The difference between the inverting and non-inverting voltage is passed from the output pin 1 of the comparator to analog pin A0 of the Arduino. Get instant insight into any electronic component. =b_imo_W`kGJN]"(^!:&0 >y?]OozELfM$WClm[.5}]]'{*IY2Y)W]; UIGf]a5g)8UrTog36GcU~\scvg9fb/ZOov'iFvk5hnaR5e~#F]GJu'#@2ZfX6zNX8[\ :8/O@C36)|X}2^|'4qD4ALw9V. Again, message is sent to an imaginary 91xxxxxxxxxx number which can be replaced with any real mobile number. Text: marketing concepts such as prepaid SIM cards, growth in the international market for GSM terminals , chipset generation for GSM The HiGOLD signal processor comprises two powerful digital signal processors with firmware containing all the DSP algorithms needed for full-rate GSM channel and speech , analog circuit contains all the A/D and D/A converters for Components 1/98 the baseband and , machines now available for GSM . The circuit working as recharge station has different components and modules connected to Arduino board in the following manner . days 15 , meter cabinet Own consumption Current circuit 0,02 VA Voltage curcuit 0,2 VA 0,1 W , CCC-module is mounted without using tools or breaking the seal of the meter . Once navigating to a desired recharge package, consumer can confirm recharge by pressing button connected to A3 pin of the Arduino UNO. The AT24C02 EEPROM IC serves as the smart recharge device in the project. The Arduino sketch of the prepaid energy meter detects the blinks and runs a counter in descending order measuring consumption of each 1 KWH or unit electricity by 3200 blinks or pulses. 
The EEMs come with an Impulse/KWH rating. A commercial version of the system can have recharge station and prepaid energy meter connected via internet. The recharge station also uses a GSM/GPRS module to send a confirmation message on every successful recharge and is connected to the prepaid energy meter via RF module to receive alert of exhausting recharge amount and the station could send an SMS to recharge soon. Only the D0 data bit of the decoder is tracked to detect the alert signal. The address byte of the decoder IC should be same as of the encoder IC to match the transmitter and receiver circuits. endobj
A setup() function is called in which the pin where tactile switch is connected is set to digital input while pins connecting D0 bit of RF encoder and relay coil are set to digital output. Text: Training Catalogue GSM , NMT and UMTS Year 2000 E Training Catalog GSM , NMT and UMTS , .169 ERA/GD/X EN/LZT 123 1210 R7B 00-12-19 Ericsson GSM /Index 1 Table of Contents , . Text: White Paper: CoolRunner CPLDs R WP118 (v1.0) May 18, 2000 Using CoolRunner CPLDs in Smart , for club membership details and then the exact amount is debited from our account using the on-card , card is classed as an integrated circuit (IC) card. The pins where tactile switches are connected are assigned to variables b1, b2, b3 and b4. }?rc1yFomj{_ f_OM@|''OoWo-lU%EPU Placing the values in above equation , Meter rating in impulse/KWH = (60 * 5.333 * 1000)/100. The pins are used for addressing individual EEPROMs when multiple EEPROMs connect to a single microcontroller at the same time. In the project, address byte of both the receiver and transmitter modules is set to 0x00. The pins 1, 2 and 3 of the EEPROM IC are connected to ground as at any time the recharge station will have only single EEPROM plugged in. Revised package contents. This rating can vary from 800 impulse/KWH to 3600 impulse/KWH. 
