24GHz Radar Presence Detector that Works (LD2410)
Detecting humans is one of the biggest challenges in Home Automation. Most of us use PIR sensors for that purpose.
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Author: Andreas Spiess
DIY Photo Voltaic (PV): The setup and some unexpected things
How can we protect our wallets against rising energy prices and our homes against power outages? In this video, I
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How to Use a Vector Network Analyzer (VNA) to Test Antennas
Is this antenna good or bad, and for which frequency is it useful? A question I am often asked. Because
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How to use Voltage Supervisors to protect ESP32, Raspberry Pi, and Batteries
Computers crash if they do not have enough voltage. Li-Ion batteries could explode during charging if they were deeply discharged.
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Safely Monitor and Alarm with Supervisord and Telegram
Raspberry Pis are very good for monitoring all sorts of things. Today we will use InfluxDB and Grafana for monitoring
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Transistors "Survival Kit" and Tutorial for Makers
“Which transistor will work with my project?” Mouser alone lists different 37000 types. We will reduce this number to a
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How Transistor Testers Work and How to Use them?
If you ask me which instruments I regularly use in the lab, you will hear Multimeter, Oscilloscope, Transistor, or Component
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Tips and Tricks for Neopixels Projects (Arduino, ESP8266/ ESP32)
I love Neopixels, and I think they are a real invention. And they are dirt cheap. But you have to
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Summer Break Announcements and Plans
I give an update and share some of my plans for this summer source
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No Infrastructure Network with ESPnow and LoRa (incl. Repeaters and Gateways). A TTN replacement?
Today, I can present you a diamond: The Farm Data Relay System. A network using LoRa and ESPnow that does
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