Electronics, ESP8288 and ESP32, Arduino, CNC, Model aircraft and more

Featured articles:

A homemade CO2 meter with Wifi against the coronavirus. The CO2 Easy
CO2 Easy: Homemade CO2 Meter with WiFi

Build your own CO2 meter easily in one afternoon

CO2 Meter TFT Color Display with TTGO T-Display Sensirion SCD30 - The CO2 Gadget
CO2 Gadget

Small and discreet CO2 meter with mobile App. It measures air quality discreetly and at all times.

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About Mariete's Blog:

In this blog you will find useful and fun information about the things that I love, and that, I imagine, you too. My motto is "Not a day without cacharjar" and I try to fulfill it. Maybe not every day I start soldering an electronic project, or programming, but rare is the day that I do not look for information and I dedicate the time to learn, while I think about what can i do next.

Experiments with ESP Easy (ESP8266) and low consumption - v1.0

Do you want to reduce the consumption of your project with ESPEasy and an ESP8266 easily to be able to use it with batteries for months? Keep reading. In this series of articles, of which ...
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CO₂ and Particle Meter Analysis DM306 / WS1125

What is special about the DM306 CO₂ and particle meter, will you ask me to do an analysis of it, you will ask me? Well, it turns out that on one of my long walks ...
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Using a ModeMCU as a voltmeter

Measure volts with an ESP8266 Don't have a multimeter? No problem! Did you know that you can use your NodeMCU (or any ESP8266) as if it were a voltmeter? Sometimes a voltmeter is ...
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CO₂ meter with MQ-135 sensor (Don't miss it, it's not what it seems)

In this article I am going to tell you what you have to do to mount a CO2 meter with an MQ-135 (sic) sensor. An easy and cheap tutorial ...
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PeluCO₂: A CO₂ meter on your wrist (wearable)

Do you want to always have the level of CO₂ present in the environment within your reach? This is the perfect solution. A "full equipe" CO₂ meter (without compromise) in ...
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Battery powered CO₂ monitor (well done)

In this tutorial I am going to teach you how to add a battery to any microcontroller-based project, correctly, without danger. The uses are endless and although I will use ...
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Color touch screen for CO medidor meter Wow!

There is no question, things come in through the eyes and a color touch screen for our homemade CO2 meter takes the project to another level. Who can ...
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Are home CO₂ meters as reliable, accurate and precise as commercial ones?

This question about the reliability, precision and accuracy of homemade CO2 meters, appears repeatedly and, the truth, I felt that it was time to write a few lines to ...
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Gallery: User CO₂ Meters

There are many users, of all levels, who have built the eMariete CO2 Meter. Some have created a simple and provisional montage, on the air, without further pretense ...
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Active or passive buzzer for Arduino, ESP8266, NodeMCU, ESP32, etc

Sometimes we need our ESPEasy-based project to generate sound warnings, such as warnings, alarms, confirmation of certain actions, or other reasons. In this article we will see, step by step, how ...
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CO2 meters with Arduino, ESP8266, ESP32, etc.

CO2 measurement has become very important to me and blog users.

Here you will be able to find lots of useful information, if you want build a CO2 meter.

Comparison of CO2 sensors, sensor analysis, unboxings of commercial CO2 meters, diagrams, options and extensions, etc.

Projects with ESP8266, ESP32 and Arduino boards

From how to get started with download the Arduino IDE and its installation, going by how to program an arduino, until pinout (what is each pin or "leg" for).

You will find articles about the differences between an Arduino Uno and an Arduino Nano and when to use each board or tutorials on how to write Arduino programs, called Sketches. Of course everything in Spanish (although there is an automatic translation into English).

I write articles periodically, so it is very important that you subscribe to receive the news. Do it now, before you forget it!

RC Model Aircraft (Radio Control)

I love the radio controlled model aircraft. I've been practicing it for more years than you would think and I've flown planes, drones and helicopters, both electric and Glow or gasoline (that is, explosion engine). I love the FPV, especially if it is Long range, or Great Reach, and, above all, the gadget.

Do not stop subscribing in the form on the right, because I have material to write a lot of very interesting articles and I plan to write them little by little.

3d printers

I am a big fan of 3D printers. It seems to me an incredible technology and a transversal hobby because it helps me in the rest of my hobbies.

I started in 2014, with a PS3 Steel that I built asking for parts from half the world, I still have this printer, and for a couple of years I have a Creality CR-10S and the truth is that I am delighted with it, although I have made quite a few modifications. I have to say that for some things I still use the PS3 Steel because I have it "very fine" and it gives me better quality (depending on what things, as I say).

The first thing I did was install a 750 watt silicone heated bed at 220V, the following add auto leveling of the heated bed with BL Touch, then replace the controller with one of 32 bit. I will be writing articles about these things because I took photos of many of them and even recorded a video.

Homemade CNC Machine (Numerical Control Milling Machine)

3D printers gave me a lot of satisfaction and whetted my appetite to build more things, and it was inevitable ... the following was build a homemade CNC milling machine with Arduino (also called control milling machine numeric). Don't miss the articles I have written about it (and continue to write) because it is an incredible machine for working with wood, aluminum, plastics, making printed circuit boards and much more.

Laser engraving machines

And, yes, once again one thing led to another. I started by add a diode laser to the CNC milling machine but right away I built one CNC Laser dedicated with aluminum profiles and shortly after I bought a laser engraver CO2 really, it has allowed me to do a lot of things. Of course I have done so many modifications to the CO2 laser engraver it already looks little like the one I bought.


There are many other things in the world of electronics that I do, from designs, modifications, repairs, radio frequency, etc.. I'll be writing about it.

Where do I begin?

As you see i have many pending things to write about and I have to prioritize. I need help deciding what to write first. Share my Facebook page by clicking on the icon below and then tell me on my facebook page What do you want me to write. 

Above all, do not forget to subscribe, just below, so you do not miss anything.Do it now, do not forget!