Solenoid Driver W040

The document contains a schematic diagram for the W040 Solenoid Driver module by Digital Equipment Corporation, dated July 29, 1964. The circuit illustrates the use of transistors (DEC 3790 and DEC 3494) and diodes (MR 2066 and D-664) to drive solenoids, with associated resistors of 4,700 ohms and 82 ohms. It includes revision details and standard component specifications.