This circuit for 3.3 V logic circuits has a 5 V input and the maximum output current is on the order of 1 A. The circuit is from a Linear Technology manual.
This circuit turns a lamp on and off with alternate touches of a switch. Modern Darlingtons can be used....
This circuit with the CK722 was found in a Raytheon publication from the 60's. The relay is of the...
This circuit was found in Radio Electronics magazine from July 1960. The components used are...