480 Seconds Voice Record/Playback Circuit with PCB Layout Using ISD17240 IC

Project has been designed for record & playback multi voice massages applications using nuvton ISD17240 IC.  Messages are stored in flash memories made in unique Multilevel Storage Technology (MLS).  Circuit  provides high quality audio recording and simple operations.  Circuit operates in dual mode standalone or micro-controller SPI mode.  Onboard tactile switches for standalone mode and 10 (2×5) pin box header connector for SPI mode.  160-480 Seconds voice massage recording capacity.

ISD1700 product is recommend for new designs in the 20 to 480 seconds storage duration (See Table1 below for cross reference parts) because of its simpler interface automatic power-down and new features such automatic message management, PWM speaker driver, volume control, vAlert, Erase operation, and configurable current (AUD) or voltage (AuxOut) output to drive external power amplifier.

NOTE : The PCB board can accommodate following ICs ISD1730, ISD1740, ISD1760, ISD17120 and ISD17240.

 

 

SAMPLING RATE SETTING TABLE

 

Specifications

  • Supply 2.4 to 5 VDC (5 VDC @ 100 mA)
  • 26 to 80 Seconds selectable voice recording capacity
  • Selectable sampling rates 4KhZ To 12Khz
  • Directly drive 8 Ohms speaker or typical buzzer
  • Analog audio out to driver external audio amplifier
  • Digital volume control via onboard tactile switch
  • Dual mode operation stand alone or micro-controller
  • SPI Interface (4 wire serial interface)
  • 10 (2×5) Pin box header for SPI interface
  • Full control on memory and analog path configuration audio input, output and mix in SPI mode
  • Automatic power-down after each operations cycle (standalone mode)
  • Onboard tactile switch for Record, Play, Erase, FWD, Volume control, Reset and Feed-Through
  • Onboard power indication, record play indication
  • Voice message fed in via microphone or analog signal in
  • ISD1740 provides a PWM class D speaker driver and speaker output simultaneously
  • 100 Years message retention
  • 100,000 Record cycles
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 80 mm x 76 mm

 

FUNCTIONS

 

SW1 (Recording)

Push switch for triggering REC function Recording initialized by HL edge of this signal, continues when it stays at L and stops when LH edge occurs or memory is full.  In standalone mode, massages are recorded sequentially until end of memory.  The location where recording of individual message starts is determine by the internal record pointer. Addressable record and playback operations are accessible only in SPI mode.

SW2 (Reset)

Push switch for triggering reset function – device enter into the initial state and initializes all pointers to the default state without erasing recording massages.

SW3 (Play)

Push switch for triggering the Play function – playback of current massage in memory.  Beginning of current massage determined by the internal playback pointer.  Short Low pulse start the playback of this massage and next pulse low stop this operation.

SW4 (Erase)

Push switch for triggering the erase function – Erasing the first or last message in memory or global erasing the all message (whole memory).  Short Low pulse erases the current message.  Holding this input for more then 3Seconds initiates the global erase operations.

SW5 (FWD)

Push switch for triggering the FWD function – Forward operations, advance to the next massage.  Short pulse causes. In standby mode advance from current message to the next message (one message forward) and setting the pointer the playback pointer on it.  During the playback-halting this process, advancing to the next massage and restarting the playback from beginning.

SW6 (Volume)

Push switch for triggering Volume – Control of audio volume on speaker output, Analog audio output and Aux/Audio output.  There are 8 steps of volume control.  Default value after power on is maximum.  Repeated low pulses decrease the level by 1 step until the minimum value reached and then increase the volume by one step until maximum value reached and so on.

SW7 (FT)

Push switch for triggering the FT function – In stand alone mode, it configures the analog path as feed-through path from ANA IN audio input to Speakers output and Aux Audio output.

