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Home > DIY Module > Function DIY > NE555 Analog Rain Dropping Circuit Suite Bistable Simple Hypnotic Module DIY Kits Audio Sound Voice Module

NE555 Analog Rain Dropping Circuit Suite Bistable Simple Hypnotic Module DIY Kits Audio Sound Voice Module

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Description:
This circuit can simulate rain drop sound “DADA”, and the time interval is adjustable. When the interval is long, it functions like hypnosis.
So it is also called simple hypnosis circuit.

Parameter:
1>. Working voltage:DC 5V
2>. Operating Temperature:-20~85 Celsius

Operating Principle:
Circuit Principle: this circuit is taken NE555 as control core, and NE555 functions as bistable circuit.
When power on, the two ports of C1 are low level, NE555 2 pin and 6 pin are low level too; 3 pin and 7 pin are high level; power voltage can charge for C1 via R1, RP1, R2;
when the two ports voltage of C1 is higher than 2/3 power voltage, NE555 internal trigger circuit will flip, 3 pin and 7 pin output low level, then C1 will discharge via R2.

Circuit Diagram:




Component List:

No. Name PCB Marker Parameter QTY
1 Metal Film Resistor R1,R2 2K 2
2 Ceramic Capacitor C3 0.01uf 1
3 Electrolytic Capacitor C1 47uf 1
4 Electrolytic Capacitor C2 100uf 1
5 NE555 IC1 DIP-8 1
6 Potentiometer RP1 200K 1
7 DC Power Socket J1   1
8 Speaker     1
9 PCB   33*25mm 1


Finished Product Picture:
(Note: The color of the potentiometer is changed from white to blue, functions are the same, please kindly noted.)

I. Tested by ICStation's Outstanding Partner bzoli5706:



Finished Product Picture:



Connect the Audio Cable, then you could hear some voice which is similar to the rain dropping.



Rotating the potentiometer, the voice of the rain dropping will be in different frequency.

Learn More Details in the Video:


II. Tested by ICStation's Outstanding Partner Vertijog:

Learn More Details in the Video:

Quantity3+5+10+
Price$1.65$1.59$1.50
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NE555 Analog Rain Dropping Circuit Suite Bistable Simple Hypnotic Module DIY Kits Audio Sound Voice Module
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