Using the Circuit Specialists EZ915 and EZ2400 Transceiver Modules

The EZ915 and EZ2400 (Transceiver Modules) available from Circuit Specialists are easy to use RF Transceivers that can be used to send any type of data wirelessly. The units are completely self-contained transceivers that even have built in antennas. Simply provide data in to the unit set for Transmit and the unit set for Receive will output an exact replica of the data.

A simple wireless data monitoring system is shown on the attached schematic. The system monitors a temperature value and transmits to a receiver that then displays the temperature value on an LCD module. The RF Transceiver modules only require one data connection and one control connection for operation, but indicator LED connections are provided if desired by the designer. The microcontrollers can be any type or even a Personal Computer with the appropriate interface circuitry. Similarly, the LCD module and the temperature sensing device may be replaced with any type of sensor and monitor that is desired. Therefore, this system is capable of monitoring any type of data desired (ie. temperature, voltage, current, etc.).

The +5 Volt power and ground connections to the PIC devices are not shown for simplicity but must be connected for operation. The parts list for the representative circuit is as follows:

QTY                                Description                               Part Number

2                                         RF Module                                  EZ915 or EZ2400

2                                         Microcontroller                         PIC12F675

2                                        Capacitor 0.1 uf                          21ET100

2                                       Resistor ¼ watt 10K                  RA10K

1                                      Temperature monitor                LM35

1                                      LCD Module (serial)




George Leger has a Masters in Electrical Engineering from Stanford University, worked in private industry pioneering surface-mount technology and in government research labs for twenty years, published several papers on surface-mount technology, co-authored papers published in national symposiums on accelerator technology, was past president of SMTA and an adjunct professor at the community college level, holds a patent, and is a certified microchip design partner, serving as a consultant to many companies developing electronic circuits.

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