This circuit from Motorola is from 1968, appearing elsewhere on this site. The transistors admit equivalent and the relay is of the sensitive type for low voltage, according to the power supply.
This interesting comparator circuit was found in an old Motorola documentation. The integrated circuit...
This two-transistor constant current source is from a 1968 documentation. Modern equivalent...
An interesting application that finds applications in industry, especially when fluctuations in...