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    • Product Reviews

      Product Reviews

      Best deals on tools and gear that makers, hobbyists, DIYers, and I like. I publish deals and write unbiased reviews. Everything that you'll find here was on my hands and it was tested. I don't include external or paid reviews on my blog! You get information about performances, price-performance ratio and more. Most of the time I include the product on a DIY project.

    • M5Stack, MicroPython, Product Reviews
      1 min | 718

      M5Stamp Pico: M5Stack presents today an ESP32 miniature and powerful module

      M5Stack, MicroPython, Product Reviews | 1 min | 718

      M5Stack is a technology company based in Shenzhen China, which specializes in the design, development, and production of IoT development toolkits and solutions, and today they have just launched a new device in its core series: the M5Stamp Pico; and awesomeness comes in small packages.

      I thought the M5Stack ATOM would be the smallest core possible, but I was wrong!. The M5Stamp Pico is even smaller and still very powerful. The M5Stamp is the smal...

    • Product Reviews
      2 min | 530

      #Crowbits: Programmable Blocks for STEM Education (ESP32, Arduino and Micro:bit compatible!)

      Product Reviews | 2 min | 530

      Late last year, I posted an article about the Elecrow CrowPi2. The laptop integrates plenty of electronics modules and I will be publishing a review later this month. But, this article is about the Crowbits. The folks at Elecrow are great and they have launched the Crowbits magnetic electronic blocks for STEM education, and the devices are ESP32, Arduino, and Micro:bit compatible.

      Playing with Crowbits
      Fig. 1: Playing with Crowbits

      There are over 80 programmable electronic magnetic modules and bricks (see Fig. 2), with three different sizes ( large, middle, and small modules) and colors that indica...

    • M5Stack, Product Reviews
      2 min | 6734

      #M5Stack: Introducing the new M5Stack CORE2

      M5Stack, Product Reviews | 2 min | 6734

      M5Stack has just launched the M5Stack CORE2, an ESP32 based IoT development kit, with a capacitive touch screen that brings users a smoother human-computer interaction experience. As usual, the development kit is compatible with Arduino, MicroPython, and UIFlow.

      The M5Stack CORE2 has an ESP32 D0WDQ6-V3 with two Xtensa® 32-bit LX6 microprocessors that can be individually controlled. The clock frequency is adjustable from 80MHz to 240MHz.

      M5Stack sent me an early sample to play...

    • Product Reviews, Raspberry Pi
      3 min | 1873

      #CrowPi2: a Raspberry Pi Notebook for Extended Creativity

      Product Reviews, Raspberry Pi | 3 min | 1873

      Last year, Elecrow sent me the CrowPi and I used it in some of my projects, including this video:

      Together with the Corel USB accelerator, I programmed a YOLOv2 object detector, etc.

      The CrowPi kit is magnificent and has everything you need to start playing with the Raspberry Pi. Furthermore, you get everything in a suitcase, that you can close and clean your "mess" in seconds. :)

      Today, Elecrow is announcing a Kickstarter campaign to support the Crowpi2. This time, they integrated the Raspberry Pi in a notebook-like case (see fig. 1), and I think it i...

    • Product Reviews
      3 min | 611

      #Gearbest: I bought something there and I regret it!

      Product Reviews | 3 min | 611

      I've never used my blog to criticize a company. But this time, I need to express my complete disappointment with Gearbest. The last days, I have had the worst shipping experience, and I do have extensively worked with companies in and outside of the EU. In a nutshell, I ordered a home appliance on Feb. 21, and I'm still waiting to receive it. They've extended the shipping deadline twice (each time for one month), and now the tracking number has expired.

      2020-05-07 15:00:09
      Hungary, Customs clearance processing complete.
      2020-03-04 10:00:03
      Hungary, Parcel is in clearance.
      2020-02-28 17:00:36
    • PCB/Board designs, Product Reviews
      4 min | 1530

      #WAVE2: an Ensemble Yourself Oscilloscope (DSO)

      PCB/Board designs, Product Reviews | 4 min | 1530

      Last month, I published a review of the DSO138. This time, I put together the WAVE2 (15801K) and I review it in this article. The WAVE2 is a 2-channel portable oscilloscope design by JYETech for a hobbyist. It has a resistive touch screen display, X-T (signal-time) / X-Y (signal-signal) plotting functionalities, memory (4 blocks), measurement functionalities (V -max, min, avr, pp, rms-, frequency, duty cycle), serial interface and can be powered using an external 5V source (micro ...

    • PCB/Board designs, Product Reviews
      3 min | 921

      #DSO138: an Ensemble Yourself Oscilloscope (DSO)

      PCB/Board designs, Product Reviews | 3 min | 921

      A few months ago, I was looking for a small digital signal oscilloscope (DSO) module, and last week I got a DSO138 DIY kit from DigitSpace. The oscilloscope is originally from the company JYE Tech, but as usual, there are a lot of copies.

      The oscilloscope has a bandwidth of 200kHz, a maximum sampling rate of 1MHz and a maximum input voltage of 50Vpk that are sufficient for the applications that I am programming using ESP32 boards (more details here).

      In this article, I include a qui...

