Thundercatch IoT Network

Monitor lightning activity and get alerted on dangerous situations. Story Introduction Lightning is a phenomenon that always attracted man’s interest. Reasons behind this are the danger as a consequence of a lightning stroke on the negative side and the visual part which many people find it beautiful on the positive side. Regarding the first part (i.e. the danger), sensing a lightning event from a distance ...

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VXO – based PLL frequency synthesizer for 7 MHz

Greetings! In EMRFD, 4.10, Wes provides the schema for a versatile VXO - extending frequency synthesizer. Although, I referred him to Wes for help, a reader asked me some questions and I ended up designing some pieces for him. In order to test some of my ideas, I made a VXO - based synthesizer that tuned from 6.99 to 7.103 MHz using only parts I had in stock. For those interested, here's some project schema ...

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The Ugliest Sweater

In the maker world, only boredom is truly ugly. Prevent boredom with horrible, smart flashy lights!!! Story This sweater likes to have stuff going on around it! Right now, anyone can give it a "poke" – and if it hasn't heard anything in a while, it starts flashing its red LEDs around the "BORED" text, faster and faster. I bought this sweater two years ago as a potential victim for my first holiday hack. I s ...

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Memory upgrade for ESP8266

Some time ago I passed comment in here about converting an ESP-01 to 32Mb (or 4MB). And here it is in the flesh – a 32Mb ESP-01 – and also – at last - Sonoff Upgrades. Now, why would you want to do all of that? I would suggest only if you happen to have lots of ESP-01 units lying around – and I’ll bet quiet a lot of you do. As for the Sonoffs – well, put it this way, I just ordered another 10 chips! I stopp ...

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Wifi-Controlled Precision Camera Slider

A wifi-connected high-precision camera slider, controllable from any web browser. Easily capture smooth sliding video shots or time lapses. Story My name is Ben Brandt, and I run a YouTube channel as a hobby to share my various DIY projects (like this one) as well as woodworking, metal work, and making things in general. In my quest to make better video, I wanted to be able to make long sliding/panning shot ...

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Alexa Controlled Door Sign Demo

Use Alexa to tell your door sign what message to display. Story Why? You are running a small "geek shop" and want to impress the first/last customer of the day? You want to leave your desk for a short break and think telling that to your colleagues - and to Alexa - should be enough effort (why should you leave a note)? Or just to show the world how cool you are? Or just for fun? ;) Introduction & Discla ...

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HC-12 433MHz wireless serial communication module configuration

Description HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect sensors. Or whatever else one can think of. It is based on SI4463 RF chip, has build in microcontroller, ...

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Liquid Laundry Detergent DRS Sensor (LaundryBot)

Never run out of liquid laundry detergent again with this Amazon DRS enabled liquid laundry detergent sensor, a.k.a. LaundryBot. Story Introduction The LaundryBot is a Amazon Dash Replenishment Service (DRS) enabled smart liquid level sensor that will contentiously measure the surface height of the liquid detergent in the container, and automatically re-order through Amazon DRS service when the detergent is ...

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Optogenetic hardware setup

Arthur English's group at Emory has developed a custom device that they have used for stimulating peripheral nerves optically in anesthetized mice using a standard optical fiber. The device is compact, rechargeable battery-operated, and controlled either manually or by computer using an analog input. Essentially, laser LED illumination is coupled to an optical fiber by a collimator and can be attached to a ...

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SmartQ Notification with Azure IOT Hub and Virtual Shields

Waiting hours in queue is history, SmarQ will update you the current queue status and alarm you when it is almost your turn to be served. Story Waiting hours in queue for your turn to be attended is a waste of time.  SmarQ allows you to take a queue number with a press of button. You can go away for a while to do other business in the middle of the waiting. SmarQ will update you the current queue status and ...

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Arduino 50V digital Voltmeter using MAX7219

Abstract The Arduino inbuilt 10 bit ADC, can be used for constructing / measuring the 0Volt to 50Volt Digital Volt Meter. Popular MAX7219 display driver, connected with Arduino Uno will be used for displaying the measured voltage. This voltmeter can read only DC voltage. Parts and components Arduino Uno board Max7219 4 Digit 7Segment Common cathode displays = 1 Nos Or Max7219 assembled board Resistor 27 K = ...

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Make SMART Your Washing Machine

If also you, like me, put your vest on the washing machine and wait the best moment for wash the clothes... make SMART your Washing Machine. Story If also you, like me, put your vest on the washing machine and wait if is the best moment for wash the clothes, also you have a problem... like me. The best moment for me is when the cost of electricity is low, in Italy this happens at certain hours of the day, w ...

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