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MQTT protocol with ESP32 and Adafruit.io
Today I am implementing and testing the MQTT protocol with ESP32 and Adafruit.io, an effective way of sending data to the internet
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Blinking an LED with PIC12F675 and MPLAB X
Let’s get blinking an LED with PIC12F675 and MPLAB X, using the PICkit3 programmer and without delay() function (using interrupts)
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Using two LEDs as Human-machine interface
Today I will show you something very uncommon, using two LEDs as Human-machine interface. We will show an integer blinking LEDs
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Hilink ultrasonic presence sensor
Let’s dive in and figure out how to use a Hilink ultrasonic presence sensor, all you need is an LED and a resistor
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Tiny 0.49″ OLED display
Today we will learn how to control and use the Tiny 0.49″ OLED display from Aliexpress, a real tiny interface device
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2024 FritzenLab blog’s year in review
Today I bring you the FritzenLab blog’s year in review, a compilation of numbers from my various social networks
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Making sounds with LDR and buzzer
Have you thought of making sounds with LDR and buzzer? this is exactly what we are doing in this post, so get ready to rock!
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HDC1080 temperature and humidity sensor
Let’s get to know the HDC1080 temperature and humidity sensor, an integrated sensor made by Texas Instruments, communicates via i2c
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Power Arduino and ESP32 from batteries
Let’s dive in and learn how to power Arduino and ESP32 with batteries, using a few Aliexpress modules on the way. All safe and sound.
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16×2 LCD display with ESP32
Let’s get controlling a 16×2 LCD display with ESP32, using the Arduino IDE and a simple library. It can control various sizes of displays.
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SGP40 air quality sensor with ESP32
Today I will show you how to write code and test the SGP40 air quality sensor with ESP32 and Arduino code. It needs a companion SHT21
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Human eye light level sensor BH1750
Let’s study the human eye light level sensor BH1750, a sensor capable of sensing between 1 and 65535 Lux via i2c
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Binary clock with ESP32 and API
I am showing you how to implement a binary clock with ESP32 and API, getting hour and minute from the internet and showing in LEDs
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Capacitive touch and debounce with Renesas RA4M1
I am showing you how to implement a capacitive touch and debounce with Renesas RA4M1 and TTP223b touch controller, using Arduino code
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DIY RGB light box with Arduino
Let’s get to making a RGB light box with Arduino, using WS2812b neopixels and Arduino Pro mini, battery powered
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Blinking commemorative keychain
Let me show you how I made a blinking commemorative keychain, made of PCB and a simple oscillator circuit (3 components)
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Currency converter display with ESP32
The idea is to create a currency converter display with ESP32, showing live conversion data in a OLED display with ESP32 and Arduino code
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APDS9900 cellphone presence sensor
Let’s learn how to use the APDS9900 cellphone presence sensor, a light and presence sensor by Broadcom for cellphones
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Electronic dice with Raspberry Pi Pico 2
I’m implementing a full electronic dice with Raspberry Pi Pico 2, using the random() function of the Arduino IDE and LEDs
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Using a LDR light level sensor
Let’s get using a LDR light level sensor to sense the amount of light in the environment around. I am using a Raspberry Pi Pico 2