VARIABLE_TONE_USING_VCO

Published:2009/7/22 Author:Jessie | From:SeekIC

Tone generator uses UJT and opamp in voltage-controlled oscillator Frequency of audio output is determined by setting of R3 For two-tone siren effects, optioal switches and resistors can be used, To speed up siren effect, use smaller value for C1.－F.M Mims, Integrated Circuit Projects,vol.4, Radio Shack, Fort Worth,TX,1977,2nd Ed.p61-69.



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