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I am using LM7805 for GLCD it heats up too up within 5 seconds. I could not allow it for one minute, what could I do as input voltage is 18V Dc. I have to drive GLCD plz help?
You may use heat sink and / or cooling fan.. but the best solution is to reduce input voltage.
If you can’t reduce the input voltage, you can use switched mode buck converters. Following link may help you.
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