The main supply is resumed as the energy balance is recharged and read by the meter from recharged EEPROM. The mounting may be done by e.g, Abstract: No abstract text available %PDF-1.5
The pins where tactile switch, D0 bit if Encoder IC and relay are connected are assigned to variables b1, RFin and relay. To install the modem, do the following: 1. The write() method is used to write data and endTransmission() method is used to close the transmission. By using Infineon Technologies' s , involved, security is of the highest concern. A message prompting user to recharge energy balance is flashed on LCD. The relay and D0 bit of RF encoder is set to LOW logic by default. Yn6q7/|?~ External EEPROM AT24C02 is the external EEPROM used as the smart recharge device. 25 GSM System Survey , . else, the data read is set to 0xFF. In 10 hours, it will consume 1 KW of electricity. FUTURE , will finish the first installment by showing a practical PLL circuit using the ADF4 111 Frequency S y n , Applications Engineer- 28 (page 30] ll-Electronic Power and Energy Meters (page 64) Complete contents on page, Abstract: AUDIO MOSFET POWER AMPLIFIER SCHEMATIC gsm signal amplifier circuit diagram list of n channel power mosfet digital frequency meter circuit diagram trf7003 HP8481A 48vdc schematic diagram AUDIO MOSFET POWER AMPLIFIER SCHEMATIC schematic diagram TSC6000 Have a technical question about an article or other engineering questions? The regular EEM used in the project testing had a rating of 3200 impulse/KWH. 13 TRF7003 RF Power Amplifier 4.8 Volt GSM Application Abstract The evaluation board, Abstract: pbc 05 ericsson ericsson BTS and antenna installation Ericsson reference manual AXE 10 RBS ericsson 2202, fault codes Ericsson RBS 3202 hardware manual Ericsson RBS Integration Manual omt rbs ericsson ericsson bts RBS 2101 RBS 2202 A function eeprom_i2c_read() is defined to read data from a specific address of the EEPROM. A loop() function is called in which the digital input from the tactile switches and D0 bit of decoder IC are read using digitalRead() function. However, meters with 1000 impulse/KWH rating are gaining popularity nowadays. For simplicity, the memory system used is a memory chip. It converts the serial data back to the parallel data after separating data and addresses. If the sensor value exceeds 300, the puls variable is decremented by one and reduced balance in pulses is written back to EEPROM. If pos variable is set to 20, digital input from buttons is read and a message indicating recharge process is shown on LCD. The circuit is built on Arduino Mega and has different components and modules connected to the board in the following manner . The RF transmitter module is a small PCB sub assembly. In the program code, first the standard open-source libraries of Arduino for interfacing LCD, Virtual Serial port and serial communication are imported. The meter is full electronic without movable parts. The library works as expected and needs no changes or modifications. The lowAlertSMS() function is used to send message of low energy balance to user. The consumer needs to make a recharge before the available energy balance is exhausted. The library works as expected and needs no changes or modifications. Text: 14.4K GSM circuit switched data SMA antenna connector and SIM socket Serial interface supports DTE , accordance with GSM 07.05. It is connected to the Arduino board by connecting its data pins to pins 3 to 6 of the Arduino board. Relay Circuit A 12V 2A relay will be used to control the main supplies. mySerial.println(AT+CMGS=+91xxxxxxxxxx r); mySerial.print(Rechange Done, MRP:Rs.);// The SMS text you want to send. An object of LCD class is declared and mapped with the Arduino pins. Text: antrax Datentechnik GmbH info@antrax.de - www.antrax.de GSM /GPRS/GPS-Shield for Arduino (Rev. Once the meter reaches zero, the main supply would be automatically cut off and could be resumed only after the next recharge. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media Privacy Policy | Advertising | About Us. The RF receiver module has 8 pins and has following pin configuration . GeoCore solution makes it easy to enhance almost ANY application with location information. RF Receiver The RF receiver is used to get an alert of low energy balance from the prepaid energy meters. s SurePay TM PrePaid Service for Mobile Networks , . 
