Feature packed non-volatile 40 second multi-message sound recorder module using a high quality ISD1740 byWinbond. Standalone operation using just six onboard buttons or the onboard SPI interface. Record using built-in microphone or external line in (best results). Speaker and analogue AUX outputs. Wide 8-24 V dc operating voltage. Adjustable sampling frequency.
These chips are designed for operation in either standalone or SPI (microcontroller) mode. This kit provides interfaces for both.
Onboard buttons for RECORD, PLAY, VOLUME, ERASE, FORWARD, RESET and slide switch for LINE/MIC input selection. Solder pads allow easy connection of your own external volt-free control buttons for RECORD, PLAY, VOLUME, ERASE and FORWARD.
Multiple Recorded Message Operation:
Single Recorded Message Operation:
The sampling frequency (total record time) can be adjusted from 4 kHz to 12 kHz (80 - 24 seconds) by changing one onboard resistor value, giving greater flexibility in duration versus recording quality.
Recordings are stored in on-chip Flash memory, providing non-volatile storage when power is removed. The audio data is stored directly without digital compression, which provides better quality voice and music reproduction. About 100,000 record cycles can be performed. See ISD1700 series datasheet timing diagrams for specific details.Specifications
|Operating Voltage||8 to 24Vdc|
|Sampling Frequency||8 kHz default|
|Message Length||40 seconds @ 8 kHz (see text)|
|SPI Mode interface||Yes|
|Input Sources||Onboard electret microphone or|
Analogue Line In
|Outputs||1. Direct drive to an 8 Ohm speaker (~ 500mW)|
2. Analogue Aux Output
|Visual Indicator||Onboard LED:|
Stays ON during recording
BLINKS during playback, etc.
|Board Dimensions||52 x 70mm|
|Board Connections||Power socket, 3.5mm mono audio jacks, screw terminal blocks and solder pads|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) or|
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
ISD1700 Series Datasheet
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