Wednesday, December 13, 2017

Thursday, November 30, 2017

LAB power supply with current control (Tip for 10 )

LAB power supply with current control from 0 to 1.5 Ampere (Tip for 10 )



This is simpler version of variable power supply shown in this post.

Voltage is variable from 0 to 30 Volts and current from 0 to 1.5 Ampere.

LM317T is mostly in standard setup.

Potentiometer for voltage control is connected to ADJ pin of LM317T and negative voltage via trim pot, with which you can adjust minimum voltage.

Current control is done using  LM393 comparator and shunt resistror.

Output of LM393 is connected to ADJ pin of LM317T and regulates amperage, sensed over shunt resistor.





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Wednesday, November 29, 2017

Get Base File Info (Tip for 10 )


Here you can see example of getting basic file information.

Complete procedure of making this example program can be seen in the following video.



And following is full source code that you can use to test this example by yourself.


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LM317 Variable power supply with current control (Tip for 10 )





In this post I will show you easy to construct variable power supply using LM317 with some other components.

Final result is usable variable lab power supply with current control.

Current control is done using  LM393 comparator and shunt resistror.

Since I used one panel meter for voltage and current reading , I added LM358 OP amp to read current used by attached loads.

LM358 amplifies voltage detected on shunt resistor and amplify it to appropriate value which is set by variable trim pot.


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Monday, October 30, 2017

Get Computer Drives - Delphi Tutorial (Tip for 10 )


In this example you can see how we can get list of Computer Drives with icons and labels.

 First, check this video with details for this example .




 And of course following is the source code of this example :

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Friday, October 13, 2017

Web browser Delphi Example (Tip for 10 )


As you will see, it is possible to create simple Web browser very quickly using Delphi and component TWebBrowser , which encapsulates Internet Explorer ActiveX component.

In this video you can see all the details of creating such web browser :

And of course following is the source code for this example :

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Tuesday, October 3, 2017

Media Player with VLC ActiveX Type library Delphi tutorial (Tip for 10 )


This is an example of media player created in Delphi using VLC multimedia player ActiveX library.

For this to work VLC player and its ActiveX library must be installed.
https://www.videolan.org/vlc/

Then it is necessary to import ActiveX component in Delphi.

Detailed instruction can be seen in this video :



Fallowing is source code for this example :


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Monday, September 25, 2017

Music Player using BASS library Delphi tutorial (Tip for 10 )


Delphi mp3 music player

Example how to create mp3 player with Delphi and BASS library.

BASS library can be downloaded from :
http://www.un4seen.com/

In this video you can see in detail how to create such mp3 player.


 
And following is source code of this example.

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Tuesday, August 15, 2017

Export sql database to Excel Delphi tutorial (Tip for 10 )





An example of exporting sql database table ( in this case sqlite table ) to MS Excel.

Link to full source : Source code

Here we use previous example which we upgrade with new function used for exporting data.

 As always , here is video tutorial to watch, following with full source of this example.

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Tuesday, May 9, 2017

Video Player using Direct Show DSPack component for Delphi (Tip for 10 )





- Example of media player created with Delphi and DSPack components.

- You can download component from: https://github.com/ms301/dspack

- You should also download ffdshow from the following location :
https://sourceforge.net/projects/ffdshow-tryout/?source=directory

- Detailed procedure of video player creation is shown in the following video :

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Sunday, May 7, 2017

Monday, April 17, 2017

VirtualStringTree as Grid - Delphi tutorial (Tip for 10 )


In this example you can learn how to use Virtualstringtree from GemSoft as a Grid.


This component can be used as a regular tree view but also as string grid,so it can replace regular stringgrid and dbgrid, but with much higher speed.
Not to mention customization.

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Thursday, February 2, 2017

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