This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This biestable touch circuit with the 4093 was found in a Popular Electronics from the 90s. The...
Found in documentation from the 1990s, this circuit supports equivalent transistors. The range is on...
This motor control with SCRs is from Motorola documentation from 1976. SCRs must have currents...