 

Connections

 

Schematic

 

PCB Top Silk Screen

 

PCB Top layer

 

PCB Bottom Layer

 

Bill Of Material

 

The Nuvoton ISD1700 ChipCorder Series is a high quality, fully integrated, single-chip multi-message voice record and playback device ideally suited to a variety of electronic systems. The message duration is user selectable in ranges from 26 to 120 seconds, depending on the specific device. The sampling frequency of each device can also be adjusted from 4 kHz to 12 kHz with an external resistor, giving the user greater flexibility in duration versus recording quality for each application. Operating voltage spans a range from 2.4 V to 5.5 V to ensure that the ISD1700 devices are optimized for a wide range of battery or line-powered applications.

The ISD1700 is designed for operation in either stand-alone or micro-controller (SPI) mode. The device incorporates a proprietary message management system that allows the chip to self-manage address locations for multiple messages. This unique feature provides sophisticated messaging flexibility in a simple, push-button environment. The devices include an on-chip oscillator (with external resistor control) , microphone preamplifier with Automatic Gain Control (AGC) , an auxiliary analog input, anti-aliasing filter, Multi-Level Storage (MLS) array, smoothing filter, volume control, Pulse Width Modulation (PWM) Class D speaker driver, and current output.

 

 

My 5 Axis CNC Milling _ CNC Router Controller_ Mach3_Mach4_UCCNC machine control software

5 Axis CNC Controller Box Mach3/Mach4 , Bipolar Stepper Driver Based , USB/LPT This pre-wired 4Axis stepper motor control box has everything you need to drive a  CNC Milling machine, CNC Router and motion control – with 4 stepper driver, one power supplies, e-stop, power plugs, limit switch, parallel port input or USB/LAN Optional. This unit is expandable to your needs, versatile, and flexible. The Unit CNC Controller includes 4×4.2amp micro-stepping Bipolar Drivers at defaults, giving you versatility. Have a machine with two motors driving the gantry? No problem. You will still have a spare back-up driver for high-reliability, or use the spare for a rotary axis, and still be able to swap it over as a backup in case you have a driver failure in a high-reliability production environment. This unit comes with breakout board that can be configured for parallel control or optional USB-control.

Features

  • 4X4,2Amps Stepper Motor Driver
  • 1X 7.2Amps Stepper Motor Driver
  • Compatible with Mach3_Mach4_UCCCNC Software
  • Connector for 230V AC supply input
  • 4 PIN Female XLR connectors for stepper motor connection
  • 9 PIN D Sub Connector for Limit Switches
  • 9 Pin D Sub connector for Emergency switch
  • 24V 14Amps SMPS for Motors
  • Onboard 24V to 5V DC-DC Converter
  • On/Off Switch

INVERTING AMPLIFIER SCHEMATIC PCB CALCULATION USING TLV170

INVERTING AMPLIFIER SCHEMATIC PCB CALCULATION USING TLV170

Design Description

This design inverts the input signal, Vi, and applies a signal gain of –2V/V. The input signal typically comes from a low-impedance source because the input impedance of this circuit is determined by the input resistor, R3. The common-mode voltage of an inverting amplifier is equal to the voltage connected to the non-inverting node, which is ground in this design. D1 indicates the power, all connection can be done using CN1 header connector, Capacitors, Resistors, LEDs are SMD components size 0805. Op-Amp TLV170 from Texas Instruments.

