4 Ways to Feed Power to an Arduino

Arduinos are really useful and are compatible with almost all electronic components, but like all devices they need to be fed. And there are many ways to do that!This instructable is all about feeding power to Arduinos and drawing power from them ( to get regulated 5 or 3.3v DC ) . CLICK ON THE I...
By: Arbormakes

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Instructables 18 Mar 08:48

Voice Controlled Scooter Lights and Garage Door

Hello Everyone!I recently bought an electric scooter but it didn't have a rear light nor did it have an inbuilt garage door opener...SURPRISE!! (ノ゚0゚)ノ~So, I decided to make my own garage door remote and rear lights instead of buying them.What's the fun in having buttons for opening a garage door?! ...
By: SahilParikh

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Instructables 18 Mar 03:01

Vintage Atari Becomes Modern Keyboard

The modern keyboard enthusiast is blessed with innumerable choices when it comes to typing hardware. There are keyboards designed specifically for gaming, fast typing, ergonomics, and all manner of other criteria. [iot4c] undertook their own build for no other reason than nostalgia – which sounds plenty fun to us.

An Arduino Leonardo is pressed into service for this hack. With its USB HID capabilities, it’s perfectly suited for custom keyboard builds. It’s built into a working Atari 65XE computer, and connected to the keyboard matrix. The Keypad and Keyboard libraries are pressed into service to turn keypresses on the 80s keyboard into easily digseted USB data.

There’s plenty of room inside the computer for the added hardware, with the USB cable neatly sneaked out the rear. [iot4c] notes that everything still works and the added hardware does not cause any problems, as long as it’s not used as a computer and a keyboard at the same time.

It’s possible to do a similar hack on the Commodore 64, too. If you’re doing tricky keyboard builds yourself, you know where to send ’em.

Smart Coffee Table

Hi Makers, We are in the joy of making a project that has been in our mind for a long time and sharing with you. Smart Coffee Table. Because this table is really smart. It illuminates your environment according to the weight of your drink. We are in the joy of making a project that has b...
By: TheTNR

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Instructables 17 Mar 20:29

Debugging the IN-17 Nixie clock (aka "Rothko clock")

This weekend I felt like doing something, which rarely happens lately. From the pile of semi-failed ("started but not finished", "finished but not working", "not fully functional" etc.) I picked the Nixie clock with 6 IN-17 tubes. Its problem was that it did not display any 6 nor 7, on all tubes. A quick check with the meter showed, indeed, a short between 2 neighbor pins. Upon visual inspection (not as easy as it used to be) and with a lot of luck (and magnification), I found the culprit: one tube in the middle of them all had two pins crossed (inverted), as shown in the photo below.




Here is the board with the IN-17 removed.


Since it was impossible (at least for me) to re-insert the old short-pined IN-17 (because of the tight space), I had to use a new one. Everything was well in the end.

Now onto the usability of this pretty Nixie clock. The only way to set the time is to send commands from a Bluetooth device (phone, tablet). This is not very "user friendly", nor quick, is it? The obvious "remedy" to this situation was to add a couple of buttons on top, where they can be easily pressed. As you may know from my old post, the high voltage (170V) for powering the IN-17 tubes is generated in the same top-of-the-board area, definitely not a good place for fingers. The solution was to use a longer piece of prototyping PCB to cover the danger zone.


As in most simple clocks, the right button increments the minutes, the left one increments the hours, while the seconds are always reset.

I also added a hardware "12 hour mode" through the use of a jumper placed at the bottom of the board:


With the jumper off, the clock shows military time (the hours between 0 and 23).

Unlike the first version, this new Nixie clock (I shall name it "Rothko clock" from now on) uses just 2 boards: wsduino (with on-board RTC and XBee support) and the Nixie shield itself. The 2-button hack should be made somehow permanent, probably by adding them onto the Nixie shield, similar to the LED matrix mini display shield used in the Mondrian clock. Also note that the alarm feature won't work (although implemented in the code, shared here) since there is no buzzer. Bluetooth should still work with a BTBee module plugged into its wsduino socket.

Wise time with Arduino 17 Mar 20:16

Repurposing an LED RF Remote to Control "anything"!

In this project I will show you how to repurpose an LED RF remote in order to control pretty much anything you want with it. That means we will have a closer look at the transmission process of the RF remote, read in the sent data with an Arduino µC and use it to control a solid state relay. This wa...
By: GreatScottLab

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Instructables 17 Mar 17:02

arduino based accident alert system

I need circuit connection photos properly because tried so much but still my project is not working i dont know how to connect it properly 

Circuit Digest 17 Mar 13:06

Alma The Talking Dog Might Win Some Bar Bets

Students at the University of Illinois at Urbana-Champaign have a brain-computer interface that can measure brainwaves. What did they do with it? They gave it to Alma, a golden labrador, as you can see in the video below. The code and enough info to duplicate the electronics are on GitHub.

Of course, the dog doesn’t directly generate speech. Instead, the circuit watches her brainwaves via an Arduino and feeds the raw data to a Raspberry Pi. A machine learning algorithm determines Alma’s brainwave state and plays prerecorded audio expressing Alma’s thoughts.

Alma’s collar duplicates — to some degree — the fictional collar from the movie Up. Of course, Dug was a bit more loquacious. It isn’t very clear from the video how many states the program classifies. A quick peek at the code reveals five audio clips but only one appears to be wired to the recognizer — the one for a treat. We think it might be a harder problem to figure out when the dog does not want a treat.

The last time we saw a talking dog collar it was phone-controlled. If you really want to probe a brain — canine or human — you could do worse than to check out OpenHardwareExG.

Oh. By the way. Good dog! Very good dog!

Automatic Volume Analyzing Smart System

The theme is to make a prototype that can analyse and identify two different shapes and display its volume. Here we choose to go with Cube and Cylinder as two different shapes. It can detect shapes, analyze and calculate volume by itself.WorkingThe system contain 2 ultrasonic sensor, one is for find...
By: vysakhachu

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Instructables 17 Mar 00:42

Making SAMD21-based Boards USB Port Into a Hardware Serial Port!

It is standard nowadays to use an Arduino (or any other compatible) board USB port as an emulated Serial port. This is very useful for debugging, sending and receiving data from our lovable boards.I was working on uChip when, going through the datasheet of its MCU (SAMD21), I noticed that the USB gp...
By: rantonio90

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Instructables 16 Mar 16:54