This dividing circuit can be implemented with either TTL or CMOS logic, using the appropriate logic functions. Power depends on the application.
In this phase shift circuit, the transistor can be any general-purpose transistor. The circuit is from...
This circuit is from an old Mullard (Philips) manual with applications using the 555. Choosing...
This simple TTL digital amplifier uses NAND gates and a high impedance speaker. ...