Re: monostable triggering



petrucci wrote:
Fred Bloggs wrote:

[CUT]
I'm sorry Fred but i don't know how must adjust it and as it is it
doesn't function :(


Well- how would I know how it should be adjusted when you say nothing about the signal levels, input timing like input duration and frequency, and 555 output pulsewidth?
I don't know where that circuit came from, but this works better on low frequency square waves:
View in a fixed-width font such as Courier.

..
..
.. 5+
.. |
.. +--------+-------+---------------.
.. | | | |
.. | | +--------------+ |
.. [10k] [100k] |rst |[1M]
.. | | | | |
.. | | | | |
.. >-+---||--[1k]--+---||---+-----+trig thesh|--+
.. | 0.1u | 0.01u | | |
.. | - .---|out dis|--+
.. | v 1n914 | | | |
.. | | | +--------------+ |
.. | |/ | |
.. '--[10k]----| 2n3904 '---------------------|------>
.. |> |
.. | ===
.. | |0.1u
.. | |
.. | |
.. | |
.. ---------------+--------------------------------+-----
.. gnd
..
..
..
..

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