What does the indicator light on the broadband cat represent? How bright is the normal?
When the Y0 is connected to the LED light, it can be interpreted as that all three devices are functioning properly
After the connection is completed, power on. With three switches, you can see 8 LED, each emitting its own light.
its 3 input terminals are respectively connected with a switch to input 0, 1 level; the 3 enable end are respectively connected to the 1, 0 and 0 level.
The core is a 74LS138: the 8 output ends are respectively connected with a resistor in series with LED, 1K, connected to the +5V
