This circuit converts a positive voltage to negative, with maximum output current of the order of 40 mA. Q3 may be a BD136, Q1 a BC548 and the unijunction transistor may be a 2N2646. The circuit is from a 1971 documentation.
This circuit converts a positive voltage to negative, with maximum output current of the order of 40 mA. Q3 may be a BD136, Q1 a BC548 and the unijunction transistor may be a 2N2646. The circuit is from a 1971 documentation.