D1=Power LED, CN1= 6 Pin male header connector

DESIGN GOALS
ViMIN=-7V, ViNMAX=7V, VoMIN=–14V, VoMAX=14V, F=3KHZ, V+=15V, V-=-15V

Design Notes

  1. Use the op amp in a linear operating region. Linear output swing is usually specified under the AOL test conditions. The common-mode voltage in this circuit does not vary with input voltage.
  1. The input impedance is determined by the input resistor. Make sure this value is large when compared to the source’s output impedance.
  1. Using high value resistors can degrade the phase margin of the circuit and introduce additional noise in the circuit.
  1. Avoid placing capacitive loads directly on the output of the amplifier to minimize stability issues.
  2. Small-signal bandwidth is determined by the noise gain (or non-inverting gain) and op amp gainbandwidth product (GBP). Additional filtering can be accomplished by adding a capacitor in parallel to R1. Adding a capacitor in parallel with R1 will also improve stability of the circuit if high value resistors are used.
  1. Large signal performance may be limited by slew rate. Therefore, check the maximum output swing versus frequency plot in the data sheet to minimize slew-induced distortion.
  1. For more information on op amp linear operating region, stability, slew-induced distortion, capacitive load drive, driving ADCs, and bandwidth please see the Design References section.

 

 

 

Application Courtesy of Texas Instruments

 

 

 

 

Window Comparator/Voltage Sensitive Switch TLV1701

Window Comparator/Voltage Sensitive Switch TLV1701

This circuit utilizes two comparators in parallel to determine if a signal is between two reference voltages. If the signal is within the window, the output is high. If the signal level is outside of the window, the output is low. For this design, the reference voltages are generated from a single supply with voltage dividers.

This 5V single-supply window comparator utilizes a dual open-collector comparator and two trimmer potentiometer to set the  window voltage. 2X TLV1701 was used in this design due to its low power consumption and open collector output, which allows the output to be pulled up as high as 36 V.

 

 

 

 

 

 

 

Example Circuit From Texas Instruments

 

Light Effects and Sound Effects Arduino Nano

Light Effects and Sound Effects Arduino Nano shield, shield contains 11 LEDs ,one buzzer and INA198 current measurement , shield can be used to develop various projects like LED Bar-graph Volt Meter, Bar-Graph Current Meter, LED light effects, Warning light and sound.

Download Data Sheet INA198 Current Sensor

  • Supply 5V DC
  • 11 LEDS Connected to D2-D12 Digital Pins Of Arduino Nano
  • Buzzer Connected to Digital Pin D13 to Arduino

 

 

 

 

ARDUINO CODE


*/

int led = 13;
int led2 = 2;
int led3 = 3;
int led4 = 4;
int led5 = 5;
int led6 = 6;
int led7 = 7;
int led8 = 8;
int led9 = 9;
int led10 = 10;
int led11 = 11;
int led12 = 12;

// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
pinMode(led7, OUTPUT);
pinMode(led8, OUTPUT);
pinMode(led9, OUTPUT);
pinMode(led10, OUTPUT);
pinMode(led11, OUTPUT);
pinMode(led12, OUTPUT);

}

// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH);
delay(50);
digitalWrite(led, LOW);
delay(100);
digitalWrite(led, HIGH);
delay(90);
digitalWrite(led, LOW);
delay(60);
digitalWrite(led, HIGH);
delay(150);
digitalWrite(led, LOW);
delay(20);
digitalWrite(led, HIGH);
delay(120);
digitalWrite(led, LOW);
delay(70);
digitalWrite(led, HIGH);
delay(10);
digitalWrite(led, LOW);
delay(50);
digitalWrite(led, HIGH);
delay(250);
digitalWrite(led, LOW);
delay(90);
digitalWrite(led, HIGH);
delay(100);
digitalWrite(led, LOW);
delay(130);
digitalWrite(led, HIGH);
delay(20);
digitalWrite(led, LOW);
delay(90);
{digitalWrite(led2, HIGH);
delay(100);
digitalWrite(led2, LOW);
delay(100);}
{digitalWrite(led4, HIGH);
delay(100);
digitalWrite(led4, LOW);
delay(100);}// wait
{digitalWrite(led5, HIGH);
delay(100);
digitalWrite(led5, LOW);
delay(100);}// wait
{digitalWrite(led6, HIGH);
delay(100);
digitalWrite(led6, LOW);
delay(100);}// wait
{digitalWrite(led7, HIGH);
delay(100);
digitalWrite(led7, LOW);
delay(100);}// wait for a second
{digitalWrite(led8, HIGH);
delay(100);
digitalWrite(led8, LOW);
delay(100);}// wait
{digitalWrite(led9, HIGH);
delay(100);
digitalWrite(led9, LOW);
delay(100);}// wait
{digitalWrite(led10, HIGH);
delay(100);
digitalWrite(led10, LOW);
delay(100);}// wait
{digitalWrite(led11, HIGH);
delay(100);
digitalWrite(led11, LOW);
delay(100);}// wait
{digitalWrite(led12, HIGH);
delay(100);
digitalWrite(led12, LOW);
delay(100);}// wait
}

