Hey guys someone recommended this site to me and said you might be able to help with this problem I'm trying to tackle.
I've drawn a circuit and I don't know if it is right or not, any help would be greatly appreciated.
Situation:
A circuit that will switch on a tape recorder when the input sound level is above a certain threshold and record for a preset amount of time (adjustable in the range 1 to 10 minutes). Include a filter to stop the recorder being triggered by 100 Hz wind noise. And you use batteries for this.
Thanks in advance for any feedback on
P.S sorry the op-amp is meant to be acting as an active high-pass filter there and I would just need to add a capacitor before R1 to make it a filter right? And the Microphone symbol has been cut slightly so it is the open circle there on the left.
I've drawn a circuit and I don't know if it is right or not, any help would be greatly appreciated.
Situation:
A circuit that will switch on a tape recorder when the input sound level is above a certain threshold and record for a preset amount of time (adjustable in the range 1 to 10 minutes). Include a filter to stop the recorder being triggered by 100 Hz wind noise. And you use batteries for this.
Thanks in advance for any feedback on
P.S sorry the op-amp is meant to be acting as an active high-pass filter there and I would just need to add a capacitor before R1 to make it a filter right? And the Microphone symbol has been cut slightly so it is the open circle there on the left.