GUN4IR - The Ultimate 4 Points Lightgun System

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kill_one:
could someone post a tutorial with photos and links of the precise components to buy? In particular
4 powerful 940nm IR LEDs with angle wide enough (at least 30 °) and
resistors, are they the same as samco project? 4x 100 ohm Resistors ? 4x Super-bright 5mm IR LED - 940nm 20 or 30 degree beam width ?

thanks a lot guys :)

Mysli0210:
Finally recieved my 5mm 940nm leds :D
And can confirm that they do work fine from at least 1 meter.
However this was with the old 2 point sketch, so i have yet to test the 4 point version.

I found by experimenting, that 3 leds in series, with a switching step-down regulator set at 3.8V works fine, even though their max rated voltage is 1.4v per led.
I 3D printed a small part to house the leds (first with 4 leds spaced too far from each other) which i will share on my github, which will be updated today with the model (stl and fusion360) along with my pcb designs.
https://github.com/Mysli0210/Liightgun

@Jaybee sent you a PM :)

kill_one:

--- Quote from: Mysli0210 on January 12, 2020, 05:10:27 am ---Finally recieved my 5mm 940nm leds :D
And can confirm that they do work fine from at least 1 meter.

--- End quote ---

@Mysli0210 can you post a link for buy your led ?
thanks :)

JayBee:

--- Quote from: Mysli0210 on January 12, 2020, 05:10:27 am ---Finally recieved my 5mm 940nm leds :D
And can confirm that they do work fine from at least 1 meter.
However this was with the old 2 point sketch, so i have yet to test the 4 point version.

I found by experimenting, that 3 leds in series, with a switching step-down regulator set at 3.8V works fine, even though their max rated voltage is 1.4v per led.
I 3D printed a small part to house the leds (first with 4 leds spaced too far from each other) which i will share on my github, which will be updated today with the model (stl and fusion360) along with my pcb designs.
https://github.com/Mysli0210/Liightgun

@Jaybee sent you a PM :)

--- End quote ---

--- Quote from: kill_one on January 13, 2020, 07:06:20 am ---
--- Quote from: Mysli0210 on January 12, 2020, 05:10:27 am ---Finally recieved my 5mm 940nm leds :D
And can confirm that they do work fine from at least 1 meter.

--- End quote ---

@Mysli0210 can you post a link for buy your led ?
thanks :)

--- End quote ---

--- Quote from: kill_one on January 07, 2020, 07:10:51 am ---could someone post a tutorial with photos and links of the precise components to buy? In particular
4 powerful 940nm IR LEDs with angle wide enough (at least 30 °) and
resistors, are they the same as samco project? 4x 100 ohm Resistors ? 4x Super-bright 5mm IR LED - 940nm 20 or 30 degree beam width ?

thanks a lot guys :)

--- End quote ---
Actually it's on the work right now, I've finally found a pretty good solution that works well in any situation.
I will post it soon, but here what you will need for a good setup:
- 8* SID1K10CM led or similar specs (they have an angle of only 30° but are very powerful)
- 4* 56ohms 1/4watts resistor
- 4* very small soldering boards or something similar
- 1* USB plug
- enough wire to connect each IR point to the next one

Basically the idea is that instead of getting a wide range angle led but having a pretty bad useful distance, I combine two led for each point, very slightly angled vertically to greatly improve angle.
If the LEDs are close enough from each other, the cam will see only one point, even from close distance without filter.
So each point consists in two LEDs and one resistor in series, which are then connected directly to the 5V USB power.
The total consumption of the whole 4 point system is around 200mA, so any USB power should work.

Mysli0210:

--- Quote from: JayBee on January 13, 2020, 08:44:21 am ---All of the above

--- End quote ---
I got these, actually nothing special.
https://www.aliexpress.com/item/32755919314.html
EDIT: i dont recommend this seller, due to more than 2 months delivery time (did receive several packages ordered after leds, before they arrived)

The most important things I can think of are as follows:
Correct wave lenght, being 940nm. (think of how far your tv remote reaches! )
ViewAngle ofcourse.
Correct ir pass through filter (probably the one on the df-robot cam is, the filter on the wiimote does a huge difference, without it it even tracks my lamps with 2 spots)
and last but not least the spotsize!

This is why I used 3 leds aimed slightly towards each other (it theoretically has a spread of 45 deg to either side)
I shared the fusion 360 file for my led mount on github.

As far as electronics goes, if you want low power consumption, ditch the resistors and finely adjust the voltage to be within spec of the led.
For example this:
https://aliexpress.com/item/32899665271.html
The reason being that the resistors just burn off the excess voltage to the point where the led won't pull too much current.

Took 2 pics of these after mounting them, will take more when I have printed some more of these led mounts (might add them to the telly)

JayBee if you could send me the sketch so I can change the pins to fit my gun as is, I'll test it thoroughly today ;D

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