RE: LD10 schematic

[Keith Doxey <keith.doxey@xxxxxxx>]

Robert,

I assume from what you are describing, that the LD10 is located some
distance away from the wiring closet. Adding a remote LED is not easy or
recommended. To add an LED would either mean connecting it to the low
voltage electronics within the module or connecting it to the output of the
module with a suitable dropper resistor.

The low voltage part of X10 modules is fed from a capacitive dropper power
supply and would almost certainly not support the additional load for the
LED. Also, despite the fact that the low voltage section operates on around
15 volts DC this is DIRECTLY CONNECTED TO THE MAINS AND MUST BE CONSIDERED
AS A LIVE 240V CIRCUIT.

Adding an LED to the output is simpler but again IT IS A LIVE MAINS
CIRCUIT....NOT LOW VOLTAGE. Also the dropper resistor would dissipate a lot
of heat.

Instead of a small wattage bulb, why not use a neon indicator. Cheap,
virtually no power consumption but still requires mains rated cable for the
connection as it is also a live circuit. Using a neon also has one other
benefit. It will show the current status of the module but also if the lamp
controlled by the LD10 blows the neon will light at all times due the
leakage through the suppression components. Once the blown lamp is replaced
the neon will be revert to showing the true state of the LD10.

If you do decide to add some form of remote monitoring, please be careful.

Keith

> -----Original Message-----
> From: Robert Crawshaw [mailto:robert@xxxxxxx]
> Sent: 16 August 2000 00:19
> To: UK HA mailing list
> Subject: [ukha_d] LD10 schematic
>
>
>     Lo
>
> Anyone know ehere i can get hold of a schematic of the LD10
> dimmer module ?
> Im SURE i HAD one on my HD somwhere but i cant find it now
>
>
> I am wanting to add an LED to the module so i can see when it
> is powered up
> from the wiring closet.
> I was toying with the idea of putting a small wattage bulb in
> parallel with
> the lights they control but there HAS to be a nicer way of doing it :)
>
> Cheers
>
> Robert Crawshaw                 http://www.golcar.demon.co.uk
> Member of HAUG (Huddersfield Amiga User Group)
>
> The release of Windows 2000 has been put back to the first
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