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Category Archives: Tone generator circuits

  1. Jet engine sound generator

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    August 9, 2013 by todayscircuits


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  2. Door bell circuit using NE555

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    July 9, 2011 by todayscircuits


    Description. The main part of this doorbell circuit are two NE555 timer ICs.When some one presses switch S1 momentarily ,the …
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  3. UJT Organ circuit

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    June 28, 2011 by todayscircuits


    Description. Here is the circuit diagram of a simple yet interesting mini organ based on UJT 2N 4891( Q1).You can …
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  4. Canary chirp generator

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    June 28, 2011 by todayscircuits


    Description.This is a simple electronic alarm circuit that imitates the chirping of a canary. The circuit is nothing but a …
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  5. Whistle to beep circuit

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    June 28, 2011 by todayscircuits


    Description.This simple circuit produces a beeping sound that lasts for around 3 seconds whenever you make a whistle. The CMOS …
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  6. >Police siren using NE555

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    June 7, 2011 by todayscircuits


    > Description. A lot of electronic circuits using NE555 timer IC are already published here and this is just another …
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