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

Posted on September 2, 2014 05:52 by Experimentaltechnik 1 Comment

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.

This entry was posted in Quadcopter and tagged A2212 brushless motor current propeller speed test stand thrust Format Video
How to disassemble a Hydraulic Jack

Posted on September 2, 2014 04:14 by Experimentaltechnik Comment

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

This entry was posted in Uncategorized and tagged disassmbling hydraulic jack Format Video
Yihua 936 – Review of a 14 Euro Soldering Station

Posted on September 2, 2014 03:04 by Experimentaltechnik Comment

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

This entry was posted in Reviews and tagged review soldering station yihua 936 Format Video
Brushless Motor A2212/13T 1000KV review

Posted on September 2, 2014 02:31 by Experimentaltechnik Comment

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

This entry was posted in Quadcopter Reviews and tagged A2212 brushless motor review Format Video
Arduino: How to control a DC motor (Lego Technic) with a mosfet

Posted on September 2, 2014 02:20 by Experimentaltechnik Comment

In this video I demonstrate an easy way to control a DC motor with an Arduino and a mosfet.
The sketch used in this video can, as always, be copied from here under the video.

sketch:
Continue reading → Post ID 84

This entry was posted in Arduino and tagged Arduino DC motor mosfet Format Video
Improvised opening of a screw nut on a hydraulic jack

Posted on September 2, 2014 02:04 by Experimentaltechnik Comment

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.

This entry was posted in Uncategorized and tagged hydraulic jack improvisation screw nut Format Video
Arduino: How to control LEDs wireless over 433 MHz

Posted on September 1, 2014 08:53 by Experimentaltechnik Comment

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

This entry was posted in Arduino and tagged 433MHz Arduino Led virtual wire Format Video
How to multiply your Arduino UNO for less than 4 dollar

Posted on September 1, 2014 08:24 by Experimentaltechnik Comment

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

This entry was posted in Arduino and tagged Arduino Format Video
Powering a Notebook from a 12V battery

Posted on September 1, 2014 08:11 by Experimentaltechnik Comment

Here I show how I supply my notebook with energy from a 12V battery with a car adapter.
http://www.amazon.de/Trust-Netzteil-Adapter-120W-Auto/dp/B001D3124G/
(I don`t know if it is available in other countries; if not: buy a similar product)

This entry was posted in Uncategorized and tagged 12v battery car adapter notebool Format Video
Arduino: getting started with a 10 dof IMU

Posted on September 1, 2014 06:01 by Experimentaltechnik Comment

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:
https://github.com/adafruit/Adafruit_ADXL345
https://github.com/pololu/l3g4200d-arduino
https://github.com/adafruit/Adafruit_HMC5883_Unified
https://github.com/adafruit/Adafruit_BMP085_Unified
https://github.com/adafruit/Adafruit_Sensor

This entry was posted in Arduino and tagged 10 dof Arduino imu Format Video

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