phil7 Posted September 1, 2005 Report Share Posted September 1, 2005 I found the schematic for the cuckoo sound generator at the electronics-lab.com/projects/misc/011.But,when I check the schematic diagram, I found the collecotr of the Q1 was just opend and floated.Did anybody check this circuit? Is it O.K? Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 1, 2005 Report Share Posted September 1, 2005 Hi Phil,Welcome to our forum. ;DThe project is here: http://www.electronics-lab.com/projects/misc/011/index.htmlQ1 is fine. Its base-emitter junction is connected backwards so that it has avalanche breakdown like a zener diode. When it has avalanche breakdown then it makes a lot of white noise. Its collector isn't used. ;D Quote Link to comment Share on other sites More sharing options...
phil7 Posted September 2, 2005 Author Report Share Posted September 2, 2005 Thanks audioguru.I think your comment is very helpful for me ,thanks again. Quote Link to comment Share on other sites More sharing options...
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