Hi!
I need to build a timer circuit that allows a powered microphone to go live for 15 minutes when a momentary switch is pushed. An led indicator is also required to light for the 15 minute duration.
I am thinking a 555 monostable design connnected to the positive side of the mic/led power. Tried a few configurations but could do with a working prototype ASAP!!
Thanks in advance
PP
I need to build a timer circuit that allows a powered microphone to go live for 15 minutes when a momentary switch is pushed. An led indicator is also required to light for the 15 minute duration.
I am thinking a 555 monostable design connnected to the positive side of the mic/led power. Tried a few configurations but could do with a working prototype ASAP!!
Thanks in advance
PP