Hello here. Am new in this site and i am a beginer in electronics. I am trying to build a sound activated alarm system, with 9v battery as the power supply. I have been able to build the amplifier with the use of lm386 and 741, on which i used electrect mic. I'v built two diffferent oscillators for the alarm.
My troubles have being swithching the oscillator with the signal from the amplifier.
I want a transistor latch switching system, such that when the mic signal is fed to the switch via the amplifier, the transistor will switch the oscillator on untill the rest button is pressed. I have atrnsistor bc141 and 2n2222.
I will be happy for assistance from anyone in the house.
thank you.
My troubles have being swithching the oscillator with the signal from the amplifier.
I want a transistor latch switching system, such that when the mic signal is fed to the switch via the amplifier, the transistor will switch the oscillator on untill the rest button is pressed. I have atrnsistor bc141 and 2n2222.
I will be happy for assistance from anyone in the house.
thank you.