MIDI Drum Controller “Atomic”

Hi! This is ATOMIC, a 6-pad MIDI drum controller made with Arduino made for music production and fun!

The button allows you to change the notes of the pads which is defined in the codes as modes A (Pattern) and B (Fill mode). The idea behind this is that you first record the basic pattern in you DAW and then you add extra sounds like toms or plates. Two LEDs indicates which mode are you using, and there´s a connection for a hi-hat pedal.

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Arduino Sinewave Generator

A signal generator usually has various signals that is can generate, such as Sine, Square and triangle. Others have a sweep function and an arbitrary waveform. These are useful tools in the workshop. They can be used to test out audio circuits, op amp circuits and testing circuit response. Most modern function generators can easily put out frequencies up to 1 Mhz.

So, while I did not expect an Arduino based sine wave generator to replace my desktop function generator, I thought it would be interesting to see how to go about designing one and how it would perform.

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Sensitive Arduino Lightning Detector with Homemade Sensor

How to make a sensitive homemade lightning detector based on cheap AM receiver IC TA7642 and Arduino Nano.

A lightning detector is a device that detects lightning produced by thunderstorms.
In one of my previous videos, I showed you how to make such a detector with the help of the AS3935 sensor board which is specially designed for this purpose. This time I will show you how to make same such device, but now with a homemade detector circuit based on cheap AM Receiver IC TA7642.

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DIY Reflow Plate

I’m preparing a video where I show you how to make the PCB design and order the panel version for your board and then solder all components at once. In that way you can save time and finish your product faster so they will be ready for sale. To do that I need a reflow hot plate and that’s what we will build today using a second-hand clothes iron. We need to measure the temperature, show the power and that temperature on a screen so the user could see the values, we need to control power and in this case a lot of power because my iron is of 3000W, and then we need to have some sort of menu or control in order to select the settings. Let me show you what parts we need, the connections I will do, how to measure and control the temperature at high power and also show you the code. Finally, let’s see if this homemade reflow hot plate will work and if I can reach the desired temperature curve, so what do you think, will it work? So, guys, let’s get started.

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RGB LED Etch-A-Sketch

A modern take on an old classic — create colour pixel art by turning two rotary encoders to control the horizontal and vertical position of the cursor, click to change colour. All controlled by an Arduino Nano.

How it works

  • Turning the left encoder moves the cursor left and right. Pressing it cycles forward through an array of eight colours
  • Turning the right encoder moves the cursor up and down. Pressing it cycles backwards through the array of colours
  • When you move the cursor, the selected colour remains in the previous ‘pixel’
  • The cursor is shown brighter than the other pixels so users can see where it is.

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A Cheap Dipole Antenna From an Extension Cord

Dipoles are a classic builder’s antenna, after all they are usually little more than two pieces of wire and a feedline. But as [Rob] shows us in the video below, there are a few things to consider.

The first thing is where to get the wire. A damaged extension cord donated the wire. That’s actually an interesting idea because you get multiple wires the same length inside the extension cord. Of course, it is easy to just pull the conductors out of the extension cord, but how do you feed it? A small balun converts the unbalanced feed line into a balanced connection for the antenna. Although the title says “free dipole” this balun is commercial and probably cost something unless you happen to already have one. However, building a balun isn’t all that tricky, either if you happen to have a ferrite toroid.

DIY Si47xx All Band DSP Radio with 2.8 Inch Touch Display

This time I will show you how to make a relatively simple All band Radio Receiver which is based on the Si47xx series chip of Silicon Labs. This wonderful radio is is primarily a result of the hard work of Ricardo Caratti who creates the detailed library for the Si47xx chip, Gert Baak for the initial TFT code, and Thiago Lima which creates the Kit with a TFT touch display.

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DIY Fume Extractor Clears the Air as You Solder

Open Green Energy’s device consists of a 120mm PC cooling fan and a 3D-printed enclosure.

If you’ve done any amount of soldering, you’ve likely been annoyed by fumes from solder and flux that seem to be automatically attracted to your face. Smelly and potentially toxic, it’s best to route these fumes elsewhere, preferably through a filter of some sort to keep them from simply annoying someone else.

You can, of course, purchase a fume extractor; however, good units can cost upwards of $70, so why not build one yourself? In the video below, Open Green Energy demonstrates how to do just that, using 3D-printed components made with blue and yellow filament to match up with his Hakko soldering station.

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