Relej aktiviran tamom
Popis dijelova: Otpornici su 1/4 Watt, 5% R1, R3 = 1K5 R2 = 6K8 R4 = 3K3 Rx = 1K-10K (vidi tekst. Sam 3K3) P1 = 20K, trimer pot LDR1 = Optokopler Q1, Q2 = PN200, 2N3906, NTE159, 2N4403, itd. Q3 = 2N3053, 2N2219, 2N699,
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