This suite 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.
1.Operating Voltage: DC 3-5V
|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|
|5||ISD1820||U1||DIP-14||1||Install on IC socket|
|9||Ceramic capacitors||C1,C2,C3||0.1uf 104||3|
|10||Ceramic capacitors||C5||0.001uf 102||1|
NOTE:You can complete the installation by PCB silk screen and component listing.
Finished Product Picture:
Tested by ICStation's Outstanding Partner LearningZone:
Learn More Details in the Video:
First we should say that ICStation doesn't accept any form of pay on delivery.Items used to be shipped after receiving the order info and payment.
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) West Union
We know that some of you do not have the Paypal account.
Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$500. The bank will charge about US$60 for the transfer fee if we do the payment in these ways.
For other payment method, please contact us at email@example.com for more details.
1. Yanwen / YunExpress / 4PX / China Post Airmail Service
(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $5 is for tracking number and delivery insurance ^0^ Enjoy order from us.
Free Shipping for all orders over $20 ^0^ (with free tracking number and delivery insurance fee)
(2) Shipping time
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location.
7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries
2. DHL/FedEx Express
(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG
When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country.
Asia: Japan , South Korea , Mongolia . Malaysia , Singapore , Thailand , Vietnam , Cambodia , Indonesia , Philippines
Oceania: Australia , New Zealand , Papua New Guinea
Europe& America: Belgium, Britain, Denmark, Finland, Greece, Ireland, Italy, Luxembourg, Malta, Norway, Portugal, Switzerland, Germany, Sweden, France, Spain, USA, Austria, Canada
Note: Shipping Fee to other countries, please contact orders@ICStation.com
(2) Shipping Time & Delivery Time
Because the package would be returned to the sender if it had not been signed by the receiver , please pay attention to the arriving time of the package.
1) APO and PO Box Addresses
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed.
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc.
3) Once your order is shipped, you will receive an email notification from icstation.com
4) Track the order which with tracking number via below links: