Hello. First time posting here.
About a year ago I built a similar circuit. Essentially this 40106 circuit:
http://fluxmonkey.com/electronoize/40106Oscillator.htm
And this 386 circuit:
http://fluxmonkey.com/electronoize/386amplifier.htm
And I had it working and the 3 tones from the 40106 oscillators were mixing well and the amplifier sounded fine.
Well now I've rebuilt the circuit (again on a breadboard), hoping to get it to work again 1.) the 40106 oscillators will not mix properly - only one tone will work at a time (perhaps they are feeding back into each other). I tried another 40106 chip, but I have the same problem. All the separate schmitt trigger oscillators create a tone, but they will not mix.
2.) The LM386 amplifier will work for about a 1 1/2 minutes or so and than the sound fizzles out. Then if turn it off and let it sit, then turn it back on after a few minutes, it works again for about 1 1/2 minutes, then the sound fizzles out again.
I tried buying another lm386, but it does the same thing. I've also tried connecting a Piezo contact mic - Again, the sound works for about 1 1/2 to 2 minutes and fizzles out. I've tried other configurations too.
I've been using the book Handmade Electronic Music (2nd edition) by Nicolas Collins also, which has the same kinds of designs, only slightly different when it comes to the lm386.
Is there anything to be done about these problems with the lm386 and the 40106?
Is there another amplifier I can build that runs on a 9 volt battery?
Thanks
About a year ago I built a similar circuit. Essentially this 40106 circuit:
http://fluxmonkey.com/electronoize/40106Oscillator.htm
And this 386 circuit:
http://fluxmonkey.com/electronoize/386amplifier.htm
And I had it working and the 3 tones from the 40106 oscillators were mixing well and the amplifier sounded fine.
Well now I've rebuilt the circuit (again on a breadboard), hoping to get it to work again 1.) the 40106 oscillators will not mix properly - only one tone will work at a time (perhaps they are feeding back into each other). I tried another 40106 chip, but I have the same problem. All the separate schmitt trigger oscillators create a tone, but they will not mix.
2.) The LM386 amplifier will work for about a 1 1/2 minutes or so and than the sound fizzles out. Then if turn it off and let it sit, then turn it back on after a few minutes, it works again for about 1 1/2 minutes, then the sound fizzles out again.
I tried buying another lm386, but it does the same thing. I've also tried connecting a Piezo contact mic - Again, the sound works for about 1 1/2 to 2 minutes and fizzles out. I've tried other configurations too.
I've been using the book Handmade Electronic Music (2nd edition) by Nicolas Collins also, which has the same kinds of designs, only slightly different when it comes to the lm386.
Is there anything to be done about these problems with the lm386 and the 40106?
Is there another amplifier I can build that runs on a 9 volt battery?
Thanks