9 V x 200 mA power supply (CB1159E)

   The different aspect of this source is the use of a 12 V lamp as a current regulator together with a 1 W zener diode as voltage regulator. The transformer must have a secondary rated to12 V to 300 mA. The circuit is from a Spanish publication of 1966. The diodes can be the 1N4002 and the zener diode is 9V1 or 9V2.





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