Your Shopping Cart Is Empty!
If you already have an account, Sign in.
If you already have an account, Sign in.
Categories
Description:
This kit adopts 20s voice recording circuit ISD1820P to achieve the save and restore of voice signal.
The chip adopts CMOS technique, the no power consumption information can be saved for 100 years.
Integrated circuit pin function is:
11 pin is power positive (VCC); 8, 14 pin connects power negative (GND);
1 pin is recording port (REC), high level valid; when the REC gets higher, the chip will start recording;
2 pin is edge trigger play (PLAYE); when this port has high level, the chip will start playing the voice;
after playing, it can release PLAYE;
13 pin is recording indication port (RECLED); when it is on recording state, this port is low, and it can drive LED;
4, 5 pin connects microphone input port (MIC);
6 pin connects auto gain control (AGC) port;
7, 9 pin connect loudspeaker output (SP+, SP-), and it can directly more than 8 ohm loudspeaker;
10 pin connects oscillation resistor (ROSC), connect oscillation resistor to GND.
Adjust oscillator resistor R4 connected with ROSC, it can stepless adjust the voice speed; the shorter of the recording voice, the better of the sound quality will be; otherwise, it will be worse.
Note: please do not adjust the resistor for too small, we recommend more than 100K ohm.
Parameter:
Operating Voltage: DC 3-5V
Component List:
| NO. | Component Name | PCB Marker | Parameter | Quantity | Remarks |
| 1 | Metal film resistors | R1 | 470ohm | 1 | |
| 2 | Metal film resistors | R2 | 100K | 1 | |
| 3 | Metal film resistors | R3,R4 | 4.7K | 2 | |
| 4 | IC Socket | U1 | DIP-14 | 1 | |
| 5 | ISD1820 | U1 | DIP-14 | 1 | Install on IC socket |
| 6 | Switch | S1,S5 | 3mm | 2 | |
| 7 | Male Pin | J1 | 5P | 1 | |
| 8 | Cable | 4 | |||
| 9 | Ceramic capacitors | C1,C2,C3 | 0.1uf 104 | 3 | |
| 10 | Ceramic capacitors | C5 | 0.001uf 102 | 1 | |
| 11 | Electrolytic capacitor | C4 | 10uF | 1 | |
| 12 | Speaker | SP | 8ohm 0.5W | 1 | |
| 13 | Microphone | MIC | 5mm | 1 | |
| 14 | Button | S2,S3,S4 | 6*6mm | 3 | |
| 15 | LED | LED | 3mm | 1 | |
| 16 | PCB | 45*34mm | 1 |
NOTE:You can complete the installation by PCB silk screen and component listing.
Circuit Diagram:
Finished Product Picture:
Tested by ICStation's Outstanding Partner LearningZone:
Learn More Details in the Video:
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.
