User manual

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Fig. 11: Pinboard setup
The circuit uses only two of the four NAND gates (NAND 1 and NAND
4). Both inputs are connected. This turns the NAND gate into an
inverter. An input condition zero is turned to an output condition one
and vice versa. At the output, one LED each is connected with its
dropping resistor. During this experiment, the left LED is lit while the
right LED remains off.