 


 

 

 

 

 

LED SEQUENCER USING 11 LED WITH BUZZER SOUND USING ARDUINO NANO

LED SEQUENCER USING 11 LED WITH BUZZER SOUND USING ARDUINO NANO,

Light Effects and Sound Effects Arduino Nano shield, shield contains 11 LEDs ,one buzzer and INA198 current measurement , shield can be used to develop various projects like LED Bar-graph Volt Meter, Bar-Graph Current Meter, LED light effects, Warning light and sound.

Download Data Sheet INA198 Current Sensor

  • Supply 5V DC
  • 11 LEDS Connected to D2-D12 Digital Pins Of Arduino Nano
  • Buzzer Connected to Digital Pin D13 to Arduino

 

 Note : Don’t populate parts showan in doted box

11 LED SEQUENCER WITH SOUND ARDUINO NANO SCHEMATIC

 

11 LED SEQUENCER WITH SOUND ARDUINO NANO PCB TOP LAYER

 

 

ARDUINO CODE FOR 11 LED SEQUENCER AND BUZZER WARNING


*/

int led2 = 2; // LED connected to digital pin 2
int led3 = 3; // LED connected to digital pin 3
int led4 = 4; // LED connected to digital pin 4
int led5 = 5; // LED connected to digital pin 5
int led6 = 6; // LED connected to digital pin 6
int led7 = 7; // LED connected to digital pin 7
int led8 = 8; // LED connected to digital pin 8
int led9 = 9; // LED connected to digital pin 9
int led10 = 10; // LED connected to digital pin 10
int led11 = 11; // LED connected to digital pin 11
int led12 = 12; // LED connected to digital pin 12
int led13 = 13; // BUZZER connected to digital pin 13

void setup()
{
pinMode(led2, OUTPUT); // sets the digital pin as output LED
pinMode(led3, OUTPUT); // sets the digital pin as output LED
pinMode(led4, OUTPUT); // sets the digital pin as output LED
pinMode(led5, OUTPUT); // sets the digital pin as output LED
pinMode(led6, OUTPUT); // sets the digital pin as output LED
pinMode(led7, OUTPUT); // sets the digital pin as output LED
pinMode(led8, OUTPUT); // sets the digital pin as output LED
pinMode(led9, OUTPUT); // sets the digital pin as output LED
pinMode(led10, OUTPUT); // sets the digital pin as output LED
pinMode(led11, OUTPUT); // sets the digital pin as output LED
pinMode(led12, OUTPUT); // sets the digital pin as output LED
pinMode(led13, OUTPUT); // sets the digital pin as output BUZZER
}

void loop()
{
digitalWrite(led2, HIGH);
delay(100);
digitalWrite(led2, LOW);
delay(100);
digitalWrite(led3, HIGH);
delay(100);
digitalWrite(led3, LOW);
delay(100);
digitalWrite(led4, HIGH);
delay(100);
digitalWrite(led4, LOW);
delay(100);
digitalWrite(led5, HIGH);
delay(100);
digitalWrite(led5, LOW);
delay(100);
digitalWrite(led6, HIGH);
delay(100);
digitalWrite(led6, LOW);
delay(100);
digitalWrite(led7, HIGH);
delay(100);
digitalWrite(led7, LOW);
delay(100);
digitalWrite(led8, HIGH);
delay(100);
digitalWrite(led8, LOW);
delay(100);
digitalWrite(led9, HIGH);
delay(100);
digitalWrite(led9, LOW);
delay(100);
digitalWrite(led10, HIGH);
delay(100);
digitalWrite(led10, LOW);
delay(100);
digitalWrite(led11, HIGH);
delay(100);
digitalWrite(led11, LOW);
delay(100);
digitalWrite(led12, HIGH);
delay(100);
digitalWrite(led12, LOW);
delay(100);
digitalWrite(led13, HIGH);
delay(100);
digitalWrite(led13, LOW);
delay(100);
}

