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pier
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Posts posted by pier
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Hi Zeppelin
Thanks a lot. I never took the resistance into calculation. I just divided the voltages and went on till the last 2k resistor. The correct value is 9 volts. -
Hello AG
What was the part number you gave ? -
People can try to make out the model number of ur stereo if u can post the picture of it .
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will i be able to get LED's which are similar to each other, i mean from big branded manufacturers ? something like led's from a batch ?
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hi Zeppelin
According to the voltage divider concept ( i used the software "resistor calculator" on the site ) and found it to be 16volts at the last 2k resistor. Am i right ? i'm not so sure!! -
Do you have the part number to order for the led's made by fairchild . What price you bought it for ?
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Hello
I've been reading the book of malvino ( electronic principles ) 3rd edition . I have a doubt and its eating up my head . Please help me to go further .
Here is what it says
THEVENIN -
No AG, its a chineese make.
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Hi AG
In my previous LED project 2 LED's blew off from in between the string , I think that the quality of the LED is poor . What do u think ? . I just replaced them . -
A reasonably high voltage is also fine.
How much could this voltage be ? -
Hi AG
Should I use any protection for the transformer from AC mains voltage fluctuations or will that effect the circuit ? -
Hello AG,
Thanks for advice . I'll screw it up with some space in between (using lingthier screws). What wire shall i use for the led(+&-) I have used one now with 7 strands and 0.2mmthickness for each strand (here we call it 7.2 wire) . -
Hi
Its working at my friends place . -
I spelled it wrong . It was hylam instead of hylem . Here is a pic of switches and a socket fixed on a hylam board .
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Hi AG
It is used to fix switches and sockets on them. Brown colour on the back and white in the front made by Anchor . I will try to send a pic . -
hello AG,
I bought a new one (luxion 1 star) The Voltage across the led is exactly 3 volts with the regulator circuit . I have mounted it on to a heat sink(aluminium) of size 57mmx57mm square with 3mm thickness( i cut it myself ) and that is now having heat sinking . I want to screw the heatsink on a hylem sheet of thickness 3mm and length 100x100mm to screw it up again on the roof. Will the hylem sheet get damaged because of heat ? the tempetature on the heatsink just below and opposite to the led is 50 degree centigrade . -
I'm sure there is no spare slot ( its an old system ) .
I never thought of this idea . I will let u know tomorrow .Can you try connecting YOUR printer to a friends PC for a test and vice versa? -
Hello ESP
Actually I have connected the printer to it . My printer prints its test page but nothing from the comp . The computer also displays its printing, But the printer prints nothing. I have bought a new one but still have the old mother board. My local hardware fellow told me to change the mother board or get it fixed which would cost me almost 75% of the new one and so i went for a new one . If suggessions are given from the community i would like to work on that personally . My bios settings are right . -
Hello AG
What is lumens and CCT with respect to LED ? -
Hi AG
I have seen in the projects Q/A form, your topic on the mood lamp where in the last a heat sink has been suggested for the LED. Should we use a heat transfer paste (white colour) in b/w the LED and the heatsink ? -
Hi AG
Actually I made the circuit on bread board and by mistake i connected the capacitor(1000/25)in reverse but nothing happened to it . Was it supposed to blast ? But it was almost hot by the time i came to know my mistake and switched it off . -
Hi AG
So i can use 1000uF capacitor only !!!? -
Hi AG
What will be the input capacitor value after the bridge rectifier ?. For one LED the value i put was 1000uF when the transformer o/p voltage was 9 volts . -
Hi shaim
I feel u need to post your queries on the "SERVICE MANUELS" forum .
white led
in Electronic Projects Design/Ideas
Posted
In one of their page (pdf) i found white with the part number : 'MV8W0O'
http://www.fairchildsemi.com/collateral/psg04_opto.pdf#page=28