I see what you mean. It’s a pity because some of us actually want to retain the USB charging. I wish more manufacturers would integrate the USB charging into tnr battery tube like the Haikelite SC01/SC02. Thanks anyway JasonWW
Mind if I ask what parameters you used for Anduril?
I wonder, because I’ve decided that’s what I want to flash onto the H03 drivers you’ve sent me.
I’ve been doing some research, and the closest I can find is something in the main Anduril thread where someone said “The TA uses 3 power channels, so the #define for the FW3A might work.”
So I’m assuming that’s a good starting point? Does anyone know if this still holds true?
Sorry, I know Anduril isn’t your thing and you’re just getting started in it. I just love this UI so stinking much I flashed all my compatible lights over to it already.
I need another 15mm driver with presoldered 2× 2-inch wires and a short spring. Plus a custom programming as follows. What would be the cost of this? Thank you!
Ok thanks! The ramping table, as in the code that tells the driver exactly how to combine the fet and 7135 to get the correct current for each step in the ramp? I assume that changes depending on hardware config?
Sorry, this is the wrong place for this. BLF is hard to navigate through all the information.
Oh man that would be great! That makes sense. I can definitely wait, tracking says they should be here in a day or two. Can you send me the hex too? Atmel studio has been giving me fits, and I haven’t gotten around to setting up an ubuntu environment, so just dropping the hex in there is ideal until I get around to customizing things.
I think Lexel is saying that if you use a 1/255 on the AMC 7135 channel the current will be too low and the led will not light up. So lowest he uses for the AMC is either 2 or 3.
I really dont know, I’m just translating for Lexel.
I think he’s saying that on a FET only driver (1 channel) you have a huge range of brightness levels from many amps down to milliamps and you can use that step 1 of 255 and the led will light up just fine. In fact it may not get dim enough for a true moonlight.
On a 2 channel driver which is using a single AMC 7135 chip the range of amperage is much smaller. Max is only 350 miliamps and if you use 1 of 255 the output is so low the led might not light up.
We use 8 Bit dimming per channel from the MCU so 256 levels
of course 0 does not count, so we got 255 steps left
FETs are pretty fast in switching so with 20kHz PWM we have 50us for a full PWM cycle
50us/256 we get about 200ns
the AMC is a current regulator and on the lower end the very short PWM cycles do barely switch current through its like a low pass filter, the shorter the on cycle in the PWM is the higher is its frequency change from low to low
So 8 bits is like: 00100010
There are a total of 255 different combinations of ones and zeros. Each of these “steps” represents an amperage and brightness level for that channel.
This is for each channel? I wasn’t sure about that. I thought maybe it was 255 steps for all channels. Anyway…
So the MOFFET’S you use typically cycle on and off 20,000 times per second.
So 20,000 units into 1 second = 50 microseconds.
50 microseconds divided by 255 steps gives you an even smaller 200 nanoseconds.
I don’t understand beyond this. I’ll have to think about it and PWM later.
So I think my earlier translation was right. With only one AMC 7135 and 350mA if we divide this up into 255 sections, the lowest (a 1 out of 255) is not likely to light up the led. Lexel seems to usually only go down to 2 or 3 out of 255 to get that very dim moonlight.
@Level: For the Q8 4P linear driver: Is it possible to buy the driver with a soldered brass ring or does that need to be harvested off an existing driver?