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.

Mini Logic probe with transistor circuit
This is a Logic probe circuit is one,That is suitable for checking the voltage levels in the TTL circuit. It receives from the circuit being tested.Shows how high or low logic level one. The circuit when the input voltage to the probe Tip is higher than 2.1 volts (state logic "high").Transi ...
Logic Probe by 74LS47
This circuit is a Logic Probe. It indicates the logic state of the node of any TTL logic circuit. To do that, we have to supply the probe with the same power of the circuit that we want to analyse: same Vcc and same GND. To check the logic level, we must connect the "Test" wire of the probe ...
Logic probe by IC 4050
When you learn digital circuit necessary tool for check logic of the digital. May flee don't pass Logic probe for extremely amateur type our electronics emphasize economize keep before. I has interesting circuit comes to present be Logic probe by IC 4050 by pillar equipment be IC ...
Logic Digital Tester by LM324
This is Logic Digital Tester Circuit. It uses the level input about 5V and use the integrated circuit LM324. Be Main Part electronics perform Drive All LED. Then use Current very low about 10mA by have potentiometer be formed fine the value threshold give just right with the level ...
Temple three state logic ic CD4001
The work of the circuit be the circuit will use not gate IC in show supervision. In case of still have no input signal come in be liberate input pin of IC1/1 float keep. Which make have impedance very many, which have no LED anything shine come out. In first condition, If input that co ...