Fish Feeder 2

Introduction / Why this project In 2016 I build my first fish feeder, see Fish Feeder 1. The feeder worked fine for more then half a year. After that period the servos were worn out, causing the program to halt, without sending an error-mail. Oops. I didn’t had the time to correct this fault, because the aquarium was replaced by a slighter bigger version (Juwel Rio 125). Although the Fish Feeder 1 ...

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Arduino Milliohm Meter

This is an accurate milliohm meter with a maximum resolution of 0.1mOhm. The design is very simple, the whole assembly can be built in a couple of hours once all the parts are gathered. It is based on a precision current sink and a high-resolution ADC controlled by an Arduino Nano V3. It uses a Kelvin connection with the resistor under test to exclude the resistance of test leads from the measurements. It c ...

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70W soldering iron controller

Theory of operation In series thermocouple soldering iron have a thermocouple in series with their heating element and thus only have two connections (actually one more which is electrically connected to the tip for ESD purposes). When a voltage is applied to the two terminals the tip heats, when unpowered the thermocouple voltage can be read. This controller uses a skipped variable puls modulation to keep ...

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TIME SYNC THROUGH YOUR VGA CONNECTOR

While it might be in its twilight years, the venerable VGA video connector conceals a versatile interface that  can still provide the experimenter with the opportunity for a variety of hacks. We’ve not seen anything quite like [flok]’s one, in which he uses the VGA interface to insert timing information from which an NTPd instance gets its reference. If this seems counter-intuitive because a VGA i ...

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How to Use the Adafruit Flora Board – Arduino Tutorial

In this tutorial you will learn how to use the Adafruit Flora board and how you can easily program it with Codebender! FLORA is Adafruit's fully-featured wearable electronics platform. It's a round, sewable, Arduino-compatible microcontroller designed to empower amazing wearables projects. The FLORA family also has the best stainless steel threads, sensors, GPS modules and chainable LED NeoPixels, all are w ...

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AN ARDUINO PRO MICRO WITH USB-C

USB-C versus USB Micro connectors are turning into one of the holy wars of our time. Rather than be left on the wrong side of the divide [Stefan S] has come up with his own USB-C version of of an Arduino Pro Microto avoid having to always find a different cable. Home made Arduinos come in all shapes and sizes from the conventional to the adventurous, and from the pictures it seems that this one is firm ...

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ARM-Android open source platform for Linaro By Huawei

A development platform for the Android open source project (AOSP) has been created by Huawei. The ARM-based hardware is part of the Linaro open source collaborative engineering organization developing software for the ARM ecosystem. Recently, Huawei has launched the HiKey 960 96Boards development platform to provide access to the latest ARM mobile technology for AOSP developers. Fortunately, You can find th ...

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Bluey, BLE Development Board Supports NFC

Development boards are assistant tools that help engineers and enthusiasts to become familiarized with hardware development. They simplify the process of controlling and programming hardware, such as microcontrollers and microprocessors. Electronut Labs, an embedded systems consulting company, had produced its new BLE development board “Bluey” with a set of useful sensors and NFC support. Bluey is an open s ...

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Cloom Published an “Electrical connector–Everything You Need to Know”

https://www.wiringo.com/electrical-connector-everything-you-need-to-know.html Cloom, a reliable wire harness, and cable assemblies manufacturer, today published an “Electrical connectoe–Everything You Need to Know.” It has four chapters that cover some useful terms about Electrical connector knowledge. The publication is available here for free. This guide sheds insightful light on these electrical connecto ...

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Making A Pickit 3 Clone

After using the Microchip tools to program and debug the projects I work on, I wondered about creating my own programming/debugging module that I could put on my own boards – just like Microchip does with their starter kits and such. As I became more interested in that idea, I began to search the web to see if anyone else had already done something similar. Initially, I found lots of posts regarding the 2nd ...

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DIY IKEA Wireless Qi Charging

The Achilles Heel of the Mikroelektronika Hexiwear is its charging: the charging and USB connector are only designed for a limited number of plug-unplug cycles, and it does not have a wireless charging capability like the Apple iWatch. Until now! I have built a DIY wireless charging system for the Hexiwear 🙂 : Wireless Qi Charging? IKEA!!!! I have been experimenting with wireless charing for a few weeks, in ...

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MKRZero, Arduino Newest Family Member

Arduino had announced a new member of its family: MKRZero! This new board comes with the size of 61x25mm MKR1000 board and the power of ARM-core Arduino Zero. The ARM-core board consists of an on-board SD connector with dedicated SPI interfaces (SPI1) that make it easy to browse your files with no extra hardware. You can power your MKRZero using a micro-USB cable or a LiPo battery, but you should pay attent ...

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