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 controls for RECORD, PLAY, VOLUME, ERASE, FORWARD, RESET and LINE/MIC input selection. Selecting a different message will override the currently playing message. Solder pads allow easy connection of your own external control buttons for RECORD, PLAY, VOLUME, ERASE & FORWARD if preferred.
If you press and hold the PLAY button it will play all messages sequentially. If you only record one message then it will be played over and over.
The sampling frequency (total record time) can be adjusted from 4 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. For practical purposes an unlimited quantity of messages can be stored (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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