We’ve seen no shortage of projects that use the ESP8266 or ESP32 to add “smart” features to existing home appliances, often by pairing the microcontroller with a radio or IR transmitter.
Smith] from the University of Washington, which purports to construct a low-throughput RF transmitter from little more than a resistor. This witchcraft is made possible thanks to Johnson noise ...
An RFID transmitter has two basic tasks. In the downlink phase, it must provide power to start up passive tags, and modulate its signal so as to send the tags commands and data. In the uplink phase, ...
Description: airborne, naval, and renewable energy applications, the OPTO-FIRE™ “optic core” offers a replacement for traditional copper cabling while delivering improved data transfer performance.
A transmitter/receiver that reads the contents of RFID tags in the vicinity. Also called an "RFID interrogator." The maximum distance between the reader's antenna and the tag vary, depending on ...
Passport holders come in varying sizes and with security features such as RFID-blocking technology or zippers. No matter what type of passport carrier you seek, an array of options await you in ...