User manual

20
Fig. 12: An NAND gate as inverter
The function of the circuit can be presented by a so-called truth table.
In the lower gate (NAND 1), the input is applied to GND (0), the output
is switched on because of this (1). In the upper gate (NAND 4), the
input is applied to Vcc (1), the output is switched off because of this (0).