<Mod edit: The following posts were split off from the following old thread: http://www.electro-tech-online.com/threads/555-timer-false-triggers.100884/ >
I am having a similar problem. I had false triggering on my timer setup then I added a 220 microF cap. across the 6V rail as someone suggested here and it worked (schematic attached). At the time I didn't have the manual switch installed. Now when I use the manual switch it sets off the timer. Boncuk shows a schematic that isolates the trigger (pin 2 of the 555 timer) with a transistor. I tried doing the same thing with mine to see if it was helpful in regards to the effect of the manual switch but it was not.
Thanks,
Jacques
I am having a similar problem. I had false triggering on my timer setup then I added a 220 microF cap. across the 6V rail as someone suggested here and it worked (schematic attached). At the time I didn't have the manual switch installed. Now when I use the manual switch it sets off the timer. Boncuk shows a schematic that isolates the trigger (pin 2 of the 555 timer) with a transistor. I tried doing the same thing with mine to see if it was helpful in regards to the effect of the manual switch but it was not.
Thanks,
Jacques
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