This power step for relay activation was found in the 1964 RCA transistors manual. The circuit is of the NF type and the transistors admit equivalents. R4 depends on the drive voltage.
This circuit was found in Motorola's 1967 documentation. The circuit makes use of power...
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...
This circuit has a 2 V full scale using a 4-and-a-half-digit A / D converter. The circuit is...