Pulse generator control frequency by digital IC

This circuit uses frequency pulse generator, its continuity or Astable Multi Vibrator circuit. By the number 555 is compatible with IC1 VR1, R1, R2, and CT. The value of CT in the selection of the electronic switch circuit IC2 number 4066.Electronic switch with 4 built-in IC 2.
The control the electrical contact switches (ON), The input voltage is positive or logic “1″ to the control pin. The pin 13, 5, 6 or 12.
If the control pin to ground.Switch is turned off (OFF). Switches each, to separate the work independently, not be sorted.
And incoming (IN) and output (OUT) can be interchangeable.
It is therefore reasonable to switch the value of C values.With the input signal to the logic of digital circuits,The binary code is “0″ to “1″.
When I switch on the control of either a logic “1″, the electrical contact of the switch, then tap it. A capacitor connected to the pin switch is connected to pins 2 and 6 of IC1. To determine the frequency with VR1, R1 and R2.
Sometimes it may be the control logic “1″ rather than a pin. Makes the capacitor is connected in parallel, rather than an option. The capacity will be increased. The introduction of the C together. Circuit can reduce or increase the value of R1, R2. Or for convenience, you can adjust the resistance of VR1 at all. Signal pulse is sent out to pin 3 of IC1′s output signal. To enter the circuit, such as count circuit, divide, or be connected to the speaker. To make a sound or signal.

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