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Two-Tone Chime Circuit - Making Easy Circuits

    https://makingcircuits.com/blog/two-tone-chime-circuit/#:~:text=Constructing%20an%20two%20tone%20electronic%20chime%20is%20easy,and%20N%203%20to%20switch%20around%201%20Hz.
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A Two-tone Oscillator

    https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/pw/1989/05/page24/index.html
    To correctly set up the two-tone oscillator you will need a calibrated oscilloscope which will be connected to the output terminals. Before inserting the operational amplifier integrated circuits into their sockets, connect the two 9 volt batteries …

A Simple Two Tone Oscillator - Internode

    http://www.users.on.net/~endsodds/twotones.htm
    The circuit diagram of the two tone generator (JPEG) The component overlay of the two tone generator (JPEG) The printed circuit track pattern (PDF) A Very High Quality Two Tone Oscillator : DOWNLOADS: This project was published in the …

Analyze This! ... Two-Tone Test Oscillator

    https://www.cwtd.org/Sep17.html
    Circuit description . Two wein-bridge audio oscillators. Identical except for frequency determining components. Uses two two-section LMC6482AIN op-amp chips. One section U1B is the 700 Hz oscillator. Frequency determined …

Two-Tone Chime Circuit - Making Easy Circuits

    https://makingcircuits.com/blog/two-tone-chime-circuit/
    Constructing an two tone electronic chime is easy due to its inexpensive parts. When you press the doorbell button, S 2, T 1 passes a logic low level to NAND gate N 1. Then, it returns with a logic high level at its output causing the oscillator which comprises N 2 and N 3 to switch around 1 Hz.

ELECRAFT 2T-gen 2-Tone TEST OSCILLATOR - RadioManual

    http://www.radiomanual.info/schemi/ACC_instrument/Elecraft_2T-gen_user.pdf
    ELECRAFT 2T-gen 2-Tone TEST OSCILLATOR Rev A, June 23, 2005 Introduction The Elecraft 2T-gen is a 2-Tone test oscillator that can be used to make distortion measurements on SSB transmitters and amplifiers. The 2T-gen is battery operated and provides sufficient output level to be connected directly to the microphone connector of almost any transceiver.

Simple Audio Amplifier/Oscilator Circuit with Two ...

    https://circuitszone.com/simple-audio-amplifier-oscilator-circuit-with-two-transistors/
    Simple Audio Amplifier/Oscilator Circuit with Two Transistors. This circuit has two main functions, namely as an audio amplifier and as an oscillator. J1 is a standard 3.5 mm jack connector. The transformers used in this circuit are Argonne AR …

Audio Oscillator | Discrete Semiconductor Circuits ...

    https://www.allaboutcircuits.com/textbook/experiments/chpt-5/audio-oscillator/
    The proper name for this circuit is “ astable multivibrator ”. It is a simple, free-running oscillator circuit timed by the sizes of the resistors, capacitors, and power supply voltage. Unfortunately, its output waveform is very distorted, neither sine wave nor square.

Simple Oscillator Circuits - Making Easy Circuits

    https://makingcircuits.com/blog/simple-oscillator-circuits/
    The two inverters widely-used to offer an amplifier which includes its input and output of the amplifier by way of TC1, and at the series resonant frequency of the crystal (where within the minimal impedance) optimistic suggestions will …

Audio oscillator circuit based on ICL8038. Square ...

    https://www.circuitstoday.com/audio-oscillator-circuit-2
    The frequency range of this circuit is 20Hz to 20KHz. POT R6 can be used for adjusting the frequency while POT R9 can be used for adjusting the distortion. POT R4 can be used for adjusting the duty cycle while POT R7 can be used for nullifying the variations in duty cycle. C2 is the external timing capacitor and R5 is a pull up resistor. Notes. The circuit can be …

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