Text: Evaluation Board Documentation TRF7003 RF Power Amplifier 4.8 Volt GSM Application APPLICATION , those mandated by government requirements. The pins 5 and 6 of the EEPROM IC connect to the pin 20 and 21 of the Arduino Mega respectively where pin 20 of the board is configured to SDA and pin 21 is configured to SCL. The pins 5 and 6 of the EEPROM IC connect to the A4 and A5 pins of the Arduino where A4 is configured to SDA and A5 is configured to SCL. RF transmitter The RF transmitter will be used to transmit alert message of low energy balance to the receiver circuit. The device will have an LDR circuit assembly to detect electricity consumption by detecting blink of Imp / kWh LED on front panel of Electronic Energy Meter and will drive a relay circuit to cut off the supply from neutral wire end once the recharge energy usage balance is exhausted. The consumer needs to plug out the memory card and carry it to plug in the prepaid energy meter. endobj
This 18V DC is converted to 12V DC using a 7812 voltage regulator and is supplied to the Vin pin of Arduino UNO board and the relay. 3) Prepaid Energy Meter An embedded device that could integrate with regular household meters for reading recharge amount and tracing energy consumption in a descending order until it reaches zero. An LDR sensor changes its resistance according to the light intensity. 9l L/2RDsw*Z[Pbgkt;Rx= A loop() function is called in which the recharge balance is read from the EEPROM memory locations and recharge balance is shown on the LCD screen. The Arduino IDE is used to write the Arduino sketches for recharge station and prepaid energy meter and AVR Dude is utilized to burnt program codes to the microcontroller boards. It is designed for installation on a , is an active energy , single phase meter for direct metering up to 80A. ENSURE TOMORROW. The device is made capable to cut off the main supplies by regulating the main supplies through a relay circuit. Power Supply A step down transformer is used to convert 230v AC to 18v AC and by using a full bridge rectifier and capacitor it is converted to 18V DC. The analog voltage at A0 pin is read and converted to digital reading using analogRead() function. The pins where tactile switches and D0 bit of Decoder IC are connected are set to digital input. Through innovative Integrated Circuit (IC) products , mobile commerce applications. tampering metering detect prepaid The pin interfacing with the D0 bit of RF Decoder is assigned to variable RFin. HT12D belongs to the 212 series of decoders and can be paired with 212 series of encoders having the same number of addresses and data format. When the available electricity consumption is left 30 percent, the Arduino Mega raises the D0 bit of the RF decoder high sending an acknowledgement of low energy balance to the recharge station. mySerial.println(AT+CMGF=1); //Sets the GSM Module in Text Mode, delay(1000); // Delay of 1000 milli seconds or 1 second. eeprom_i2c_write(B01010000, 1, teriff[i]); puls=(3200*r)/6; //6 rupees per UNIT assumption. The LDR sensor is connected to non-inverting pin 2 of LM358 voltage comparator while voltage at inverting pin 3 of LM358 is passed via a variable resistance. byte eeprom_i2c_read(int address, int from_addr) {. The standard open-source library for interfacing LCD with Arduino MEGA is used in the project. Inside the function beginTransmission() method from wire library is used to initiate serial communication. The Arduino pins by default are connected to VCC and receive HIGH logic. The LCD is initialized using LCD.begin() function and initial messages indicating name of the project are flashed on the screen. The circuit developed should connect between the loads and neutral output of a regular electricity meter. A setup() function is called in which the baud rate for virtual serial port and serial transmission of data to the LCD is set to 9600 bits per second using mySerial.begin() and Serial.begin() functions respectively and communication over TWI is initialized using Wire.Begin() method. The device has an RF transmitter circuit to connect with the recharge station for sending the alert of low usage balance remaining. It is connected to the Arduino board by connecting its data pins to pins 3 to 6 of the Arduino board. x=mo?Rm/-5/n"+ZrkCgrENd\\.g8wGt-~v;]/?=_z]}BO|Yq:PM~GO_SWLU]4R~Y}S\n%>>x"Fz,x54#-NOx <>
