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Consider the circuit shown. To obtain the functionality of a RS latch with a NE555, the truth table needs to be adapted... With this you realize a classic RS latch with the NE555. |
Truth table of a RS latch with NE555. |
Circuit bistable multivibrator circuit (RS latch) with NE555. (Enlarge) |
Circuit diagram bistable multivibrator (RS latch) with NE555. |
The question remains, why should you use a NE555 as a RS latch? An important argument is the maximum load of the output OUT with 200mA. Comparable logical components (eg C-MOS 4027) can only be loaded with roughly 20mA.
The NE555 as a RS latch is therefore found in control systems (eg, elevator control).
However you are not using the the timer function. This is changing in the next experiment...
