
Review of the FNIRSI HS-02A Soldering Iron
I got my hands on a soldering pen from the brand FNIRSI, model HS-02A. After a few hours of soldering with it, I can share my impressions. The soldering pen is stored in a very elegant box that contains everything you need for the soldering process.
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Same old song. Lolin designed a great board as intended for battery power and killed the whole design with one component
You will design a miniature board with a Wemos D1 compatible pinout, USB charging and programming, and a battery charging circuit. Well that looks like a great board! Small, powerful…

Odroid H3+. 64-bit x86 Intel Jasper Lake. Incredibly powerful single board computer.
Tomáš Bajer drew my attention to a new product from Hardkernel – Odroid H3+. Single board computer with Intel Celeron N6005 Processor (10nm, Quad-Core, TDP 10W). And what can you…

TMEP.eu – a user-friendly online service for storing and visualizing data not only from weather stations. And it can do much more.
I have been using TMEP.eu, an online service for storing and visualizing long-term statistics from my weather stations, for many years. Over the last six months, however, the service has…

10 blinking kits for you and your children which you can solder during christmas days
Christmas days are quickly comming but no stress – I prepared 10 building kits which you can solder or your children during these days. In this article, you can find…

Augmented Reality for makers, Application Engineers and also PCB designers
The Augmented Reality (AR) is modern technology which can penetrate a lot of fields of common life but it has not happened yet. InspectAR is coming with this technology for…

Measure the CO2 with CozIR-LP sensor and ESP32
Nowadays we can develop a device which will measure all parameters of air – temperature, humidity and also we can buy CO2 sensor and measure the quality of air. The…

Soldering pen for Weller tips – tindie
You can buy a lot of kind of soldering pens or soldering stations, if you prefer soldering pens, check this news. Ebay and aliexpress offers a few soldering pens, for…

How to decrease the deep-sleep current of ESP32-CAM
ESP32-CAM is very popular development board which contains Wi-Fi and Bluetooth connectivity with ESP32 module, OV2640 camera, slot for microSD card and programmer – USB-UART convertor. These parts are designed…

5 pcs of PCB with 100×100 for 0 USD
NextPCB offers 5 pcs with dimension 100×100 mm, only green soldermask for 0 USD. The shipping in my case is 8.80 USD (China Post Airmail), 24.60 USD for DHL. https://www.nextpcb.com/

Update: Rock Pi S – single-board computer with RK3308 for 9.99 USD – 256/512MB RAM, 1GB NAND FLASH, PoE
Update 2: Official release of Rock Pi S (v1.2) on official store of Rock Pi. Rock Pi store offers a few types which combine amount of RAM (256/512), optional 1GB…