The RW pin of the LCD is grounded. Check out our engineering forums, Getting started with MicroPython on ESP8266, How to use MicroPython with ESP8266 and ESP32 to connect to a WiFi network, Using MicroPython SSD1306 driver to interface an OLED display with ESP8266 & ESP32, How to use ESP8266s sleep modes in MicroPython, MicroPython: Time-related functions, timers & interrupts in ESP8266 and ESP32, MicroPython Reading analog signals in ESP8266 and ESP32, ESP8266/ESP32-based WiFi access point using MicroPython, How to achieve longer MCU battery life with low power sleep mode, Infineons CoolSiC devices support Deltas bi-directional inverter, Qualcomm and Mahindra to provide immersive in-vehicle experiences, Diodes launches high-efficiency synchronous boost converter, Help designing 1.6KW Isolated AC/DC with Constant Current Output, Help with Zero Crossing Detector with the 16F877A code on MPLAB XC8. Supporting data-only, these SIM cards provide a simple , pre-paid options allow you the freedom to monitor data usage without a contract and give the flexibility , Ability to change to a post paid plan Digi-Key Corporation | Pre-Paid SIM Overview 1 100's of , Corporation | Pre-Paid SIM Overview 2 Product Index Pre-paid SIM Selection Part Number Jazz, Abstract: mobile phone location "CAMEL" WIRELESS PREPAID SERVICE flexent US Marketing Services 2 0 obj
The customer , MEASURE TODAY. 1) Electricity Recharge Station An embedded device that could write recharge information to a memory system. The cause of getting high bills is usually not the high electricity rates but is the unconscious overuse of electricity. The current available balance is shown on the LCD. 3 0 obj
Therefore, the D0 bit of the encoder IC is connected to the pin 7 of Arduino MEGA. %
The device will have slot to plug in EEPROM to read and decrease recharge balance and have an LCD display to show current energy usage balance decreasing with the energy consumption. The meter makes accurate , corresponds to the selected energy type for the meter . Text: customer needs to use the TP10 clamp-on thermal energy meter with GSM wireless option. HT12E is capable of encoding 12 bits, out of them 8 are address bits and 4 are data bits. A commercial version of the system realized here can have smart cards for facilitating electricity recharges. Once the memory card is plugged in the prepaid energy meter, the Arduino MEGA controlling meter circuit reads the recharge amount from EEPROM and resumes the power supply by switching the relay. SUPERHOMODYNETM DIRECT-CONVERSION RECEIVER A functional block diagram o f the Othello dual band GSM radio , services could, in concept, occur over the GSM network using the same radio in the handset. Text: y stem .61 Microcontroller-based energy metering using the A D 7755 , . The memory card storing the recharge information can connect to the Arduino board via I2C protocol implemented on A4 and A5 pins of the Arduino. In a prepaid electricity connection, consumer would need to recharge the amount of electricity they want to consume. Integration period Energy type 5 min. In the program code, first the standard open-source libraries of Arduino for interfacing LCD, Virtual Serial port and serial communication are imported. void eeprom_i2c_write(byte address, byte from_addr, byte data) {. The 18V DC is converted to 5V DC using 7805 voltage regulator which is supplied to rest of the components. On pressing a tactile switch, the respective Arduino pin gets short-circuited to. Inside the function beginTransmission() method from wire library is used to initiate serial communication. 12 Test Bench Diagram , ). The AT2402 is 2Kb memory stick that connects with any microcontroller on I2C interface. prepaid arduino The standard commands of the GSM module are passed to it using virtual serial port. QgJ5e#)L&9ueRaUY!-Y 
)9|:q=:Q|7U ,}faMUJwI=z;A;? 4-Switch Keypad The tactile switches are used to form the keypad. Thus the encoded signal is a serialized 12-bit parallel data comprising of 4-bit data to be transferred appended with the address byte. It also supports In GSM networks, non-voice services are steadily, Abstract: sim gsm modem circuit diagram circuit diagram of moving LED message display Siemens MC75 gsm modem block diagram gsm modem sim 900 gsm modem circuit sim 300 modem datasheet at commands sim 300 gsm modem datasheet GSM module BLOCK diagram If the pulse variable is left 30 percent that is 70 percent of energy balance is consumed the D0 bit of RF encoder is set to HIGH. External EEPROM The external EEPROM will be plugged to the device and connects with the Arduino MEGA on two-wire interface. If user presses button connected to A2 pin, the pos variable is set to 20 and LCD screen is cleared.
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