@▷ Digital Logic Probe by IC TTL 7414 | Diagram for Schematic

Digital Logic Probe by IC TTL 7414

This circuit is quite useful for displaying the states of digital lines. The two 330R resistors may need to be changed as the circuit I generally use is using a tri-colour LED(3 legs) with common cathode. Other LED’s may need more or less current.

Input Output
0 Green
1 Red
Nothing No LED


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