Author Archive
Lunar Oasis: Space Agriculture Era Begins
By Technofreak at 16 April, 2009, 1:28 pm
WASHINGTON, although there is no oxygen in lunar atmosphere, plants can now grow there. Paragon Space Development Corp has develop a portable green house that can be used to grow plants in space. The shape of the green house look like a garden light with only 46 centimeters in height. The glass tube is fastened [...]
Read More >>Loudspeaker Fuse Placement for Audio Amplifier to Preserve A Good Bass Response
By Technofreak at 6 August, 2008, 9:51 am
To protect the loud speaker from destructive signal, the most simple way is by placing a fast blown fuse between speaker and the amplifier output. This common solution is depicted in the figure 1 (a). Figure 1. Fuse Placement to Preserve Good Bass Response The fuse in the circuit has a significant resistance to generate [...]
Read More >>Anti Burglar Alarm, A Half Lie is Much More Dangerous Than 100% Lie
By Technofreak at 5 August, 2008, 3:52 pm
The idea that a half lie is much more dangerous than 100% lie is implemented in this design. Rather than showing off that our car is 100% protected by a sophisticated alarm and protection system, this anti burglar protection circuit prefer to lie that the car is not protected by any electronic alarm or any [...]
Read More >>Avoid Access Violation Error from OpenDialog (TOpenDialog) / SaveDialog (TSaveDialog)
By Technofreak at 24 July, 2008, 10:53 am
Whe I use OpenDialog (TOpenDialog), SaveDialog (TSaveDialog), OpenPictureDialog (TOpenPictureDialog), or SavePictureDialog (TSavePictureDialog), on Delphi 7 or Turbo Delphi Explorer running on Windows Xp Sp2, I always get access violation error (run time error) after I open the dialog box for second time. At first time the application run, it’s OK to open and browse the [...]
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