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how to increase the range of IR transmitter

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Skyraper

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these are the specs of IR i am using, i have to increase its range upto 10m..so what should i do ,is there any circuit in which i connect it , i have already inserted a resistence of 46 ohm in order to operate it .
 

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Genovator

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The IR diode will provide output power of maximum as given in spec. What people do to increase range is that they add 4-5 diodes in parallel for higher output power. This increases range.
 

Usama Siddiqui

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i have used a parallel combination and it worked really fine! the prob is that whether u increase its input power or u decrease the resistance of its path both would increase the current through the IR diode and it would damage the IR more quicker than u could expect!
 

chuckey

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Use a pulse system to switch your current on and off. The receiver then can be tuned to this switching frequency, which allows more stable higher gain. use a focussing reflector, get a better photo diode detector. . .
Frank
 

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The IR diode will provide output power of maximum as given in spec. What people do to increase range is that they add 4-5 diodes in parallel for higher output power. This increases range.

but i also want that these IR diodes must have a pointing beam , if i use 4-5 diodes n parallel will there beam be a pointing beam like red laser because the IR i have am using now have a pointing beam like red laser..so what will i do further in order to collimate that transmitted IR beams for 4-5 diodes.

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The IR diode will provide output power of maximum as given in spec. What people do to increase range is that they add 4-5 diodes in parallel for higher output power. This increases range.

but i also want that these IR diodes must have a pointing beam , if i use 4-5 diodes n parallel will there beam be a pointing beam like red laser because the IR i have am using now have a pointing beam like red laser..so what will i do further in order to collimate that transmitted IR beams for 4-5 diodes.
 

Audioguru

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The problem with the spec's for your IR LED is that its maximum allowed current rating is continuous (for a night camera?). The spec's for maximum PULSED current and its duration are not shown.

IR LEDs used in remote controls are spec'd and used with small-duration pulses that are 1000mA or more.
 

Genovator

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If its a pointing beam like then the beam's diameter will increase by adding 4-5 diodes. The diode's power dissipation is less for what you want to do. 4-5 parallel diodes will increase the IR density, mostly in the center of the beam...
Try to keep the diodes as closer as possible with each other, in a circular formation, and all facing in same angle.
 

Usama Siddiqui

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try keeping it close enough,and even if that doesnt satisfies your issue,simply use any convex lens ,its simple and efficient.
 

dick_freebird

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Are you sure that this is a transmitter output problem,
and not a receiver sensitivity problem? Trying to fix a
square-law attenuation by adding linearly to the output
power, only goes so far (heh).
 

godfreyl

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The specs say output power is 50mW. That sounds like more than enough for a 10m range, assuming some kind of half-decent receiver at the other end.
 

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