Archive for January, 2008

BL-Ctrl change of FETs

January 29th, 2008

A lot of people in the MikroKopter-Forum think, that it is difficult to change the FETs of the BL-Ctrl. But that isn’t so. All you need is a soldering iron with enough power. You can even use a “really brutal” 230V device without any regulation. Then you have to heat up the FET and remove it from the PCB.

To solder a new FET to the PCB, do the same in the other direction. Really simple – see my short movie:


Google - Link: Change of BL-Ctrl FETs

(Strangers…) MikroKopter in the night….

January 28th, 2008

He ho guys!

Some of you already thought, that i stopped my work with the MikroKopter. But that is not the case.
During the last weeks i build up a second (new/old) MikroKopter with my 1.0 FlightCtrl. Also the “old” handmade 1.0 BL-Ctrl got an update with the Vishay FETs (P-Channel: SUD50P04-09L and N-Channel: SUD50N06-09L). The BL-Ctrl 1.0 was updated to a BL-Ctrl 1.1 – that only needed a small hardware change (the address coding). This can be seen in detail on the following picture:

bl_10_to_11.jpg

The technical data of the “very-low-cost, very-low-weight and much fun to play with – MikroKopter”:

  • Axis centre distance: 40 cm
  • Standard Alu-Frame with Centerplates
  • FlightCtrl 1.0 (not modified to 1.1 yet – but not really necessary)
  • BL-Ctrl 1.0 PCB with modified hardware, so that hardware adressing is possible like BL-Ctrl 1.1
  • “Schwimmnudel” PE landing pads (really low cost and low weight)
  • E-Sky motors – out of the MK-Shop (they are much louder than the Roxxy, but also much cheaper and for the first (or in my case the second) MikroKopter completely ok.
  • LEDs to be able to fly in the night/evening. (got from my Company, where I’m currently working: http://www.tridonicatco.com/ LED P510/511) They can be directly driven by the LiPo (11.7 Volts)
  • Standard 3S1P Lipo
  • ACT receiver (also out of the MikroKopter Shop)

And now some additional pictures of my second “Training-Kopter” with LEDs :

lighting_mk_1.jpg lighting_mk_2.jpg lighting_mk_3.jpg lighting_mk_4.jpg lighting_mk_5.jpg

Also i received a new Video-Transmitter from Hong-Kong. But more details later…