In the rectifier diodes can be used D226 or D7 with any letter index. Variable resistor R2 – with a power switch, it is desirable to group A, to its scale, on which set the output voltage of the power supply was equal numbered. In the stabilizer instead of transistor MP39 MP40 transistors can be used … MP42, and instead of P213 – P214 … P217 transistors, P201, P4 with any letter indices. The gain of transistors must be at least 15. Zener diode D813 can be replaced by zener diodes D811, D814D D814G or. The maximum stress on the power supply output voltage will correspond to the stabilization is used to block the zener. Scale of the resistor R2 should calibrate for exemplary voltmeter connected to the output terminals of the block.
Parts list : R1,R2,R3 : 1K C1,C2 : 500uF/25V D1 : D813 Q1 : MP39 Q2 : P213 VR1 : 10K
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