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Logic Probe with Seven Segment Display (74LS47)

2016-12-08 22:28  
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Logic probe is circuit that indicates? the logic state of the node of any TTL logic circuit. It will work if we must supply the probe with the same power of the circuit that we want to analyze, in other words same Vcc and same GND. The “Test” wire of the probe must be connected to the desired node of the circuit that we want to check.

This article describes the Logic Probe with Seven Segment Display (74LS47). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:74LS47.

logic probe seven segment1 circuit schematic diagram

When the level is low,the green LED will be light and the probe will display a “zero” (0) and when? the level is High, the red LED will be lighted and the probe will display a “one” (1). The probe will display nothing and the bot of LED will not light. Logic level is determined by the voltage of the “Test” wire connection with something that want to be tested. here is the logic level and their voltage :

 


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