1. Home
  2. Electronics Design
  3. X10 Modulation Theory
  4. Page 2

X10 Modulation Theory

Use a transformer secondary in series with a capacitor.

Reply to
Robert Baer
Loading thread data ...

What box?

;)

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 

hobbs at electrooptical dot net 
http://electrooptical.net
Reply to
Phil Hobbs

The "we've always done it this way" box... unless I'm really hungry I usually just decline to quote those jobs. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 

             I'm looking for work... see my website.
Reply to
Jim Thompson

I hope you make that available.

Reply to
Tom Del Rosso

I'm having some pretty wild, easy-to-implement ideas ;-)

I'll post once I build it... I'm into surgery next week to repair a colon-bladder fistula... how long I'm out of commission, I don't know. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 

             I'm looking for work... see my website.
Reply to
Jim Thompson

I hope that's not as bad as it sounds.

Reply to
Tom Del Rosso

Sort of. The doc suspects an infected diverticulum (*) burst and the infection spread to my bladder, forming a tube (fistula) connection from colon to bladder. I started out pissing blood, then it got more vile :-(

But they apparently are going to do the repair via a laparascope.

(*) I've had diverticulitis since my late 20's... courtesy of the stress of working for Motorola. Cured the ulcer part by laying myself off in 1970 ;-) ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 

             I'm looking for work... see my website.
Reply to
Jim Thompson

LC series tank across the line, with a switch across the capacitor ?

--
This email has not been checked by half-arsed antivirus software
Reply to
Jasen Betts

X10 modulates the line by a tuned RF Xfmr that is capacitively coupled across line and neutral. The modulation is a pulsed carrier of 120KHz, as I remember.

Please view in a fixed-width font such as Courier.

+------+ || | +---- ----+|----------Line Modulating | / | )|||( || -------+ Amp | )|||( Pulses | | )|||( ||/ | +---) (----+|----------Neutral +------+ ||

Dave M

Reply to
Dave M

That's not really RF, usually RF implies wireless. However, ATT might be testing real RF on power lines; basically, power line as giant antenna. That would solve the problem of going through transformers.

Reply to
edward.ming.lee

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.