Hi,
i have a problem regarding on my relay (or some parts of the circuit).
in my circuit, when the switch is open, the relay must be open (inactive);
when the switch is closed (and open after a few seconds), the relay should be closed (activate) for around 10seconds.
we'll, my circuit is working fine, from the start where the power source is turned on, until before the power is turned off...
MY PROBLEM is:
when i turn off the power, the relay is activating (closing), which is not supposed to happen because it ruins my project..
does the load from the relay affects the problem?
my instructor before always saying that we must always use tantalum in pin 5 of LM555, (haven't tried yet): does this affect my circuit?
**broken link removed**