Schematic Diagram Trigger Input Control Of 555 Timers


Posted on Feb 6, 2014

The following method allows the timer to be triggered by a normally closed switch. This would be useful in applications such as intrusion alarms where the protection circuit is broken if a window or door is opened Trigger Input Control Of 555 Timers


Schematic Diagram Trigger Input Control Of 555 Timers
Click here to download the full size of the above Circuit.




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