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STM32 OLED – Oscilloscope music

Today I’m writing about a small project I made to test some peripherals of the STM32 microcontroller.In this case, I’m using an I2C OLED display and two of the board’s ADCs. The goal is to display the input signals on Read more…

By cascajolabs.es, 2 months12 de August de 2025 ago
Blog

ESP32 USB HOST – MIDI (quickest/simplest version)

Some time ago, I made a quick little project to connect my AKAI MPK Mini MIDI keyboard to an ESP32-S3.Here’s a short demo video: This post is about this very first, simple version. The first step, if you have the Read more…

By cascajolabs.es, 2 months11 de August de 2025 ago
Blog

PCB: Audio amplifier + VU meter

I’ve been working on a project that needed an audio amp, so I went with the LTK8002D. Along the way, I ended up designing a quick test PCB to try things out before moving on to the final version. Since Read more…

By cascajolabs.es, 4 months29 de June de 2025 ago
Blog

LCD 7 segments 3 digits with an ESP32

I recently got some tiny LCD screens that have 3 digits with 7 segments, and I’ve been playing around with them to understand how they work better. The first thing I noticed compared to 7-segment LED displays is that to Read more…

By cascajolabs.es, 12 months20 de October de 2024 ago
Blog

ESPNOW and RSSI as a measure of distance

In this project, I used the RSSI value (Received Signal Strength Indicator) as a measure of distance between the transmitter and the receiver, using the ESPNOW wireless protocol. The transmitter is an ESP8266 with the following code: It sends a Read more…

By cascajolabs.es, 1 year ago
Blog

Grafana Dashboard, Influxdb, SNMP and ESP8266

In this project, I developed a simulated parking monitoring system using two ESP8266 as the hosts devices. The ESP8266 is responsible for counting the number of cars in a parking lot and transmitting this information to an InfluxDB database and Read more…

By cascajolabs.es, 2 years24 de January de 2024 ago
Blog

S.A.V.I.O.R robot project #1

This project is about trying to make a robot that looks like a character from a video game called World of Warcraft. This robot is obtainable in the game through the engineering profession. Since I liked the aesthetics, I think Read more…

By cascajolabs.es, 2 years17 de September de 2023 ago
Blog

Gilfoyle’s Bitcoin warning

In this project, my goal was to create an alarm similar to the one used by one of the main characters in the series Silicon Valley, known as Gilfoyle. He used an alarm that incorporates the song ‘you suffer’ by Read more…

By cascajolabs.es, 2 years5 de August de 2023 ago
Blog

Retro Pie Console

In this project, the following components have been used: Beforehand, RetroPie has been installed on the Raspberry Pi, providing a collection of emulators for a wide range of gaming consoles. Next comes the more tedious task: soldering all the wires. Read more…

By cascajolabs.es, 2 years20 de July de 2023 ago
Blog

DIY Morse key + decoder

For the project, we will need: The idea is to attach the joystick lever to the clip or any other suitable item. The most important part of the connection is to use the correct pin of the NodeMCU, which is Read more…

By cascajolabs.es, 2 years16 de July de 2023 ago

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Recent Posts

  • STM32 OLED – Oscilloscope music
  • ESP32 USB HOST – MIDI (quickest/simplest version)
  • PCB: Audio amplifier + VU meter
  • LCD 7 segments 3 digits with an ESP32
  • ESPNOW and RSSI as a measure of distance

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