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A Low cost A/D with a Potential of 5KV Isolation from Computing elements by use of Normal/Special Opto-Couplers. This can give better resolution and accuracy than a 8 bit A/D. may be close to 10 bit A/D. Added advantage is that you can optically isolate the inputs.

Convert Analog to Digital with a V-F

Suppose your temperature sensor touches a heating element OR your speed sensor is subjected to a shock from a defective motor with earth line broken. Such situations happen in the field, even at home or lab. Sometimes it is carelessness, other times it is wear-tear. Many times it is breakdowns, accidents etc. So do not let the High voltage to get at your Microcontroller Board.

More about Embedded Micro here – Hyper Embedded

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We all have phones and we can create apps too. This makes a Arduino a bit isolated without connectivity.

Using some of these Shields you can gift Smartphone Power to your Arduino. Create a Home Automation System with a Smartphone App control. An interactive Robot with SMS. Create a Process Automation System with SMS Alerts too.

3G + GPS shield for Arduino

3G GPS shield for Arduino

Connect to high speed WCDMA and HSPA cellular networks. Make web interactive project like the “Internet of Things”. The module counts also with an internal GPS what enables the location of the device outdoors and indoors.

  • HTTP and HTTPS (secure mode) navigation, download, upload to web server.
  • FTP and FTPS (secure mode) protocols are also available.
  • Send and receive mails from Arduino using the SMTP and POP3 clients.

Arduino GSM Shield

Arduino GSM Shield

The Arduino GSM Shield connects your Arduino to the internet using the GPRS wireless network. Just plug this module onto your Arduino board, plug in a SIM card from an operator offering GPRS coverage and follow a few simple instructions to start controlling your world through the internet. You can also make/receive voice calls (you will need an external speaker and microphone circuit) and send/receive SMS messages.

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How would you let your PIC-Micro Board Interface with your Cell Phone (Network). These Cards and Designs will help your Embedded System to be Controlled or Monitored using a simple Wireless Device Networking.

PIC-GSM at Olimex 

Using PIC-GSM you can easily monitor and control your home from everywhere with your GSM cell phone. You can switch on and off relays remotely by SMS. You can monitor the status of your GPIOs or toggle them. You can establish a call to the GSM module and speak or listen on the audio channel of the board. You can monitor the temperature from several digital remote temperature sensors.

PIC-GSM at Olimex

SMS Transceiver for PIC (SMST4PIC)

SMS Transceiver for PIC (SMST4PIC) is a tool for sending SMS via a RS232 serial connection between a PIC and a mobile phone. It establish on the basis of a serial line connection a AT command based communication for sending SMS and SMS-based e-Mails.

GSM Monitoring and Control System

A simple GSM based monitoring and controlling system on a small board with a PIC processor holding a solid program able to control a various types of GSM modems and Cell phones.  Four inputs, one power output prepared for monitoring and controlling through SMS messages on your mobile phone.

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Build it or go for a kit, this is a nice design for a Table or Desktop lamp. You will need to fix in a Enclosure with a Diffused Plastic or Glass Filter Front.

18 LED dimmable LED lamp

18 LED dimmable LED lamp

This circuit is a dimmable white LED lamp array with 18 LEDs. The lamp brightness is regulated as long as the input voltage is above 10.5V. A low-dropout analog voltage regulator is used for a simple and relatively efficient design. The lamp produces enough light to use as a a reading lamp or a small work lamp. – G. Forrest Cook

The 12V DC input voltage is routed through the 1A fuse and the on/off switch. The 1N4001 diode acts as a crowbar device. If reverse polarity is applied, the fuse will blow and the rest of the circuitry will be protected. Power is sent to the LM2941CT voltage regulator IC.

Power this project from sunlight with a CirKits solar power circuit board kit.

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This was a National Semiconductor Application Note, now TI. – Low Cost IC Stereo Receiver.

AN-147 Low Cost IC Stereo Receiver

Some Highlights

The LM3089 FM IF System does all the major functions necessary for FM processing, including a three stage amplifier/limiter and balanced product detector, as well as an audio preamplifier.

FM stereo demodulation is accomplished by the use of the LM1800 phase locked loop, thereby eliminating the need for external coils.

The AM function of the receiver is done completely with the LM3820 AM radio system. While designed for 3 section tuned superheterodyne application.

The LM382 dual preamplifier was selected for its minimum parts count and low noise capability.

Panel meters are employed in the FM system for both signal strength and center tuning, allowing for easy and accurate tuning. A directly driven LED offers immediate indication of FM stereo reception.

Low Cost AM FM Stereo Receiver

A single transistor tone control circuit was designed as the optimum cost/performance trade-off. The transistor is configured in a shunt-shunt feedback design, allowing gain variations between input functions.

The stereo power section, consisting of the LM378 dual audio amplifier, delivers 3W/channel with total harmonic distortion (THD) less than 1% and 4W/channel with THD less than 10%,

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“Audio Amplifiers, Voice Recorders Clocks, Counters & Timers, Data Acquisition & Control Educational Kits, Test & Measurement ”

Ozitronics – Electronic Kits

K1001 – 8 Channel Serial Servo Controller, Assembled & Tested

ozitronics servo kit

K1001 is an 8-Channel Serial Servo Controller based on the Atmel 89C2051 microcontroller. It accepts RS232 or TTL serial data from a computer or microcontroller and outputs PWM (pulse width modulated) signals to control up to eight RC servo motors (as used in radio-controlled model airplanes, cars, etc.). Unused servo pins can be reconfigured for digital output to drive on/off devices.

Up to four controllers can be multi-dropped on a single serial port for controlling up to 32 servo motors – more on request.

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Some things you can find there -CB & Ham radios, Walkie-talkie (GMRS/FRS) radios and Shortwave & multiband radios.

RadioShack- Audio Video Electronics

The company was started as Radio Shack in 1921 in Boston, Massachusetts, by two brothers, Theodore and Milton Deutschmann, who wanted to provide equipment for the cutting-edge field of amateur, or ham radio.

RadioShack- Audio Video Electronics

Theodore and Milton Deutschmann opened a one-store retail and mail-order operation in the heart of downtown Boston. They chose the name, “Radio Shack,” which was a term for the small, wooden structure that housed a ship’s radio equipment. The Deutschmanns thought the name was appropriate for a store that would supply the needs of radio officers aboard ships, as well as “ham” radio operators.

The first 40 years – RadioShack Corporation – Wikipedia

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Amplimo has got a very large range of toroidal transformers available directly from stock. Standard range transformers have been approved by KEMA and UL . Built and tested according to the international standard EN61558 .

Amplimo – Toroidal Transformers

Sstandard range have a 230V primary and two equal secondary windings. These windings can be used individually or can be used in series or in parallel.

Amplimo - Toroidal Transformers

Standard range transformers are also available with 2x 115V primary to be used in series or in parallel.

Toroidal-Transformer.com – Here you can order Toroidal Transformers.

Amplimo presents a generation of amplifier modules offering outstanding advantages, allowing the rapid construction of quality audio amplifiers for many applications. These hybrid modules contain the complete audio amplifier circuit for connection between the preamplifier or mixer and loudspeaker, they are very stable even with complex loads and are therefore very reliable as the likelyhood of oscillation has been reduced to a minimum.

Amplimo BV
Industrieweg 14, NL7161BX, NEEDE, The Netherlands.

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