I am new here so hello everyone! before i begin, i think its really cool that there is a forum dedicated to circuits. I am going to enjoy this forum alot as I am just getting into circuits now. anyways, here is my problem.
I am building a boom box. I am using 741CN op-amps to build my active analogue filters.
My arrangement is below:
as I am building it, the first time the whole thing worked completely. I was very pleased with it. afterwards I got crazy and introduced some audio amplifiers and a summing amplifier to do a karaoke mode. I guess my audio amplifier in front of the summer blew a few op amps so I started replacing them.
now my first low pass filter barely spits out any music. i can BARELY hear it. before it was loud and audible. that weak weak signal from the first lpf goes into my hpf, and hpf picks it up, amplifies it, and I can hear it coming out of audio amplifier.
however! the weak weak signal goes even weaker after the second lpf, which is confusing me because, 1. never happened first time I built it 2. I do not know why my lpf has blocked the signal completely.
I checked all of my connections. they are 100% correct, trust me I spent 5 hours trying to figure out why today.
since weak signal goes into second lpf, a even weaker signal comes out of second lpf, and my audio amplifier doent seem to pick it up. I do not have music coming out of my bass channel. my treble channel works flawlessly as hpf are somehow good at picking up, amplifying, and spitting out very music from very small signals.
somebody help! I have been working on fixing the problem for more than 10 hours!!!!
I am building a boom box. I am using 741CN op-amps to build my active analogue filters.
My arrangement is below:
as I am building it, the first time the whole thing worked completely. I was very pleased with it. afterwards I got crazy and introduced some audio amplifiers and a summing amplifier to do a karaoke mode. I guess my audio amplifier in front of the summer blew a few op amps so I started replacing them.
now my first low pass filter barely spits out any music. i can BARELY hear it. before it was loud and audible. that weak weak signal from the first lpf goes into my hpf, and hpf picks it up, amplifies it, and I can hear it coming out of audio amplifier.
however! the weak weak signal goes even weaker after the second lpf, which is confusing me because, 1. never happened first time I built it 2. I do not know why my lpf has blocked the signal completely.
I checked all of my connections. they are 100% correct, trust me I spent 5 hours trying to figure out why today.
since weak signal goes into second lpf, a even weaker signal comes out of second lpf, and my audio amplifier doent seem to pick it up. I do not have music coming out of my bass channel. my treble channel works flawlessly as hpf are somehow good at picking up, amplifying, and spitting out very music from very small signals.
somebody help! I have been working on fixing the problem for more than 10 hours!!!!