 

 

ARDUINO NANO LED WARNING LIGHT WITH BUZZER 11 LED SEQUENCER

Project published here is simple 11 LED and Buzzer shield for Arduino Nano, shield can be used as bar-graph monitor, buzzer sound effects, the simple example code used to show warning LED including buzzer sound. Circuit works with 5V DC. Shield also provided current sensor circuit which is no use in this project can be abandon. All LEDs 1206 SMD, All resistor are 0805 SMD.

Light Effects and Sound Effects Arduino Nano shield, shield contains 11 LEDs ,one buzzer and INA198 current measurement , shield can be used to develop various projects like LED Bar-graph Volt Meter, Bar-Graph Current Meter, LED light effects, Warning light and sound.

Download Data Sheet INA198 Current Sensor

  • Supply 5V DC
  • 11 LEDS Connected to D2-D12 Digital Pins Of Arduino Nano
  • Buzzer Connected to Digital Pin D13 to Arduino

Note : Don’t populate the parts shown in doted box, those parts can be used for current measurement.

 

11 LED AND BUZZER ARDUINO SHIELD FOR NANO SCHEMATIC

 

 

Download PDF Schematic

 

 

 

 

11 LEDs and Buzzer Warning Light Arduino Code, 11 LED Sequencer Arduino Code

LEDs Connected to Pin D2-D12 and Buzzer Connected to D13


/* A simple program to sequentially turn on and turn off 11 LEDs and Sound Buzzer */

int LED1 = 13;
int LED2 = 12;
int LED3 = 11;
int LED4 = 10;
int LED5 = 9;
int LED6 = 8;
int LED7 = 7;
int LED8 = 6;
int LED9 = 5;
int LED10 = 4;
int LED11 = 3;
int LED12 = 2;

void setup() {
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(LED5, OUTPUT);
pinMode(LED6, OUTPUT);
pinMode(LED7, OUTPUT);
pinMode(LED8, OUTPUT);
pinMode(LED9, OUTPUT);
pinMode(LED10, OUTPUT);
pinMode(LED11, OUTPUT);
pinMode(LED12, OUTPUT);
}

void loop() {
digitalWrite(LED1, HIGH);
delay(60);
digitalWrite(LED2, HIGH);
delay(60);
digitalWrite(LED3, HIGH);
delay(60);
digitalWrite(LED4, HIGH);
delay(60);
digitalWrite(LED5, HIGH);
delay(60);
digitalWrite(LED6, HIGH);
delay(60);
digitalWrite(LED7, HIGH);
delay(60);
digitalWrite(LED8, HIGH);
delay(60);
digitalWrite(LED9, HIGH);
delay(60);
digitalWrite(LED10, HIGH);
delay(60);
digitalWrite(LED11, HIGH);
delay(60);
digitalWrite(LED12, HIGH);
delay(60);
digitalWrite(LED1, LOW);
delay(60);
digitalWrite(LED2, LOW);
delay(60);
digitalWrite(LED3, LOW);
delay(60);
digitalWrite(LED4, LOW);
delay(60);
digitalWrite(LED5, LOW);
delay(60);
digitalWrite(LED6, LOW);
delay(60);
digitalWrite(LED7, LOW);
delay(60);
digitalWrite(LED8, LOW);
delay(60);
digitalWrite(LED9, LOW);
delay(60);
digitalWrite(LED10, LOW);
delay(60);
digitalWrite(LED11, LOW);
delay(60);
digitalWrite(LED12, LOW);
delay(60);
}

