Re: [bascom] Powersupply from 230Vac

[Tobias Reneskog <reneskog@swipnet.se>]

Hi!

And if the light bulb gets broken, the 5V supply will also fail.
Also, the setup might not work if you change to a flourescent "energy saving" lamp. Especially if you use some kind of dimming function.

Regards
Tobias


Laszlo Juhasz wrote:

Pascal,

Probably I can help you since I have many years of experience with AC Power management and dimmer applications as well.
Here is the deal. If you are using the light switch circuitry the most important you have to keep in mind that your light bulb will never go 100% ON again. You always have to have some voltage stolen from it(>20V). Basically what you were asking is a very wide range switching PWS. Actually if you'll control that light bulb electronically and while the bulb is barely on then your PWS input is going to see about the full 230V. The higher the light bulb voltage goes the less the PWS has to work since the voltage goes to the light bulb and not to the PWS.
I have a simple OFF LINE wide range SMPS based on a single chip for (5-15V,300mA).
If that is what you want please let me know and I'll send the info to you. This will not isolate and you have to be careful there, but I'm sure you're aware of that tickling feeling provided by the hot side of the Mains.
Cheers,

Laszlo Juhasz 
Director of Research
PS Power&Audio International Inc.
4826 Sterling Dr.
Boulder, CO. 80301 
PH:720-406-8946 xt.114



It is better to use a transformer type or SMPS power supply,
which is electrically isolated from line and neutral of mains supply

Devidas


  

From: "Qboll" <msg_qboll@hotmail.com>
Reply-To: bascom@grote.net
To: <bascom@grote.net>
Subject: [bascom] Powersupply from 230Vac
Date: Sun, 15 Jan 2006 18:59:13 +0100

Hi All

I was wondering if someone can help me
With my problem.
I want to make a DC supply from 230Vac Phase(brown) and switching
wire(black).(these 2 wires are available in the wall switch)
Black wire goes to Lightbulb and from Lightbulb to neutral(blue)
Is this possible?

With this supply(5Vdc) I want to switch(triac) the lightbulb by using an
AVR. Also RF communication, temp readings, Huminity Readings etc.etc.

2 days of googling and I didn't find what I was looking for.
Can someone point me in the right direction?

Thanks,

Pascal



    

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