yes, what IanP said is quite right.
I'm very familar with 555 timer, it's
a great little IC, it has been invented for
about forty years. it has many use.
the monostable and astable are
two operating mode of a 555 timer.
and a 555 timer can be use as a RS latch.
now, talk about your question.
1) monostable : mean that the circuit has
a stable state. for 555 timer,
this state is low output state.
when a 555 timer use as a one-shot,
after a signal triggered the circuit,
the circuit will output a high level
pulse, then go back to low output state.
the pulse's width is determined by external
RC parameter.
2) astable: when a 555 timer use as a oscillator,
its output will swicthing between high state and
low state periodically, THE CIRCUIT DO NOT EXIST
A STABLE STATE if begin operate.
3) RS latch: when a 555 timer is used as a RS latch,
as we know, it will has two stable state,
high state and low state.
oh, perhaps it will exist a metastable state
in some special cases. but that beyond our
discussion.
best regards
nutty boy said:
Hi
Can someone pls tell me what's the difference between monostable mode and astable mode in 555 timer circuits