| Reliably detecting human presence is not easy. The HLK-LD2410 sensor uses 24 GHz frequency-modulated continuous wave (FMCW) radar technology...
More about Elektor Labs (838)
| Camera lights with adjustable color for smartphones can be expensive, so building your own is worth the trouble. Also, by making one yoursel...
| The amplifier proposed here is a bit special as the output signal is not a voltage but a current. Therefore, the frequency dependence of the...
| After building several Internet radios, it was found that the ESP32 was the perfect processor for such an application. This radio features a...
| Li-Ion battery chargers are available online at very low prices, so why would you want to build your own? Because it is a practical, reusabl...
| This project combines a handful of readily available modules with Arduino software to create an Internet radio that also serves as an alarm...
| This unusual circuit detects if the temperature of an object has passed a certain limit. A thyristor mounted on the object monitors the temp...
| We all know this. You walk past an automatic door of a shop, and it opens, even if you didn’t have the intention to enter at all. A waste of...
| A car drives up to the closed gate, where a high-resolution camera reads its license plate. If it exists in the gatekeeper’s database, the g...
| When our aged Radio Shack remote temperature and humidity station finally failed, I decided to replace it with a system of my own design. Th...