Category: Electronics
-
Do It Yourself liquid soldering flux
Do you know you can make your own liquid soldering flux? And possibly flux pen refill for cheap? All you need is some solid soldering rosin and 95% ethanol alcohol. Cheap, kind of dirty, but works…
-
ESP32 and GPS with a help of TinyGPS++ library
One of the first projects I did with ESP32 development boards is a simple GPS tracker. OK, it's not really a tracker since it does not store the position anywhere, more like distance meter with a UBLOX Neo-8M Beitian BN-880 GPS unit and small SSD1306 OLED display. This ESP32 GPS Thingy as I call it…
-
Getting started with ESP32 development boards and Arduino
However fond of good old Arduinos based on ATmega328 and ATmega32u4 we might be, no one can now say they are state of the art. Sure, they might be the first choice to do something cheap and simple, but compared to most more modern designs, they are just too old and too weak. Slow, little…
-
Soldering, rosin, flux and a Stannol x32-10i flux pen
If you really really want, you can solder without flux. But it is a painful experience. Almost all modern solders have flux integrated into its core. And as long as you do not try to solder anything big, it’s enough. Of course, sometimes it is not enough and you have to help yourself with additional…
-
LoRa versus FSK modulation signal spectrum
LoRa modulation is a wireless communication technique designed for long-range, low-power data transmission. It is based on Chirp Spread Spectrum (CSS) modulation, which spreads the signal over a wide frequency range, making it robust against interference and noise. This technology is particularly useful for Internet of Things (IoT) applications, where devices need to communicate over…
-
CC1101 868MHz Wireless Transciever Pinout
CC1101 is another example of modern radio modules. I might not have the receiver sensitivity or LoRa SX1276, but with proper antennas should give more than 1 km of radio transmission. Recently I got a couple of them, so expect some new projects with CC1101 and Arduino. Now, something that took me some time to…
-
Arduino hygrometer with DHT11 and SSD1306 OLED display
One of the things I like about Arduino ecosystem is that you can prototype pretty decent device in very short time. It might not be pretty, but will work. Just like my DIY hygrometer built with DHT11 and SS1306 OLED display I’ve built few weeks ago: Simple, efficient and runs on 4 AA batteries. The…
-
Crossbow LRS, hardware
Weather outside is bitchy. Period. It rains, then it's windy and then maybe there is some direct sunlight for 15 minutes. No way to fly or test my DIY RC radio link. But, there is some progress after all. My latest changes seems to be working just fine. On a bench link was stable for…
-
Hands on: LoRa32u4 II 868MHz LoRa development board
Idea for Crossbow, DIY LRS system did not appearned in my mind out of nowhere. All my previous LoRa attempts were aimed at telemetry purposes only. E45-TTL-100 are cool, but bulky. If I would want to use them, I would either have to attach Arduino to it or hack it open and reprogram onboard CPU…