Controlling The Light Emitting Dioda (LED) Flame With Delphi Through Parallel Port

Light Emitting Dioda (LED) is electronic component which able to change electrical energy into light energy. Basically, this component can be used as indicator that LED series is actively flowed current.

In this case, LED will have function as indicator in pin-pin LPT port which will be accessed through small port component in Delphi. If pin LPT port have logical 1 so LED will turn on, and vise versa, if the logical is 0 then LED will off, the series are as follows:

Figure. t he LED controller series through Parallel Port / LPT Port

Figure. The series of Controlling The Light Emitting Dioda through parallelport

The program which is used to control the LED is discussed in the writing entitled Accessing Parallel Port Personal Computer (LPT Port) with Borland Delphi 7.0 using Small Port component which can be accessed CLICKHERE.

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