion you may replace parts that don’t need replacing. Batteries are no exception. I have seen technicians often replace batteries when they may not necessarily need to be or ignore the fact that they could be the cause of the issue at hand. To remedy this ...

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Baby-Pram Monitoring System

Real time monitoring variables like temperature, X-Y-Z acceleration, sound and light intensity for baby-pram. Things used in this project Hardware components MMA7260 × 1 LM92 × 1 Breadboard (generic) × 1 Electret microphone × 1 Arduino MKR1000 × 1 max4236 × 1 Photocell × 1 Software apps and online services ThingSpeak API Story It is common to see a baby sleeping outside in winter time in Scandinavian countr ...

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Monolithic linear battery charger operates from inputs up to 60V

Introduction For charging relatively low capacity batteries, or maintenance charging backup and keep-alive batteries, linear topology battery chargers are valued for their compact footprints, simplicity and affordability. Even so, there is a dearth of linear chargers that accept a 10V or higher input voltage, leaving many industrial and automotive systems underserved. Some switch mode solutions can accept h ...

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