The ELCN (Embedded Luminaire/Lighting Control Network) is the physical layer for transmitting light level data to embedded dimmers.
The transmitter injects a 1MHz carrier into the AC line at each zero crossing when its transmitting. It is connected to the line by a high pass filter.
The receiver has a high pass filter to remove the 60 Hz signal and a diode-capacitor detector to demodulate the data.
The ELCN module will fit between the light bulb and the bottom of the socket.
- 1 MHz square wave, 8 Vpp input to AC line though 2.2nF coupling cap with 10 K to ground
- Transmitted from Diddy's room to Emily's room. 250 mV signal, 250 mV noise
Second test circuit: File:ELCN.pdf
- improve output stage
- add modulator
- improve filter
- bias for single supply operation
- add gain stage, perhaps AGC
- design and test demodulator
- add surge protector
- design power supply
East Campus Old Wiring
- B407 south old circuit
- B406 north old cirucit
- W401 south old circuit
- lounge quad outlet by cocoa pot
- lounge lighting
- louge outlet by rack