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.

Connect a BME280 sensor to ESP Easy

In this tutorial we are going to see, step by step, how we can add a temperature, humidity and atmospheric pressure sensor, BME280, to our ESP8266 project with NodeMCU or Wemos D1 ...
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CO2 on a giant screen for bars, restaurants, classrooms and the like

Many people are looking for a CO2 meter with a large screen that can be seen from a distance for installation in hotels, schools, gyms and ...
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CO2 monitor with ESP8266 (NodeMCU) and Senseair S8 sensor

Let's see how to mount the CO2 meter with a sensor. This is going to be a very short article, only with the important differences regarding the assembly ...
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Power from NodeMCU, Wemos Mini D1 and Arduino

On many occasions, in our projects, we power our microcontroller through a USB cable connected to a mobile or computer charger and we need to power peripherals (sensors, screens, LEDs, etc.) that ...
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MH-Z19B FALSE CO2 Sensors

We are seeing, in recent times, an increasing number of MH-Z19B sensors more fake than a 3 euro coin. These are low-quality imitations, ...
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3D printed box for CO2 meter

Many blog readers have asked for a 3D printed box for the CO2 meter. Ok, challenge accepted! I have designed a custom box to ...
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Connect and control WS2812B LEDs to ESP8266 with ESP Easy

Do you want to connect WS2812 LEDs to an ESP8266 with ESP Easy? In this tutorial I am going to teach you how to do it easily. WS2812 LEDs (also called NeoPixels) are fantastic and we ...
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Using a buzzer with ESP Easy

Sometimes we need our ESPEasy-based project to generate sound warnings, for warnings, alarms, confirmation of certain actions, or other reasons. In this article we will see, step by step, how ...
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The MH-Z19B CO2 Sensor Bible

The MH-Z19B CO2 sensor is fantastic. A cheap CO2 sensor, accurate (for the price it has) and very easy to use. Without a doubt, one of the most ...
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Connect an SSD1306 OLED display (or two) to ESP Easy easily

We are going to see, step by step, how to add a screen to your project with NodeMCU or Wemos D1 Mini and ESP Easy. In this case, I will take as an example ...
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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!