 

 

20Amps H-Bridge DC Motor Driver with Current and Fault Feedback Using IR2104-IR2101 IRFP4468

H-Bridge has been designed around IR2104 IC from international Rectifier, The board has been made mainly for DC-Motor Driver application, the driver can handle load up to 20 Amps, I have tested this board with 90V DC supply. The circuit uses N Channel IRFP4468 MOSFETS from international rectifier. MOSFET required large size heat sink.   Board has shunt resistor and signal conditioning circuits to provide voltage proportional to current passing through load. Comparator provides fault output, normally fault output is high goes low when its detect the over current passing through output..

FEATURES

  • Motor DC Supply 12V To 90V DC (Screw Terminal Connector)
  • Logic Supply 12V DC
  • Load 20 Amps (Screw Terminal Connector)
  • Fault Output Normally High, Goes Low When Over Current/Short Occurs
  • Current Feedback Output 200mv/1Amp ( If R5 Current Sense 0.01E)
  • Header Connector for Inputs (7 Pin Header Connector)
  • On Board Shunt Resistor for Current feedback
  • PWM Frequency 10 to 20 KHz
  • Duty Cycle 0-99%
  • Logic Pins support 3.3V, 5V, 12V (Inputs and PWM)

Connections

  • CN1 Supply Input
  • CN3 Logic Inputs, Current Feedback Output
  • CN2 Motor/Load Connections

CN3 Connections

Pin 1 Load Supply, Pin 2 GND, Pin 3 12V Gate Driver Supply, Pin 4 Input-1, Pin 5 SD1 Shutdown Input ( If IR2104 Used), Pin 6 Input 2, Pin 7 Shutdown Input ( If IR2104 Used), Pin 8 GND, Pin 9 Current Feed Back Output, Pin 10 Fault/Over Current Output, Pin 11 5V DC Output, Pin 12 Voltage Feedback Output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOICE ECHO GENERATOR- SOUND TO ECHO SOUND CONVERTER CIRCUIT

A project has been designed around Holtek,s HT8970 voice echo IC.  Project can be used in various audio systems karaoke, toys, Animatronics, shows, displays, exhibitions, and sound equipment’s. The HT8970 is an echo/surround effect processor. It is designed for various audio systems including karaoke, television, sound equipment’s, etc. The chip consists of a built-in pre-amplifier, VCO or Voltage Control OSC, 20Kb SRAM, A/D and D/A converters as well as delay time control logic. The HT8970 chip echo processor IC utilizing CMOS technology. Which accept analog audio input signal, a high sample rate ADC transfer the analog signal into a bit stream then storage to internal  RAM, after processing the bit stream will de-modulate by DAC and low pass filter. Overall delay time is determined by internal VCO clock frequency, and user can easy to change the VCO frequency by trimmer pot. Jumper J1 provided to select the Microphone input or External audio signal input, CN1 Audio Signal input, PR1 Audio signal level adjust, PR2 output audio signal adjust, PR3 sound delay adjust,

DOWNLOAD DOCUMENT AND SCHEMATIC

DOWNLOAD PDF DATA SHEET HT8970

FEATURES

  • Supply Input 5V DC
  • Onboard MIKE and Aux audio input ( Dual Option Selecting using Jumper)
  • MIKE and Aux  Selection via jumper
  • Input/MIKE signal level adjustable using Trimmer Potentiometer
  • It works in two modes – echo or surround
  • On Board Output signal level adjust Trimmer Pot
  • Onboard Trimmer Pot  for Sound Delay Adjust
  • Onboard LED for Power Supply Indicator
  • Four mounting holes of 3.2 mm
  • PCB dimensions 79 mm x 70 mm

 

 

 

 

 

 

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