FreeTrack Forum
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Hi,
First of all, I love this initiative and I can't wait to have created my own. But because I know little about electronics I need someone to help fill my shopping cart. (I want to build the cap) I found these LEDs. According to the handbook, these are the ones I need. But howmany batteries do I need? And do I need some kind of resistor of some kind? I am planning on using normaal AA batteries. 1 or 2 would be ok right? Could anyone please help me fill my cart at this website so I can get started?  Maybe linking the parts I need like I did above? (a resistor is call weerstand in Dutch, but I hope the English site is back online asap) I would be very thankful! And I hope I can help ppl out later as well as you guys do now! Jeroen the Netherlands |
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The Links are not working
But I think you mean this page IR-LED SFH485P (T 1 3/4) --> 5mm, 1,5V, 100ma, +-40'' Correct me if I am wrong! About the resistor I am not sure. I use 2 AA and no resistor. Not very power saving but works And no my head is not burning  |
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Hey !
If you are using 3 SFH485P, fill the Assembly Wizard with the following datas : * Power Supply Voltage (V) : 3 * LED Forward Voltage (V) : 1.5 * LED Forward Current (mA) : 70 Then, you will be said which resistor(s) to buy .Rémy  |
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One more quick question... Just a yes or no will do
Is this the resistor I need? I cant see the colorcode properly so I want to be sure. The LED Assembly wizzard says I need a 22 ohms 5% resistor. Current 68.2 mA Dissipated power 0.1 Watt Total Current in Assembly 204.6mA. |
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I guess it's okay. I can't see the colors either, but according to the written caracteristics (although I can't read Dutch
 ), it seems to be the right one ! Rémy |
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