    • Product Reviews
      5 min | 8381

      #Xiaomi CMSXJ11A: an IP-Camera with built-in battery

      Product Reviews | 5 min | 8381

      This article evaluates three low budget Wi-Fi cameras that I buy from e.g. and but I will focus most of the analysis on my last acquisition the XIAOMI Mijia CMSXJ11A.

      All cameras in this review are Xiaomi (not exactly built by Xiaomi) and can be connected to the application Mi Home (apple/android). Moreover, you need to select the region to China (Mainland) in the application, otherwise you are not going to find the devices. This has a main disa...

    • Product Reviews, Single-board Computers
      6 min | 21877

      #Orange Pi Zero LTS: An 'upgraded' alternative to the old Raspberry Pis

      Product Reviews, Single-board Computers | 6 min | 21877

      The Allwinner H2+, which integrates four ARM-Cortex A7 cores that can clock up to 1.2GHz, is powering the Orange Pi Zero LTS. The tiny board, which measures just 52 x 46 mm, features 802.11 b/g/n Wi-Fi, Ethernet, up to 512 MB of RAM, USB 2.0 Type-A and a microSD card slot. There is also a 26-pin unpopulated GPIO header along with a 13-pin header for a headphone, USB 2.0, TV-out, microphone and IR signals.

      This board is the next generation of the Orange Pi Zero th...

    • Product Reviews, Single-board Computers
      6 min | 8291

      #Rock Pi S: a tinier version of the Raspberry Pi with Alexa functionalities

      Product Reviews, Single-board Computers | 6 min | 8291

      Radxy, the company behind the Rock Pi 4 is back! A couple of days ago, I've received the Rock Pi S (see Fig. 1), a miniature developer board that measures just 38 x 38 mm. The board is powered by the Rockchip RK3308 SoC, which integrates four 64-bit ARM Cortex-A35 cores (Ultra-High-Efficiency). Each of the cores reaches up to 1.3 GHz. The SoC also has a built-in voice activity detector (VAD) for use with IoT and smart voice applications.

      Despite its tiny size, the Rock Pi S in...

    • General, Product Reviews
      5 min | 4540

      #Timeular: Tracking your time using an Octahedron

      General, Product Reviews | 5 min | 4540

      First of all, this article is a product review which was/is not supported by Timeular GmbH or similar. I bought the product two weeks ago, because I wanted to test it. I missed out the Kickstarter campaign (2016) and the regular price for the octahedron was too expensive for me.

      Timeular application: Analytics Dashboard
      Fig. 1: Timeular application

      This summer, the tracker is on sale with up to 50% discount and I bought the basic plan. I got an octahedron -called tracker- which connects to the Timeular application (Mac, Win...

    • Home Automation, Product Reviews, Raspberry Pi
      2 min | 11533

      #Zigbee: Reading Xiaomi Sensors with a Raspberry Pi (no Xiaomi gateway needed!)

      Home Automation, Product Reviews, Raspberry Pi | 2 min | 11533

      I've been very busy the last weeks. I moved to a new apartment and I was living between moving boxes. Four days ago, I managed to put my desk together and now I have some time (not a lot) to write a new article.

      Last month I've received from GearBest two Aqara sensors:

      • Aqara Cube - internal motion sensors (gyro + accelerometers)
      • Aqara humidity, temperature and air pressure

      These sensors use Zigbee and I connected them to a Raspberry Pi running Raspbian OS and a dockerized version o...

    • MicroPython, Product Reviews
      5 min | 12373

      #MAiX Dock & MicroPython: Hands-On with low power AI at the edge

      MicroPython, Product Reviews | 5 min | 12373

      This week, I received from Seeed Studio a MAiX Dock to review it. The main board of the kit includes a Sipeed M1w which is a compact module like the ESP32 but based on the Kendryte K210 dual core RISC-V processor. It is designed for low power artificial intelligence workloads, such as face detection, object recognition, or audio processing. There are two type of modules: the Sipeed M1 and M1w, the last one includes WIFI connectivity.

      The main features of the MAiX Dock boards are:

      1. Display I/F – A...
    • M5Stack, MicroPython, Product Reviews
      3 min | 6546

      #Review: Meet the M5Stack FIRE

      M5Stack, MicroPython, Product Reviews | 3 min | 6546

      This month, I received the M5Stack FIRE development kit with a PLC base kit from Banggood to review (see Fig. 1). After using it, I can affirm that the M5Stack takes an alternative approach to ESP32 prototyping, because the resulting projects are almost simultaneously finished products. This is possible because the board is housed in a stylish and robust hosing with graphics display, buttons, microSD card slot, USB-C port and speakers. I tested the M5Stack FIRE development kit, and the board i...

    • Product Reviews
      1 min | 833


      Product Reviews | 1 min | 833

      Hi there! the guys at InkDrop need some stars on GitHub! Follow the project and stayed tune! What? You don't know about! Ok, no problem: Here you got a description!

      GitHubRepository: inkdrop-app


      InkDrop is an open, easy-to-use and uncensorable social network. It is an open source project and can be considered the blockchain community’s answer to the major, privacy invading platforms we depend on today.

      Today’s social networks are centrally controlled & moderated and they don’t pass back the proceeds to the creators. They rely on business models that are irreconcila...