Modem Circuits

Quick view of FLASH FLOOD INTIMATION OVER GSM NETWORK

The main objective of this project is to detect rising water level in a river at a reasonable distance from the rail track/ roadways and intimate that to the respective authorities through SMS, to take appropriate action. For example, railways face major challenges in prior detection of possible flash flood along the track, which might cause accidents. In this proposed system, water level....

Modem shutdown Indicator

The circuit has been designed to accommodate all those who dedicate many hours of their lives by exploring the endless pages of this site. Despite the fact that it consists of only three components (Most were not little!), Is able to provide an indication of whether it actually released the telephone line after a long connection via modem to the network. This can be particularly useful, since....

autodetects baud rate circuit MAX202 and PIC16C54

Modem based on PIC16C620

No description available...

WA4DSY 56KB RF Modem

This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band. The digital interface is synchronous serial. The modem supplies TX and RX clocks. For more details see the various links below...

Packet Radio with AVR

Here is some experimental hardware and software to transmit and receive AX.25 packets. It is essentially a PIC-E clone designed around a Atmel AT90S2313 with a few extra bells and whistles. I had picked up a couple of MXCOM MX-614s at the TAPR display (I also joined TAPR) at the Dayton Hamvention, and I needed a project to try them out on. I had designed many projects around Microchips PIC....

Connect a modem to a Basic Stamp

The 2400-bps modem in Figure 1 makes it easy to connect a Basic Stamp (Parallax Inc, www.parallaxinc.com) to a telephone modem. Using this circuit, you can call home via your PC and find out if the house is still there. The Basic Stamp2, BS2-IC, has the necessary programming space, and a 64-kbyte StampMEM memory-storage board enhances site data collection...

Interface for V.34 Modems with DS8933 and DS8934

This application note describes the V.34 Modem Interface and the benefits obtained when the DS8933 and DS8934 Line Drivers and Receivers are employed. The following sections are covered. # V.34 Standard # DS8934 and DS8933 # Async Application # Sync Application # Driver Characteristics # Receiver Characteristics # RS-232 and RS-423 # Summary # References..

RS232 cable modem

First of all you have to build one cable adapter to connect the female 9pins connector of the modem, with female 9pins connector of the base of E-10G HPC. To build the null modem cable you will need: 2 male connectors with 9 pins. 15cm cable with 7 wires. The schematic at the left , its show how to connect the wires. When you finish it, you can connect the modem with E-10G. I have test it with:....

LT1886: Low Distortion Line Driver

The LT1886 is a high speed dual power amplifier with excellent high frequency distortion performance. The LT1886 features a 700MHz gain-bandwidth product, 200V/ms slew rate and over 200mA of output current drive in a small SO-8 package. Using only a single 12V supply, the LT1886 is the best choice for the line driver in ADSL CPE modems (customer premises equipment)...

Single-Chip Modem

A simple modem provides an inexpensive way to link your IBM PC or compatible computer with a remote system. The modem, which transmits data asynchronously at 300 baud, is easy to build and features both autodial and autoanswer...

Pilot-Modem dialog

1. Because there is no DTR wire (modem pin 20) from Pilot. Pilot can simulate DTR line but this is not used at this moment (needs a pull-up) 2. This way we can not dial without a known dial tone if needed (like in some areas out of USA) 3. There no reason for this setting. Using X4 modem will dial as soon as it detects a known dial tone. Modem will not dial without a known dial tone (no....

Accounts area

Neighbour Categories

Circuit Diagram of Gsm Modem | Circuit Diagram

A GSM modem is used to Block Diagram: Circuit 7843.3089 GSM modem with a baud rate 57600.GSM is a Global system for mobile communication in this project. Schematic GSM modem interfacing with microc...

Small Plug-In Embedded Cellular Modem | Circuit Cellar

The Skywire is a small plug-in embedded cellular modem. It uses a standard XBEE form factor and 1xRTT CDMA operating mode to help developers minimize hardware and network costs. Its U.FL port ensur...

What You Can Do With A Good Modem - integrated circuit electronics

The LG G2 can run your media center. I was chatting recently with marketing people from Qualcomm Qualcomm (which is an Endpoint client) about modem goodness. I was trying to get them to convince me...

Electronics Circuit Application: Huawei E1750 HSDPA usb modem ...

Most mobile chargers don't have current/voltage regulation or short-circuit protection. These chargers give raw 6-12V DC for charging th... 0-30V 2A Adjustable Laboratory DC Power Supply circuits. ...

Electronics Circuit Application: huawei hsdpa usb modem service

i need 16-qam modem circuit | Electro Tech Online

hellow: it is required from me to design 16-qam modem ,so please help me to find the circuit of modem. thanks.

Tutorials

Operational Amplifiers

Computer Systems

Oscilloscopes

Transmitters & Receivers

Sensors & Detectors

ANSI Standards

Low Frequency Amplifiers

Power Amplifiers

Number Systems

Regulated Power Supplies

Analogue Filters

Digital Gates