danielphantom
New Member
Hello, I have seen a circuit including the two chips above that acts like a "visual effect" associated with a science fiction "universal translator". I have a functioning board that my friend bought and only see a few resistors, caps, and the two ic components. I thought it would be fun to try and breadboard a similar circuit.
When you speak the microphone (little condensor mic I believe) picks up your voice and you see the leds light up (there are 6 Leds.) With softer sounds, only one led lights up, as the volume increases--you see more and more leds light until they are all lit when you speak with a loud voice.
I have tried to hook up a basic 20 gain and 50 gain and 200 gain 386 amp and send the signal into pin 5 of the lm3914 but have had no luck at all.
I tried to make a simple amplifier with the 386, with a speaker attached with the above gains and I get a tremendous squealing from the speaker when I test it. I understand that this is unwanted oscillation and can be caused from a variety of things. I read that a cap across the battery terminals can solve some of this but bottom line I would like to know can you just simply output the 386 into the 3914.
any ideas? suggestions would be greatly appreciated.
thanks,
Daniel
When you speak the microphone (little condensor mic I believe) picks up your voice and you see the leds light up (there are 6 Leds.) With softer sounds, only one led lights up, as the volume increases--you see more and more leds light until they are all lit when you speak with a loud voice.
I have tried to hook up a basic 20 gain and 50 gain and 200 gain 386 amp and send the signal into pin 5 of the lm3914 but have had no luck at all.
I tried to make a simple amplifier with the 386, with a speaker attached with the above gains and I get a tremendous squealing from the speaker when I test it. I understand that this is unwanted oscillation and can be caused from a variety of things. I read that a cap across the battery terminals can solve some of this but bottom line I would like to know can you just simply output the 386 into the 3914.
any ideas? suggestions would be greatly appreciated.
thanks,
Daniel