# Help with a LED circuit

Hi,
Just hoping you can help with designing a circuit diagram and some specs. I am doing a craft project that requires some LED's to illuminate certain areas.

The project will have about 150 LED's, connected in groups of 2,3 and 4. Each group will have it's own switch so different sections can be illuminated.

The LED's have the following specs
DC forward voltage : VF (IF =20mA)
3.2V-3.4V Typ, 3.8VMax
DC reverse current : IR (VR =5V)
100uA
Intensity luminous : Iv (IF =20mA)
BC08 : 350-500mcd
Wavelength : Wp (IF =20mA)
NA

What I was hoping for is if you could possibly provide instructions on how to connect the LED together, with any other components that may be required, and also how to connect them to the power supply, and what voltage and amperage the power supply should have

Hoping you can help

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Hope u get some idea and help from link below: http://www.acopian.com/power-supply-voltages/5-volt-power-supplies.htm
thanks and rate the solution.

Posted on Feb 25, 2009

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Hi!

I would suggest you to connect them in parallel. Use a 555 timer with them for switching them on/off and also use a power supply of +5v with it.

Posted on Feb 25, 2009

• Rylee Smith Feb 25, 2009

Power supply

Thanks

Rylee

• Rylee Smith Feb 25, 2009

Also, you will need to use resistors of around 330 ohms or 1000 ohms, 150k and 100k resistors and some npn and pnp transistors(2N3053,2N2905,etc). Also, copper clad boards or bread boards.

Please describe in detail what type of circuit you want to design? What type of project you want to make.

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Hi,
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Goodluck!

Posted on Jan 02, 2017

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