We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
The Texas Instruments TPA3100D2 integrated circuit (www.ti.com) consists of an efficient class D...
This inverter circuit for a capacitive discharge ignition system was found in a Radio Electronics...
An interesting circuit suggested to indicate when a device is turned off. In the figure we have...