Welcome,

Here at Altelectronics we supply surplus electronic components and components that are hard to find, helping you build something new or fix something old and we are giving you ideeas for new exciting projects.

We are passionate about electronics and we will be able to offer you advice and point you in the right direction when you are looking for help.

Our philosophy is that everything is fixable, can be transformed into something or reused for something new. We always find an alternative for every project big or small, from ligting up your first LED's to measuring your power consumption through out your house.

Thank you for visiting and follow our blog for projects.

 

Available now, the Arduino IDE Compatible Smart Temperature and Humidity sensor

 

 

Wireless Temperature & Humidity Sensor  29.00 EUR	Temperature & Humidity Sensor with enclosure   35.00 EUR

 

    In STOCK !

Arduino UNO Header Kit &  Arduino UNO R3 Header Kit

Arduino UNO R3 Header Kit  1.25 EUR	Arduino UNO Header Kit  1.25 EUR

 

DDS - Direct Digital Syntesizer

The AD9851 is a highly integrated device that uses advanced DDS technology, coupled with an internal high-speed, high performance D/A converter, and comparator, to form a digitally-programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, the AD9851 generates a stable frequency and phase-programmable digitized analog output sinewave. This sinewave can be used directly as a frequency source, or internally converted to a square wave for agile-clock generator applications.

• 180 MHz Clock Rate with Selectable 6x Reference Clock Multiplier
• On-Chip High Performance 10-Bit DAC and High Speed Comparator with Hysteresis
• SFDR >43 dB @ 70 MHz AOUT
• 32-Bit Frequency Tuning Word
• Simplified Control Interface: Parallel or Serial Asynchronous Loading Format
• 5-Bit Phase Modulation and Offset Capability

• Comparator Jitter <80 ps p-p @ 20 MHz

 

The module can be driven from Arduino UNO with a simple program over the SPI bus, and can become a useful programable signal generator in your electronic lab

Datasheet for the AD8951 can be found here

 

 

XILINX CPLD starter board

This board is ideal for the people starting to learn about programmable devices, or for protoyping simple logic circuits, It's a cheap robust and simple solution, the sofware tools can be download for free from www.xilinx.com, the only necessary accesories are a JTAG cable, and a 5V power supply

 

 

All IO pins are brought to connectors to be easy to access with fly leads, and are clearly marked on the PCB. The board has a 25Mhz oscillator fitted, and 4 Leds connected to IOs for easy debugging. We are in the process of writing tutorials on how to start programming with this board, and we'll provide a few designs examples to be used as starting point. 

Download the schematics for this board in PDF format

The datasheet for the part on the board can be found here

 

 

 

Arduino Steper Motor Driver - Back in stock !

This shield is based on L6470 dSpin Motion Controller can drive two 1.5A steppers independant of each other. By stacking 2 shields together it can drive 4 motors. This sheld requres an external power supply of 12V DC or 24V DC (depending on the motors)

Main applications are robotics, small CNCs, 3D printers and many others. This shield is compatible with Arduino UNO, and is using the SPI interface for comunication. Two more IO s are used to signal the Error Flag and Busy Flag to the CPU.  When stacking two shields together the humpers on the shield have to be set to accomodate this scenario.  The shieds is not taking any power from the Arduino UNO board by having his own 5V regulator fitted on the PCB. A functional arduino (V1.0) example project is available for download which demonstrates most of the features of the driver. Stepper motors will be on sale for this shield soon.

 

 

 

 

Arduino RF 433.92 MHz Shield

The RF Transceiver Shield is an Arduino-compatible expansion board (“shield”) that gives your Arduino the ability to both receive and transmitt radio signals transmitted on the unlicensed bands of 315, 433, 868 and 915 MHz bands using FSK (Frequency Shift Keying), ASK (Amplitude Shift Keying) or OOK (On-Off Keying) modulation.

ASK signals at 433MHz are very commonly used by consumer electronics devices including weather stations, power consumption meters, security systems, and home automation controllers.The RF transceiver used is RF12 from Hope Electronics, this means that the shield is using SPI.
The advantages of SPI are that it runs at a higher data rate, and it has separate input and output connections, so it can send and receive at the same time. It uses one additional line per device to select the active device, so more connections are required if you have many devices to connect. Most Arduino projects use SPI devices for high data rate applications such as Ethernet and memory cards, with just a single device attached.
Arduino releases (from release 0019) include a library that allows communication with SPI devices. SPI has separate input (labeled “MOSI”) and output (labeled “MISO”) lines.

Schematics available

Product Code ARD-RF433-SHL

 

 

 

 

 

 

Wireless Temperature and Humidity sensor

Compatible with Arduino IDE, and our  Arduino RF 433.92 MHz Shield based on SHT11 sensor from Sensirion. 

This sensor comes with Aduino 1.0 demo sketch, and is pre-programmed to send temperature and humidity measurements every 4 seconds. The sensor can be purchased with ABS eclosure, or just the PCB (fully tested) and will be delivered in two versions, with integrated pcb antenna, or external antenna for extended range. The sensor can be programmed via programing cable (ISP connector) and is using two AA bateries for power.

 

*Sensor in the picture is with integrated pcb antenna.

 

 

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