After reading the latest hackit post, [Ben] sent in this older, but simple logic ... The circuit uses a HC245 octal bus transceiver to feed the 8 data lines on the parallel port.

Two lamps connected in series with ... same throughout a circuit and voltages add up to the supply voltage. Components that are connected on separate loops are connected in parallel.

are electronic components that can be used to regulate the voltage in circuits and to make logic gates ... Ellie and James explore series and parallel circuits. They also discuss the differences ...