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 2 x Silver Waterproof Fake Dummy CCTV Surveillance Security Camera Flashing LED $17.95 End Date: Monday Jun-18-2012 21:06:08 PDT Buy It Now for only: $17.95 Buy It Now |
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 100cm Green 60 LED Flexible Neon Strip Light 3528 F $0.86 End Date: Sunday May-20-2012 18:03:27 PDT |
 Submersible 12 Volt LED Trailer Towing Light Kit For Boat RV Cars Brand NEW $29.95 End Date: Tuesday May-29-2012 18:37:02 PDT Buy It Now for only: $29.95 Buy It Now |
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 10xG4 25 LED Warm White RV Marine Boat 25 SMD Light Bulb Lamp $6.99 End Date: Sunday May-20-2012 18:40:35 PDT |
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electronic and led lights?
i want to connect 3 rechargeable 1.2 volt AAA batteries + - + - + - ,,and hook up 23 led lights blue--red and blue -green ,,??? what adaptor do i need , what resistor ,do i need ,what voltage led lights can i use ???
the batteries would be 900 MAH and can the adaptor be 240 to dc 6 volts but what AMP or MA ?
Hi there
3 rechargeable cells , each with 1.2V each will give 3.6 volts in total.
If you have 23 LEDS connected in series , each with its 0.7V drop you clearly will not have enough voltage from the supply to illuminate them.
This means that you will need to parallel wire up the LEDS.
This can be done two ways.
The first is with one resistor , and ALL the LEDS in parallel.
The resistor required would be 6.8 ohms.
This method is however not the best from an engineering point of view as the different LEDS will each use different amounts of current.
Some LEDs may fail early with this setup , or at least show different levels of brightness.
The better way to do it is to use a separate dropping resistor for each LED.
Each LED will get its supply through its own150 ohms resistor.
Each LED and resistor combination will be wired in parallel with each other.
555 Timer With LED
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