Your Shopping Cart Is Empty!
If you already have an account, Sign in.
If you already have an account, Sign in.
Categories
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:
| Quantity | 3+ | 5+ | 10+ |
| Price | $1.65 | $1.59 | $1.50 |
ICStation doesn't accept any form of pay on delivery. Items used to be shipped after payment. Below are the payment methods we can accept at the moment:
1) Paypal Payment
PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account).
We are PayPal Verified 
2) Bank Transfer / Wire Transfer / T/T
.jpg){kind=spacer}
Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$300. The bank will charge about US$50 for the transfer fee if we do the payment in these ways. Feel free to contact us for bank payment details if you need pay via bank.
For other payment method, please contact us at orders@icstation-team.com for more details.
