• A2212 Motor and 10×4,5 Propeller on the Test Stand; Thrust, Current and Speed Measurement

    For my quadrocopter I have chosen the drive combination of A2212/13T 1000KV motors and 10×4,5 propellers. It`s time to get some data for the dimensioning. What I want to know is of course the thrust and the current at different rotational speeds. From that I can calculate how heavy the multicopter can or should be and how long I can fly with it. I screwed the motor with the propeller onto my homemade test-stand and connected it with a 3-cell Lithium Polymer battery, a 30A ESC and the Unitest 2, that I bought some years ago. Then I started with the measurement.
    link to the motors: Ebay A2212/13T 1000KV Brushless Motor
    link to the propellers: https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=48081

    Click here to download the open office calc diagram shown in the video: diagramm
    You can change the values and use it for your own measurements.

  • How to disassemble a Hydraulic Jack

    In this video I am disassembling a hydraulic car jack that I bought for 15 euro. I wanted to see how it works and in which quality the parts are. I didn`t disassemble all of the parts. The pipe in the middle, the safety valve , and the ball valves are still in place, because I have no reason to do it. Everything is visible in the photos and the function also became clear. I have plans for an alternative use of the hydraulic jack, I will post about it once I have tested it.
    link to the hydraulic jack: Brueder Mannesmann Werkzeuge M 007-T-GS2 Hydraulischer Wagenheber 2 t

    the photos:
    Continue reading  Post ID 97

  • Yihua 936 – Review of a 14 Euro Soldering Station

    It was more or less a coincidence that I saw this very cheap soldering station on Hobbyking, while looking for parts for my quadrocopter. Here is my review for it:

    The Yihua 936 soldering station is a real upgrade for my soldering tasks, compared to my old and more expensive soldering iron with wall plug and without temperature regulation.
    Continue reading  Post ID 92

  • Brushless Motor A2212/13T 1000KV review

    For my quadrocopter I needed some good and cheap motors. This A2212 1000KV brushless outrunner motors from ebay seller global.mart are very cheap and in this video you can see what I got for my money. I`m also measuring the radial runout.

    link to the motors: Ebay A2212/13T 1000KV Brushless Motor

  • Improvised opening of a screw nut on a hydraulic jack

    I wanted to make a quick video of the disassembling of a hydraulic jack, but opening the main screw nut on its top was a harder task than I thought before. After some impractical attempts and without owning an approbiate wrench I finally found an improvised method to open it. I didn`t even need a wrench, “only” two vices.

  • Arduino: How to control LEDs wireless over 433 MHz

    Here is a short video about how to control 2 LEDs with 2 buttons wireless with a cheap 433MHz module and the virtual wire library. This was a bit tricky, therefore worth making a video about it.
    You can download the sketches and breadboard pictures from below.
    get the 433 MHz module here: http://www.ebay.com/itm/370685120131

    download transmitter and receiver sketches: Continue reading  Post ID 75

  • How to multiply your Arduino UNO for less than 4 dollar

    In this video I show and explain how to easily get and use several Arduino UNO microcontrollers Atmel 328P-PU without the need to use the Arduino UNO board, except for uploading the sketch.
    It became kinda obsolete, after I found out about the even cheaper Arduino Pro Minis. But anyway, it was a nice project and gave me some more understanding of the Arduino hardware.


    pictures of the breadboard and parts: Continue reading  Post ID 73

  • Powering a Notebook from a 12V battery

    Here I show how I supply my notebook with energy from a 12V battery with a car adapter.
    (I don`t know if it is available in other countries; if not: buy a similar product)

  • Arduino: getting started with a 10 dof IMU

    In this video I`m showing how I`m getting started with a 10 degree of freedom inertial measurement unit containing an accelerometer ADXL345, a gyroscope L3G4200D, a magnetometer HMC4883 and a barometer BMP085 on an Arduino UNO.
    link to the IMU: Ebay – 10 dof IMU
    Links to the libraries used in this video: