Gun talk - Sega Type-II IR Gun setup

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twistedsymphony:
I posted a link to a gameplay video when I revived this thread you can see the LEDs are on but they're flashing too fast to make out a pattern.

here's the link again: https://www.instagram.com/p/BBf8TNyTGM-/?taken-by=twistedchu

Howard_Casto:
I saw the video but tbh I can't make out the leds. I'm assuming it's the white dots on the boards.

They might not be flashing at all. Leds often shimmer just from the oscillating power.

twistedsymphony:
Yeah the white dots in the center of the board... maybe I'll see if I can get better video with a different camera, I have a nice HD camcorder but I'd suspect it has an IR filter... we'll see.

As for that 5-pin chip... I don't think it's a flip flop. the 8-pin IC uses all 8 pins for a single flip-flop, so it'd be 3-pins shy.
Based on other chips I'm seeing in this size I'm guessing it's either something simple like a NOT gate or a low voltage transistor being used as a logic gate. I also see a few manufacturer using this size chip as a sort of diode pack.

Howard_Casto:
Well I found a pinout for the led arrays and it is a bit confusing to me.

The pins are:

12v
5v
C
B
A
GND

So no data lines really by the sound of that. You've just got three lines period. Also having 12v AND 5v is a bit odd. If you have 12v what do you need 5v for? I can only guess 5v to trip the transistors and 12v to actually power the leds, but if that's the case what do lines A-C do?

The boards are all generic right? I'm having a hard time figuring out what, if any, blink pattern these could create piggy-backed using 1997 tech.

BadMouth:

--- Quote from: Howard_Casto on February 10, 2016, 09:10:25 am --- but if that's the case what do lines A-C do?

The boards are all generic right? I'm having a hard time figuring out what, if any, blink pattern these could create piggy-backed using 1997 tech.

--- End quote ---

Addressable LEDs before their time?

If they are all identical but do something different when placed in different positions, there must be some method for them to figure out where they are and what they need to output differently from the others.
I guess they wouldn't really need to know where they are. The gun could figure that out during calibration.
They would need to know to do something different than all the other boards.

Gotta be some type of communication. Maybe not data, but a pattern or amount of voltage or resistance.

EDIT:
--- Quote from: twistedsymphony ---I do believe the order of the sensors in the chain matters though. It starts one in from the bottom right of the screen then goes around clock wise ending on the bottom right.

--- End quote ---

So the main board knows what pattern the chain is laid out in...
Some variable is changing as you progress through the chain which affects the pattern.
At the edge of my skill level here, but that flip-flop chip twistedsymphony sounds like it has a clock that's variable based on the voltage of an input.

My work (at work) is piling up while I'm chewing on this.
I feel like if I could sit down and focus on it for an hour or two, I could figure it out. :angry:

The more I read up on this stuff, the more it sounds like the clock is jut there to synchronize stuff.
Are we sure that each board is flashing at a different rate?

Since the LEDs form a square, the gun could know where it was as long as a corner was in view.
Maybe any flashing is just for the sake of preventing IR light from other sources such as reflections from affecting it.

Even if that's not the case, maybe we could hack something together that uses a rectangular outline of IR LEDs and works as long as a corner is in view.

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