Chasing Illuminated Staircase: Difference between revisions
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==Construction== | ==Construction== | ||
The staircase had 15 steps, so the circuit above was replicated to include 15 resistor/transistor/relay sets. As each 4011 chip contains 4 logic gates, only 4 chips were needed. | The staircase had 15 steps, so the circuit above was replicated to include 15 resistor/transistor/relay sets. As each 4011 chip contains 4 logic gates, only 4 chips were needed. The circuit was soldered together on strip board. Individual wires were soldered to the board for each of the 15 inputs. These were group into two groups of 6 and one group of 3. Each group was soldered to an 8pin din connector to connect to the demultiplexer. The 0v lines from the demultiplexer were also wired into the din and connected to the common 0v on the board. | ||
Ring connectors were used to connected each of the relay switches to the 12 supply (the jumpstarter). The other side of the switchs had short wires attached that connected to pieces of terminal strip. This allowed the control circuit to be easily disconnected from the lamps. 2 12v lamps were mounted behind each perspex panel on the staircase. Each pair was wired in parallel. The wires for each pair of lights connected to the terminal strip on the circuit and via ring connectors to the -ve terminal of the 12v supply. | |||
