555 timer delays

berries said:

hi,

i just to wanted to know, which capacitor and resistor should i use in 555 timer to have a delay of about 30 secs if possible? or for about 15 secs before it changes its output?

hi,
Download and install from this link.
https://www.electro-tech-online.com/blogs/ericgibbs/125-simple-7555-cmos-timer-calculator-v1-2.html
thank you...

Click to expand...