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Thursday, 4 September 2014

Logic Behind Connecting Current Limiting Resistors to LED Matrix (Page 2)

by realfinetime  |  in Electronics at  11:36

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Method 2:

          Before starting the second method, read the first method in previous page. Same 'H' display can be created by another method also. Observe the frames given below. When these frames are also displayed at a high speed, our eye will get an 'H' feeling.

Conclusion:

            We had already concluded that current limiting resistors should be connected to the LED matrix to protect from over current. Next is to find, the pins of  LED matrix to which current limiting resistors have to be connected.

If your display works based on method 1, current limiting resistors of 100 Ohm should be connected to the cathode pins (4, 7, 2, 8, 12, 1, 14, 9) of LED matrix if the supply voltage is 5V.

Similarly, if your display works based on method 2, current limiting resistors of 100 Ohm should be connected to the anode pins (16, 15, 11, 3, 10, 5, 6, 13) of LED matrix if the supply voltage is 5V.

Next:  Cascade Operation of Two 74595 using Arduino

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All the circuits, published in this blog is only after testing and getting proper results in my private lab. When you try these circuits, you should check the supply voltage, polarity of components, presence of childrens nearby and shorts in the circuits. This website will not be responsible for any harm happened to you or your components caused by your carelessness.

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