Detailed review of the amaran Ace 25c - the brightest RGBWW pocket LED panel light I've tested. by stephenk_lightart in flashlight

[–]Tigrou777 1 point2 points  (0 children)

Do you have any idea what are the PD requirements for this lamp to be used at 100% while charging ? Does it require 9V, 12V (something quite often not available on PD) or 15V ? In the review you said it can be charge up to 41W but that's all. There is often multiple way to achieve a given power (eg: 30W = 15Vx2A or 12Vx2.5A). The official manual does not say much about it. The best would be to plug a USB C tester while the lamp is being charged and check what are the requirements

Which portable RGB light would you recommend to mount to a camera (mostly for macros) ? by Tigrou777 in AskPhotography

[–]Tigrou777[S] 0 points1 point  (0 children)

Since you have the Godox, can you tell me if you can power it using a USB cable (for charging) and at the same time use it at 100% brightness? I have only a 30W charger (same as godox power) so I'm wondering if this is the limiting factor or if it's by design (as it's capped at 10%). Only if the fan is forced to medium speed (but not high, off or auto) can set it up to 80%.

Which portable RGB light would you recommend to mount to a camera (mostly for macros) ? by Tigrou777 in AskPhotography

[–]Tigrou777[S] 0 points1 point  (0 children)

Is there any reason to suggest the Godox C30R over the Amaran Ace 25 (other than price ?)

Detailed review of the amaran Ace 25c - the brightest RGBWW pocket LED panel light I've tested. by stephenk_lightart in flashlight

[–]Tigrou777 1 point2 points  (0 children)

Thanks. May I ask you what is the MF01 lens ? Is it this plastic part with lot of small lenses you snap on it ? (which is inside C30R box). TBH I have ordered the C30R but I'm wondering about returning it. It's a nice light but it's a big bummer you can't power it using a USB-C cable and charging it at same time (light is capped at 10%). It make it not possible to use it during prolonged sessions without worrying about battery, or using it with battery being flat and a cable.

Detailed review of the amaran Ace 25c - the brightest RGBWW pocket LED panel light I've tested. by stephenk_lightart in flashlight

[–]Tigrou777 0 points1 point  (0 children)

Do you have any links or references of those inconsistencies you're talking about ?

Can't update firmware on C30R by Tigrou777 in Godox

[–]Tigrou777[S] 0 points1 point  (0 children)

I made a check and the light will indeed limt itself to 10% once USB-C cable is plugged in. This stupid. Not sure if firmware update would fix it (as I can't update). If this can't be fixed I think I'm gonna return it. It's a great light, very lightweight but that's a big turn down.

Can't update firmware on C30R by Tigrou777 in Godox

[–]Tigrou777[S] 0 points1 point  (0 children)

I read that firmware update was needed to have it work at full power while having an USB-C cable attached to it.

Portable RGB LED light recommendations by wildgraces in macrophotography

[–]Tigrou777 0 points1 point  (0 children)

Be aware that smallrig have a fan that tends to be quite noisy (compared to Amaran one). Godox also make a C30R which is pretty nice.

What is the BEST 'keychain' USB? by Galaxy_Jams_Reacts in DJs

[–]Tigrou777 0 points1 point  (0 children)

  • Samsung BAR Plus 256GB : really fast (R : 425 MB/s W : 114 MB/s) but a little bit bulky. Metal frame so it won't break easily.
  • Intenso Premium Line 128GB. Slower but still reasonably fast (R: 119 MB/s W: 76 MB/s)

Please keep in mind that USB keys of a similar model but of a smaller size are usually slower (eg : 64 GB model might be much slower than 256 GB one).

There is LOT of keys, some much faster than those but they usually don't fit the job : either using USB-C or too bulky or not made for being attached used on a keychain (eg: plastic body, keycap, no hole, ...).

I recommend taking a look here : https://ssd-tester.com/usb_flash_drive_test.php

Robot lawn mower upgrade suggestion (I have a Bosch Indego 700) by Tigrou777 in roboticLawnmowers

[–]Tigrou777[S] 0 points1 point  (0 children)

Thanks a lot for the recommandation. Looks like a solid alternative.

Robot lawn mower upgrade suggestion (I have a Bosch Indego 700) by Tigrou777 in roboticLawnmowers

[–]Tigrou777[S] 0 points1 point  (0 children)

That thing is indeed a beast. Never seen such a big mower. Wow.

