State Logic | Electronic Project Circuits

Posts Tagged ‘state logic’

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”).Transistor Q1 will run the light emitting diodes (LED) LED1 receive direct bias will come out shining. Show the logic “high”(high). When the collector voltage of Q1 running it will fall.and Since the input entered at the end of probe is connected to one end of resistors R4, joint base / emitter of transistor Q2. and Light emitting diode LED2 will get back to bias Q2 and LED2 does not work.
If the input voltage to the late Four home changed to 0 volts (low-level Logistics c), then Q1 is not the current bias is not working.

Be the first to comment - What do you think? Posted by admin - March 11, 2011 at 3:52 am

Categories: Detector, Digital Tags: digital logic probe, state logic

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.

Be the first to comment - What do you think? Posted by admin - November 30, 2010 at 7:39 am

Categories: Digital, Meter Tags: digital logic probe, state logic, TTL digital circuit

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 come in be “0″ IC1/1 will get back to the position gives output be “1″ make , LED1 switch off . But LED2 the bright condition that pin 5 of IC1/2 be “1″ make pin 7 of IC1/2 be “0″ all the time cause IC1/3 and IC1/4 work give pin 11 of IC1/4 be “0″ make LED3 the bright.
If gush up that come in be “1″ IC1/1 as a result will get back to the position gives output go out be “0″ make LED1 bright the part LED2 switch off IC1/2 receive input be “0″ cause IC1/2 IC1/3 work be frequency signal generator circuit give IC1/4 for current driver give LED3 make LED3 flasher. But if input be pulse signal come in which have signal entireness low and high alternate make LED1 and LED2 stick alternate go to follow the speed of pulse that come in and LED3 condemn bright all the time.