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Arduino RFID Access Control with EM-18
The use of Radio Frequency IDentification (RFID) technologies is growing. Many different applications are implemented in various sectors, and used for very different purposes. RFID enables wireless data collection by readers from electronic tags attached to or embedded in objects, for identification and other purposes. This article describes the construction of a simple Arduino RFID...
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Arduino with Keypad Tutorial
T.K. Hareendran - 11/25/15
A keypad is one of the most commonly used input devices in microprocessor applications. In a...
Date: 2017-03-04 02:42:44
Related topics : rfid reader access control system / rfid security system using arduino / rfid projects using arduino / arduino rfid shield / rfid circuit project
PLL FM Transmitter Circuit - ElectroSchematics.com
The PLL transmitter exciter has the functions of providing a stable, low noise, frequency-selectable RF signal and amplify it to a controllable output power sufficient to drive the power amplifier. It uses a PLL frequency synthesizer built with MC145151, which covers the FM band in 100kHz steps. The VCO covers only a few MHz without readjustment.
The pll transmitter output power is controllable...
Related topics : rf power amplifier chip
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