LED status TTL logic high low circuit


LED status TTL logic high low circuit

This is a cycle high or low status of the digital logic signal. Since the 5V power supply is ideal for TTL digital And the circuit to clearly display text. Is easy to see the value.
Operation of the circuit is in normal state or input into Low. And it IC1 to a High state to stimulate Q1 to work with the pressure to drop across R2. That the diodes D1,D2, D3, and connect the LED 7 Segment to display the letter “L” out. If the input is marked High, it makes IC1 return status is Low the Q1 does not work, but will flow from the input through R5, R6 entry. 7 Segment and through R3, R4, D4, D5 to 7 Segment as well. the 7 Segment display letters “H” up. and the cycle will have a resistor R7 is connected with to help reduce the current flow to LED 7 Segment. It prevents damage crash.


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