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Net Speed Indicator Using Dekatron Tube


The author of this project found an old Dekatron tube hooked up to a simple spinner circuit as he is fascinated with the ways of counting and controlling electrons.

His idea was to build something useful like internet speedometer, this Dekatron requires 400V to glow that also drives with AVR with a help of a boost converter. Borrowing the idea of controlling a boost converter with a microcontroller, it built a circuit with the Internet’s favorite thing, the ESP8266 that requires only a 12 volt wall wart and a handful of parts.

This device is an Internet speedometer and read out the Internet speed by using a managed switch that allows SNMP to read the number of incoming and outgoing octets on a network interface. By writing a simple SNMP client for the ESP8266, the device can read how clogged the Intertubes both incoming and outgoing.

Being Cool with Arduino Pedometer Watch


With all the technology around us, you can always go out and buy a smartwatch with a tracker and compass already built-in. This project designer has done and taught us to create one of your own with the use of mighty Arduino.

This Arduino watch can sense direction, count steps, tell temperature and measure altitude. This awesome DIY Arduino watch that uses a GY-87 sensor board that offers three sensors in the form of HMC5883L for the compass, BMP085 for the pressure, altitude, temperature and MPU6050 for the accelerometer and gyroscope.

Although it possessed a steampunkish, the second prototype was able to run for nearly 14 hours. With a few more tweaks to its insides and casing, it is on its way to completing the watch that boasted a battery life of at least a day.

Another DIY AC Wattmeter


Remember that almost every device you can plug into the wall has a label or engraving that tells you how much energy it uses. But if you want to measure the energy use yourself, you can definitely do that by assembling your own wattmeter.

The exact details of how this is accomplished may differ, since there are many ways one may consider to design and implement such a device, but the basic idea is the same. Electricity is passed from the wall outlet through a fuse and through a current sense resistor. Attached to the current sense resistor is a small circuit which amplifies the very small current coming from the sense resistor into a voltage which can be read by a microcontroller.

The LCD display used in this project was salvaged from a printer. The module consists of a display which has two lines of 16 characters and 6 buttons and controlled by i2c.

Wireless AC Dimmer Known as Raptor12

Have you ever wondered of applying the same concept of regulators or dimmers using a microcontroller? If you haven’t, don’t worry, this project deals with the same stuff.

We all know what an AC dimmer is, for those who don’t, it’s a kind of a circuit which can control the amount of AC voltage to be given to any device. This project is wireless using NRF24l01 Modules spi interface while the 12 channel controller with the ac light controller requires only a few components detecting zerocross, microcontroller, and a way to control high voltage mains. Most controllers use a standard 6v transformer and an lm7805 regulator. The enclosure or case can be bought in the DIY store.

The construction of the light dimmer is very simple because the Raptor12 board is quite compact in order to facilitate the replacement of existing switches.

How the E-Paper Clock was Built


If you’ve never heard about electronic paper, it is a flexible display made of color-changing beads that mimic ink-on-paper for easy daylight reading. The revolutionary thing about e-paper is that after its set, it stays that way without additional power.

The author of this project bought mostly of his parts in Sparkfun, in time to finish his switches and connectors while waiting for his board to arrive. Originally, he wanted this project to be smaller and lighter and adding some features like temperature sensor, speaker and alarm functions. He also built in a USB battery charger to make it easier to charge it and planning to prolong the battery life.

Now everybody can afford to build an e-paper display being super thin and super light; no more than a display and a PCB tightly sandwiched between some acrylic.

Integrating Arduino to ESP8266 Weather Station


This project uses the ESP8266 and Arduino to update a remote server using a digital temperature sensor. It was set-up in the breadboard and ends up in stripboard layout with a need of software package.

It’s just a simple weather station who collects each hour the temperature, humidity, room brightness, altitude, barometric pressure, and do also compass. The weather station can be controlled manually from the board and also from a secured web panel and needs internet.

The ESP8266 runs on Nodemcu and does the Internet connection. The Arduino does all the sensor related things. The communication between Arduino and ESP8266 is via serial connection whereby the Arduino uses the Software Serial Library. There are two modes in the Arduino software: standard and low power.

WiFi Enabled Traffic Light Built Around Arduino


This project will be of particular interest to you if any of these apply such as; you have a stoplight that you wish could be controlled by a web browser and you have a red, yellow and green light updates through remote source.

The author’s goal was to make this device wireless only by using WiFi shield in his Arduino. And he simply added a separate board to give way for the chip to switch the AC lights and use the WiServer library which controls the CoperHead WiFi Shield and gives him the ability to serve simple web pages from the Arduino. When power is applied the sketch automatically connects to the AP and starts polling the company’s API for status data

The author is kind enough to provide the instructions and the source code if you wanted to build your own or something similar together.

Speech Synthesizer Integrated with Arduino


When using the Arduino to do robot or interactive projects, is it nice to have them speak? The Speech Synthesis Shield for Arduino makes it an easy way to give voice to your robots and projects.

This project was just made up with simple parts such as talkie library, a switch, a photocell and lastly, the designer’s homemade amplifier. He wanted to make this project interesting and fun while talking and interacting. The circuit diagram was so simple to follow and you will need a speaker and optional amplifier that are connected to pin 3 and ground.

Each of the four circuits can be used on its own. The Talkie download comes with a lot of example speech which you can use in your Arduino program so you have to make your own speak for talkie.