Allitle help with 4led circuit please

[coldpizza721]

i am planning on making this circuit with a usb wire.

+----|>|----|>|----|>|----|>|---/\/\/----+ R = 8.2 ohms
Source=5v
led =29mA https://www.radioshack.com/product/...red&x=16&s=A-StorePrice-RSK&parentPage=search

on the back of my mouse it says 5v 100mA.
Does this mean if i want 4leds i need to have them 25mA or less?

also i messed up my mouse and i plan on using an old printer usb. Are all usb's 5v?

Finally there is a cylinder thing attached the the wire of my usb. I have no idea what is is and would like to know if when i cut it i should keep that part or cut below that.

thanks

 

[kchriste]

Does this mean if i want 4leds i need to have them 25mA or less?

Only if you put them in parallel. You've show them in series, so the max current drawn will be apx 25ma.

Led =29mA **broken link removed**

I hope you don't plan on seeing them glow as they are IR LEDs.

Are all usb's 5v?

Yes.

Finally there is a cylinder thing attached the the wire of my usb. I have no idea what is is

It is probably a ferrite core for RF suppression.