If we want to be a producer,This circuit would be a good starting point to composed music for 1000 tracks.
As Figure 1 is a common circuit. Which will see them always when use LED running. We will use an IC-555 timer and IC-4017 Decade Counter Divider with 10 Decoded as sound effect generator with adjusting tone music with a tempo slow – fast as you want it to VR11. And VR1-VR10 to adjust the tone according to need more than 1000 tone.
Figure 1 is the simple sound effect generator circuit using IC-555 and IC-4017
This circuit can be used as an various alarms. We will see that use a lot of a variable resistors or potentiometers. But it’s better than using a fixed value resistor then got bored listening to only 2-3 times. The value of VR1-VR10 will use no more than 100K. Because if it more than this will cause IC3 generate the frequency is lower than 100Hz which we will listen don’t as music.
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Donkey sound effect project
This is a donkey sound effect project that easy to builds because use simple components include three IC-555 and LM386 and more little parts. Although at present we use Micro controller IC because small. But some times it is hard to find, so this circuit is suitable for everyone.
How it works
In Figure 1 the schematic diagram of this projects.
When press switch S1 to apply power to this project. The operation of IC1 will be 2 ranges.
– First the high voltage is shown at pin 3 until full time (about 2 second), Then switch to the low voltage automatically. This times is controlled by R1,R2 and C1, C2
This high and low voltage from pin 3 of IC1. We will take it to controlled IC2 and IC3 again, by through diode D1 and VR1 to pin 5 of both IC. Which D1 act as protect external voltage backward to IC1
While IC2 and IC3 are connected to others parts that controlled it generate the high and low frequency as voltage from pin 5.
If high voltage IC will generate high frequency and if low voltage the frequency is low.
Both IC2 and IC3 same work. Because we want realistic sound, Create a two frequency range with a frequency similar to simultaneously make it sound like a chorus.
The IC4 acts amplifier IC2 and IC3 frequency of the speaker, the VR3 as a control signal voltage level before expanding.
Parts you will need
Resistors 0.25W 5%
R3, R4, R6: 10K
R5: 270 ohms
R8: 27 ohms
C4,C7: 10uF 16V
C8: 220uF 16V
C1,C2: 0.22uF 50V
C3: 0.056uF 50V
C5: 0.047uF 50V
C6: 0.047uF 50V
IC1, IC2, IC3: NE555 Timer
IC4: LM386 Amplifiers
SP1- 8 ohms speaker
PCB and more
How to builds
First you need to make a PCB as Figure 2 then assemble all parts on it as Figure 3 , next connect more wire and speaker. Next check for error. Then apply power to the circuit.
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