Led Driver with enable or on-off controlled?

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mir_as82

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i want to make a application with 1w power led, led driver and reed relay.
i will use reed relay for this application. My aim is, when any magnet is closed to reed relay thus led driver will stop pumping current to led, when magnet is taken away from the reed relay so led driver will continue pumping current to led. how can i achieve this? if i use like this driver which is attached to this message. where i connect to reed relay pins on this driver? I mean how can i change this driver as ON/OFF controlled via reed relay? Or are there any like this 1W led driver? (Not so expensive)
 

Probably be easier to use a SPDT reed relay.
Hard to tell from the photo what the connections would be.
 

Do you have any circuit diagram for my solution or can you suggest me any simple cheap led driver?
 

what's the supply voltage?
what is the Vd or Vf and Imax for the LED?
 

plenty of LED drivers are available in market and easely u can fine LED driver circuits in net.
for ex:
1W LED driver circuits
constant current 1W LED driver circuits

u wanted to drive from low voltage DC (ex: 3v, 5v, 12v, 24v) or from direct AC voltage (ex: 110v, 230v)

we can suggest u better if u give these details.
 

My supply voltage must be 220V ac. My led is 1watt 350 ma power led. My driver current must be between 300-350 ma. My driver voltage must be 3.2V.
But important point is that I must control this driver via reed relay as on/off. When reed relay is open so driver must pump current to my led, if reed switch is closed(any magnet is closed to reed switch) so driver must stop pumping current to led.
 

whether ur reed relay has NC contact? if it has NC u can use it easely.
Design a simple 220V 1W led driver connect it to powersupply series with reed relay's NC and common contact.

simple circuits:
http://vineetron.blogspot.in/2012/10/230v-to-1-watt-led-driver.html
**broken link removed**
http://gladis2011.hubpages.com/hub/Making-a-1-Watt-LED-Driver-Circuit-at-220V
http://www.circuitstoday.com/led-lamp-from-scrap


or u can try the following controlled drivers

find the attachment HV_LED_Drive_Note[1].pdf
**broken link removed**
 

Attachments

  • HV_LED_Drive_Note[1].pdf
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Is there any reed relay which normal situation is NC? If I drive reed relay under the 350 ma so it can be problem? Do I need to connect any capacitance between contact and Com pin? I mean for reducing arc or noise.
 

mir_as82 said:
Is there any reed relay which normal situation is NC?.
Click to expand...

Those are not so common, a SPDT might be easier to find.

- - - Updated - - -

mir_as82 said:
My supply voltage must be 220V ac. My led is 1watt 350 ma power led. My driver current must be between 300-350 ma. My driver voltage must be 3.2V.
Click to expand...

Maybe the Vf or Vd of the LED is 3.2V, which means the driver voltage must be greater than 3.2V, i.e. 5V, 9V, 12V....................

.
Where will you source the parts? locally? from your country? or internationally?
 

My driver is ordinary 1w, 350ma constant current power led driver. I buy drivers in my country.
My another question is, should I connect to capacitance out of the driver? For reed switch contact noise
 

normally reed relay contact current rating will be less only. which one u have? what's its contact current rating? if u run with more current than it rated current it can work for fewer cycle only. That too u cannot use it at 220V AC side. I'm not sure about that. Because usually reed relays are designed to switch the signals at very low voltage and current. because reed relay contact gap will be very less. check the specification of the reed relay which u have.
 

jpsganesh said:
usually reed relays are designed to switch the signals at very low voltage and current. because reed relay contact gap will be very less. check the specification of the reed relay which u have.
Click to expand...

very true. the reed relay would 'have to' go between the driver and LED
 

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