Sound Generator with IC 555

Fri, 11 Sep 2009 02:38:33 +0000

This is a sound generator based on general purpose timer IC 555. A flip-flop circuit is included, so this circuit will give sound output and blinking LED.? There are 2 modules in this circuit that are flip-flop / LED flasher module and sound generator circuit modules which combined in one schematic diagram. This is a simple project for beginner which can be seen and can be heard.

Sound Generator Components List:

Resistors:
R1, R7 ___________________ 470?
R2 _______________________ 1k?
R3 _______________________ 68?
R4, R6 ___________________ 56k?
R5 _______________________ 47k?
R8, R9 ___________________ 10k?
VR1 ______________________ 200? Potentiometer

Capacitors:
C1, C2, C3 _______________ 10uF/16V
C4, C5 ___________________ 0.02uF (20nF)
C6 _______________________ 100uF/16V

Semiconductors:
Q1, Q2 ___________________ 2N3904
IC1 ______________________ 555 or 1455
LED1, LED2 _______________ LED

Good Luck

The post Sound Generator with IC 555 first appeared on Electronic Schematic Diagram.

Analog Flip-Flop

Mon, 29 Jun 2009 01:10:17 +0000

Here the analog flip-flop circuit which built based on 2 transistors work as switch. This is very easy made and very cheap circuit. You can use this circuit as “the first project” for your students…

and the result should be like this:

Replace the Resistor 10K with variable resistor 20K or replace the electrolytic capacitor 100uF with other value for change the frequency of LED’s flash.

Flip flop PCB layout:

The post Analog Flip-Flop first appeared on Electronic Schematic Diagram.

flip-flop | Electronic Schematic Diagram

Sound Generator with IC 555

Analog Flip-Flop