3D-Printed RGB Wallet

Stand out from the crowd with this unabashedly ostentatious excuse for a wallet. It's got plenty of space, RGB lights, and you can even put your name on it for added vanity. Interested? Keep reading! In the files section of this build you can find two things: a Fusion archive and some STL files. If you're just interested in printing a blank wallet without any text on it then download the STL files. Load the ...

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The Annoy-O-Bug: A Chirping Light-Up Throwie

Small enough to slip in a mint tin, yet loud enough to be heard across a house at only a few dollars per unit. A nice combination for a pretty good prank! Let's dive in! Step One: The Circuit You can purchase the printed circuit board from OSH Park using the link in the parts section of this build. You by no means need to use an ATtiny or my own printed circuit board. This circuit would take a grand total o ...

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nRF24L01+ with ATtiny85 3 Pins

This would be the continuation of my previous project Programming ATtiny85 with Arduino Uno. Now with cheaper ATtiny85 in place I was looking for cheaper ways to transmit the sensor data. Which brought me to nRF24L01+ a cheap, low power RF transceiver. This seemed to be the better solution for me. But there was one problem, limitation in number pins in ATtiny85. I can't connect both nRF24L01+ and the sensor ...

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A Strange Attraction. Various Hall Effect Sensors

I came pretty close to calling this one “Magnets, How do they work?” But I thought that might confuse more than it would amuse. All jokes aside, hall effect sensors are pretty cool, and also pretty simple to use, but there are a few types you may not know about and I figured it would be a good time to introduce them incase your next project was In need of sensing some magnetic forces. If you don’t know, a h ...

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Simple Temperature With Thermistor + Arduino

A Thermistor is a thermal-resistor. It’s just a simple device that changes it’s resistance based on temperature. If the LRD/Photoresistor is day of of arduino class. The thermistor should be day 1.01. (Can I do that?). If you need precise temperature readings, this is not the part for you. Check out the DS18B20, TMP102, or MLX90614 Thermistors are not that precise or anything, so you wont be able to tell th ...

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Use The EasyDriver Stepper Motor Driver + Arduino

Stepper (or step) motors are really cool. They are perfect for automation or any time you need a motor to turn to a specific point, at a specific speed, in a specific direction. For this article I wont get into why, or how, but unlike typical motors, steppers are able to do all of this, and hold their position when they are not moving – You pay for this by essentially powering them at full power all the tim ...

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Experiments with 2.4″ TFT

Ultimamente tenho andado a testar um display TFT de 2.4" PBC ILI9341 com touch adquirido na ebay por menos de 8euros! Este display gráfico é uma excelente aposta tanto para pequenos projectos como para projectos mais avançados pois inclui a capacidade de leitura de imagens armazenadas em cartão SD. Tem uma resolução de 240x320 RGB. Ler mais: http://ruijc.webnode.com/products/experiencias-com-tft-2-4-experim ...

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Do You Have The Time? DS1307 RT Clock + Arduino

Most microcontrollers are time-agnostic, meaning they are unaware of the time around them, but that’s ok as most things we make have no need for it. But… every once in awhile you come up with an idea that requires knowing the actual time. Mostly this is used for data-logging, or creating this year’s newest clock. (Why do we come up with harder ways to tell time?) But whatever your reason, we have a solution ...

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FLIR TG165 for only 299EUR – it is a bargai!n

f prices of thermal imaging cameras seem to you to be high, but you´d like to take advantage of a graphic temperature displaying, then the TG165 is the right device for you for only 299EUR and limited time. Do not hesitate, this price is valid only18   Now for only 299EUR and limited time. Do not hesitate, this price is valid only in October! Infrared thermometer or infrared camera? A typical dilemma, ...

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Are we getting close? Proximity Sensors + Arduino

In past tutorials, we have covered temperature, color, time, direction, but never distance or proximity. I think I strayed away from this because most of the lower cost proximity sensors are pretty drop-dead-simple to use and thought it might not be that useful. But the time has come, I’m writing about some distance/proximity sensors. While using them is technically simple, I have 3 pretty different sensors ...

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ESP8266 DS18B20 temperature sensor, Arduino IDE, EasyIoT Cloud

In this tutorial we will show how to build WiFi ESP8266 DS18B20 temperature logger connected to EasyIoT Cloud. All material costs less than 5$ on ebay. EasyIoT Cloud works also on mobile phone or tablet. Native Android app is also available. Also see simplified sensor version (Plug and Play): http://www.instructables.com/id/ESP8266-Temperature-Logger-With-Email-Alarm/ Step 1: Materials ESP8266 module DS18B2 ...

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Arduino: Individually Control Shift Register Pins

If you want an article on general 74hc595 shift register usage with detailed explanition on how it works/what it’s doing, you want this article here: http://bildr.org/2011/02/74hc595/ The following code and library are compatible with arduino software 1.0+ ONLY. You can download the newest version of the arduino software here. Earlier this year we did an article on using the 74hc595 shift register with your ...

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