Non-Inverting High Voltage Optocoupler Tri-State Switch Circuit
Fig. 1

High Voltage Optocoupler Tri-State Switching Circuit Examples


Non-inverting truth table for tri-state switch.
Fig. 2

Fig. 2 is the truth table for Fig. 1. Note the position of the one inverter (INV).

The output is non-inverting - HIGH in results in a HIGH out and vice-versa.

Inverting High Voltage Optocoupler Tri-State Switch Circuit.
Fig. 3

In Fig. 3 moving a single inverter changes the non-inverting tri-state switch to inverting output - HIGH in LOW out and vice-versa.



Inverting truth table for tri-state switch.
Fig. 4 Inverting truth table for tri-state switch.

PC817 Optocoupler.
Fig. 5 PC817 Optocoupler.

74LS00 Pin Connections
Fig. 6 74LS00 Pin Connections

CD4011 pin connections.
Fig. 7 CD4011 pin connections.

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