infared dectator

[noah_fakelastnamelike_bob]

hello so a beginner would like some help with his really basic design that could be entirely wrong. i want to make a infrared detector then transmit that but would like to stick to the basics. i would like to use a 2n-3904 or 2n-3906 with a detector, transmitter and a couple resistors. i have don't really know what values i should use for the resistors or if i need to find a certain wavelength for my transmitter. i feel like this would be to simple but here it goes. please excuses my bad drawing.

[electronics man]

You may not want that resistor before the transistor only the one after between the transistor and before the LED

[deth502]

when you say "then transmit" your talking about making a repeater? if so, just about any ir led should work. for most general applications, i dont think you will see a difference between an 850 or 940.

the series resistor would be calculated using the led's parameters and your supply voltage, same as any other led.

if i misunderstood, and you are just looking to detect, as the title says, any camera can do that much simpler.

[HackedFridgeMagnet]

please excuses my bad drawing.

No can do.

Detacted a spelling mistake too.

[noah_fakelastnamelike_bob]

i just want to be able to get the signal re-amp it then send it back through i have been told it should work and will post when done

[noah_fakelastnamelike_bob]

actually could some one direct me to a link from DIGI-KEY for an infrared detector and emitter i don't want to do or mess with specifics there because ill buy some thing wrong. thanks for any help i get