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Intro
#207 Why most Arduino Soil Moisture Sensors suck (incl. solution)
#286 How does Software Defined Radio (SDR) work under the Hood? SDR Tutorial
#312 Boot a Raspberry Pi4 with an SSD to make it reliable and fast
#188 Antenna Tutorial incl. cheap DIY Antenna Tester (LoRa, ESP32)
Rutgers University Confirmed: Meshtastic and LoRa are dangerous
Raspberry Pi Server based on Docker, with VPN remote access, Dropbox backup, Influx, Grafana, etc.
Boot a Raspberry Pi4 with an SSD to make it reliable and fast
#235 RFID Hacking and Cloning with Magic Cards, Proxmark3 and Arduino (T5577)
Use your PC Soundcard as an Oscilloscope, a Signal Generator, and a Spectrum Analyzer (Arta, REW)
Which Processor can kill the ESP32?
How do Transistor Testers work (and some other insights)
Programming
#288 Raspberry Pi 4 Coolers: Which one is best? (Quickie)
24GHz Radar Presence Detector that Works (LD2410)
#289 ZigBee Tutorial: Ikea Tradfri, Philips Hue, Xiaomi Mijia
Simple Trick to protect your Raspberry SD card from Crashing
I found an Excellent Raspberry Pi Replacement for Home Assistant / IOTstack (incl. Proxmox)
Cheap and simple Solar Power for our small Projects (ESP32, ESP8266, Arduino)
Why most Arduino Soil Moisture Sensors suck (incl. solution)
USB-C Tutorial for Everybody (Connector, Cable, PD, Data Transfer, Devices)
#274 Free Inline Debugging for ESP32 and Arduino Sketches
How to use Voltage Supervisors to protect ESP32, Raspberry Pi, and Batteries
#276 Power over Ethernet (PoE) Tutorial
Test of Battery operated ESP32 Boards (Olimex, TinyPICO, EzSBC, TTGO)
#381 How to work with a Real Time Operating System and is it any good? (FreeRTOS, ESP32)
Hardware
Testing
Upgrade your Raspberry Pi to a Homelab (instead of a Raspberry Pi 5)
Use the very attractive new ATTINY chips for your projects
ESP32 precision GPS receiver (incl. RTK-GPS Tutorial). How to earn money with it (DePIN)
#176 BLE Human Presence Detector using an ESP32 (Tutorial, Arduino IDE)
#246 12 Tips and Tricks for Neopixels Projects (Arduino, ESP8266/ ESP32)
#352 Raspberry Pi4 Home Automation Server (incl. Docker, OpenHAB, HASSIO, NextCloud)
#378 How to choose Radar Sensors (Tutorial). Incl. PIR and LIDAR
Modulation
#179 Was it worth waiting for Bluetooth? How Much Current Needs the ESP32 Bluetooth in BLE?
Remote Controller for Clocks (IKEA and others, DCF77, WWVB, MSF, JJY)
#227 The ugly truth about LIDARs for obstacle avoidance (RPLIDAR A1, Arduino, ESP8266)
#240 Time to Say Goodbye to Arduino and Go On to Micropython/ Adafruit Circuitpython?
How To Lose Weight with a Raspbery Pi and an ESP32
#147 Introduction into ESP32 with first tests: PWM, Servo, Web, Touch Sensors (Tutorial)
#126 Cheap MQTT Broker on Raspberry Zero W / DietPi / MQTT Message Logger SQlite / PHPliteAdmin
#200 How to Spend your Money Wisely
#295 Raspberry Pi Server based on Docker, with VPN, Dropbox backup, Influx, Grafana, etc: IOTstack
I Try to Build a Battery Charger for a Bicycle Battery
Power
Firmware
#419 ESP32 Audio Tutorial with lots of examples
#362 Wireguard and NextCloud on a Raspberry Pi = Marvelous (Docker, IOTstack)
Tune into 50,000+ live radio stations from every corner of the world on an interactive 3D globe with audio-reactive visualizations.