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DC 24V transformer to DC 12V can be used with linear buck or DC-DC buck.
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DC24V step-down to DC12V is very easy, the conversion between different DC voltages is what electronic engineers often do, the same electronic product, different devices will have different voltage requirements. Linear voltage regulator chip buck design is simple, but the conversion efficiency is low, the pressure difference is large or the current is large, the chip will heat, need to install heat sink, occupy a large space; DC To DC step-down design will be slightly more complex, but the conversion efficiency is high, the heat generation is less, and the space taken up is less.
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Linear voltage regulator chip 7812 voltage reduction scheme
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Using the 7812 linear voltage regulator chip is the simplest, input DC24 can get DC12V output, only need to place a filter capacitor in the input and output. The input 24V end can use 220u\/50V electrolytic capacitor, and the input 12V end can use 470u\/25V electrolytic capacitor.
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Because of the large pressure difference, a heat sink needs to be installed for the 7812 chip