Power supply for arduino 78xx

Using Arduino General Electronics
10

For example:
Note:

  1. use ie. 5W zener - it has to absorb large peaks, if any
  2. the 100uF cap could be bigger - ie 470uF..1000uF
  3. the power dissipated at the 7808 regulator is P=(14V-8V) * I, for example with 100mA it is 0.6Watt - so you need a cooler, or you may use a dc-dc converter to keep the stuff cool..

No warranties of any kind :slight_smile:

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