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.

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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