NOR gate with the 7400 (CB22406E)

The configuration below shows how to use the 7400 as a NOR function. The circuit is TTL and must be powered with 5V.

555 debounced switch (CB9229E)
We found this circuit without bounce in an Elektor from the 90s. The circuit can be used as a...
200 mA LDO - Ultra Low Noise (CB15565E)
The circuit shown in the figure consists of a 200mA low voltage drop (LDO) regulator using the...
5 W Amplifier (CB6167E)
Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be...