We found this circuit in a documentation from the 70s. The original text was kept. The oscillator circuit we present is' classic. Its arrangement allows to obtain at the output a sinusoidal signal whose frequency is determined by the components C2-C3-C4 and R2-R3-R4. The signal produced with the indicated components is between 800 and 1,000 Hz. If the values are modified, the equivalence between them must be maintained, that is, R2, R3 and R4 must have the same value between them, the same happening with C2, C3 and C4.
LIST OF MATERIALS
C1 = 10,000 pF
C2 = 10,000 pF
C4 = 10,000 pF
R1 = 5,600
R2 = 680
R3 = 680
R4 = 680
R5 = 680 K
R6 = 2,200
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