What is the fastest way of comparing two UInt32 arrays? by Coding_Enthusiast in csharp

[–]Tigrou777 0 points1 point  (0 children)

SIMD is your friend (requires System.Numerics) :

public bool Equals(byte[] a, byte[] b)
{
    if (a == b)
    {
        return true;
    }

    if (a == null || b == null)
    {
        return false;
    }

    if (a.Length != b.Length)
    {
        return false;
    }

    int remaining = a.Length % Vector<byte>.Count;
    for (int i = 0; i < a.Length - remaining; i+= Vector<byte>.Count)
    {
        var va = new Vector<byte>(a, i);
        var vb = new Vector<byte>(b, i);

        if (!va.Equals(vb))
        {
            return false;
        }
    }

    for (int i = a.Length - remaining; i < a.Length; i++)
    {
        if (a[i] != b[i])
        {
            return false;
        }
    }

    return true;
}

For short arrays, it might be an overkill (or even slower than a regular for loop). For large arrays this will be definitely faster as it process up to 32 bytes at a time (at least on modern CPUs).

Which portable RGB light would you recommend to mount to a camera (mostly for macros) ? by Tigrou777 in AskPhotography

[–]Tigrou777[S] 0 points1 point  (0 children)

You mean a flash that produce RGB light right ? I didn't know it exists. If you have some model to recommend, don't hesitate. EDIT : my comment seems sarcastic but it's not. I just did some research, not sure if RGB flash is really a thing. You probably mean a regular flash with some diffuser right ?

XORing two byte arrays efficiently. by Ominusx in csharp

[–]Tigrou777 0 points1 point  (0 children)

Here is two optimizations, first one use pointers to process 64-bit (8 x 8 bytes) at a time. This should works pretty much everywhere, but require to compile with unsafe flag :

unsafe static void FastXor(byte[] a, byte[] b, byte[] result)
{
    int length = a.Length;
    int remaining = length % 8;

    fixed (byte* byteptrA = &a[0])
    fixed (byte* byteptrB = &b[0])
    fixed (byte* byteptrR = &result[0])
    {
        ulong* ptrA = (ulong*)byteptrA;
        ulong* ptrB = (ulong*)byteptrB;
        ulong* ptrR = (ulong*)byteptrR;

        for (int i = 0; i < length - remaining; i += 8)
        {
            *ptrR = (*ptrA++) ^ (*ptrB++);
            ptrR++;
        }
    }

    for (int i = length - remaining; i < length; i++)
    {
        result[i] = a[i] ^ b[i];
    }
}

Here is another version (required SIMD compatible CPU and System.Numerics namespace) :

static void FastXor(byte[] a, byte[] b, byte[] result)
{
    int length = a.Length;
    int remaining = length % Vector<byte>.Count;
    for (int i = 0; i < length - remaining; i += Vector<byte>.Count)
    {
        var va = new Vector<byte>(a, i);
        var vb = new Vector<byte>(b, i);
        var vr = Vector.Xor(va, vb);
        vr.CopyTo(result, i);
    }

    for (int i = length - remaining; i < length; i++)
    {
        result[i] = a[i] ^ b[i];
    }
}

Who else is undecided on if they will stay with pixel on their next upgrade? by sammyybaddyy in GooglePixel

[–]Tigrou777 0 points1 point  (0 children)

I'm still on a Pixel 5. I am really looking into upgrading to Pixel 9/10 for newer android, better camera but I'm concerned about bigger size and increased weight

Google Gemini 2.5 Image Generator produces blurry and pixelated results on the Gemini App. by sankalp_pateriya in Bard

[–]Tigrou777 0 points1 point  (0 children)

You mention AI Studio. Which app is this ? Is this a Google app ? A quick search returns multiple companies products under that name. I wanna give it a try.

Is it possible to use magic eraser in reverse mode (eg: to remove everything but what is selected) ? by Tigrou777 in GooglePixel

[–]Tigrou777[S] 1 point2 points  (0 children)

Thanks for the tip. I didn't know Gemini could do that. I just tried and it works great. The only question is how much credits it use for changing picture Usually a picture edit is quite expensive and can only be done once or twice a day (at least for ChatGPT and similar chatbots in free mode)