Wise Guy

Wise Guy
Wise Guy

Stories by Wise Guy

How ZigBee Compares

Typical customers have chosen ZigBee for its low power requirements, network scalability, and reliability.

Build a DSSS Radio-Part 2

Last month you got me started on building a direct sequence spread spectrum (DSSS) transceiver. You covered the transmitter discussion and promised to come back to explain the receiver and error-correction code.

Understanding Radios

I've been thinking about making my own radio. I understand fixed-frequency radios are the simplest and easiest, but a colleague is recommending a spread-spectrum radio instead.

134 kHz ISM, Safety Again

From what I've read, wireless sensors and other wireless devices work at ISM frequency bands of 900 MHz and 2.4 GHz. But I've read, too, about "ISM-compliant" RFID tags and readers that work at 134 kHz."