Contents
Voice Module ISD18B20-Record/Playback Device
The Voice module board is based on ISD18B20, which is a single-chip single-message record/playback device.
Recordings are stored into on-chip non-volatile memory, providing zero-power message storage. With the embedded Flash memory employed, data retention up to 100 years and typical 100,000 erase/record cycles can be reached.
Time for recording is 8-20 seconds.
Specifications:
1. On-board ISD1820 chip
2. On-board microphone, can directly recording voice
3. Can play a recording up to 10 seconds
4. High-quality, natural voice restore, can be used as a propaganda module
5. With a loop playback, jog play, single-pass playback mode
The pins are leaded out:
1. Working voltage: 3V-5V DC
2. Pin Description
3. MOD-0012.jpg
4. VCC: 3V-5V DC
5. GND: ground
6. LED: LED (D1)
REC:
The REC input is an active-HIGH record signal. The device records whenever REC is HIGH. While the button is pressed (or a high signal is on the pin), the device is recording. The maximum recording-length is approx. 10 seconds. This pin must remain HIGH for the duration of the recording. If REC is pulled HIGH during a playback cycle,the playback immediately ceases and recording begins. The device automatically powers down to standby mode when REC goes LOW. This pin has an internal pull-down device. Holding this pin HIGH will increase standby current consumption.
PLAYE:
active-HIGH playback, edge-activated signal. When a HIGH-going transition is detected on this input pin,a playback cycle begins.i.e A single push (or a single high signal on the pin) does start the playback of the entire message. Upon completion of the playback cycle, the device automatically powers down into standby mode. Taking PLAYE LOW during a playback cycle will not terminate the current cycle. This pin has an internal pull-down device. Holding this pin HIGH will increase standby current consumption.
PLAYL:
active-HIGH playback, level-activated signal.When this input pin level transits from LOW to HIGH, a playback cycle is initiated. The recorded message is played back while the button is pushed or the signal is on high. The device automatically powers down to standby mode upon completion of the playback cycle. This pin has an internal pull-down device. Holding this pin HIGH will increase standby current consumption.
FT: active-HIGH feed through.This mode allows use of the speaker drivers for external signals.To operate this mode, the control pins REC, PLAYE and PLAYL are held LOW at Vss. The pin FT is held HIGH to Vcc. For normal operation of record, play and power down, the FT pin is held at Vss. The FT pin has a weak pull-down to Vss.
How to connect ISD1820 Voice Module to Arduino Uno?
1. ISD1820 Voice Module
2. Arduino Uno
3. Arduino IDE(1.0.6V)
4. Hardware Connections
The ISD1820 Voice Module should be connected to Uno board as follows:
1. Vcc to 5V
2. Gnd to Gnd
3. Rec to digital pin 11
4. P-E to digital pin 13
Program for ISD1820 Voice Module:
After making the connections,upload the program given below to the Arduino Uno board.As soon as the code has been uploaded to the board the user need to record the voice as per their desire which was indicated by the led present in the voice module.Here the duration for recording is 10 seconds.After a second the recorded voice will be played as an output.Then the process goes on like a loop.The user can change the time for record and play mode as per their wish.
CODE:
int Rec = 11;
int Play = 13;
void setup()
{
pinMode(Rec, OUTPUT);
pinMode(Play, OUTPUT);
}
void loop()
{
digitalWrite(Rec, HIGH);
delay(10000);
digitalWrite(Rec, LOW);
delay(1000);
digitalWrite(Play, HIGH);
delay(10000);
digitalWrite(Play, LOW);
delay(10000);
}
