New 105D. replacing Nanjg-105c @ FT? (no stars!)

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WarHawk-AVG
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wight wrote:
Fritz t. Cat wrote:
I don’t see what the extra three resistor spots are for.
The stars on this version, while functional, are mainly for show. R3/R4/R5 are where you easily bridge each star to GND. A pick-n-place machine or assembly worker can easily place a zero-ohm jumper across those pads.

ding ding ding Smile
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105e seems perfect for the off time cap…but it’s the 20mm version so watch out…

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and 7135 38s!

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I was wondering how they achieved such good spacing from the edge.. 20mm explains it.

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keltex78
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I ordered a couple of these to try from FastTech:

https://www.fasttech.com/p/1127403

8x AMC7135 generic driver with star-selectable mode groups:

A couple of interesting observations; the spring is much larger, making it much more useful than the factory spring on the 105c. Also, the above pic from FT doesn't show it, but the stars are printed in two pieces, so you just bridge the two halves to make your mode selection. I haven't installed one yet to check how the PWM, fit, and mode groups work out.


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Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

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I’d sure like to see these sold with a threaded retaining ring narrow enough not to short-circuit components to ground.
Or — at least — specifying the inner diameter required for a retaining ring, to be used with the driver. And selling the rings.

wight
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keltex78 wrote:
I ordered a couple of these to try from FastTech:
https://www.fasttech.com/p/1127403
8x AMC7135 generic driver with star-selectable mode groups:
https://fasttechcdn.com/products/112/1127403/1127403-3.jpg
A couple of interesting observations; the spring is much larger, making it much more useful than the factory spring on the 105c. Also, the above pic from FT doesn’t show it, but the stars are printed in two pieces, so you just bridge the two halves to make your mode selection. I haven’t installed one yet to check how the PWM, fit, and mode groups work out.
ardvaark @ FT says that it’s not an ATtiny13A (pulled it off the board and USBASP wouldn’t play with it). – http://www.fasttech.com/forums/1127403/t/1002171/attiny-mcu

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

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Yeah, you can see in the pictures that it's not an attiny.  There are also cheaper ak-47 and ak-101 drivers out there that are nearly identical, except for the MCU.  Apparently the "a" in ak-47a and ak-101-a stands for 'Atmel' or 'attiny'.  When I was looking at having custom drivers mass produced, you can save about $0.50 per driver by using one of the cheap MCUs vs. an Atmel.  

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wight
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RMM wrote:

Yeah, you can see in the pictures that it’s not an attiny.  There are also cheaper ak-47 and ak-101 drivers out there that are nearly identical, except for the MCU.  Apparently the “a” in ak-47a and ak-101-a stands for ‘Atmel’ or ‘attiny’.  When I was looking at having custom drivers mass produced, you can save about $0.50 per driver by using one of the cheap MCUs vs. an Atmel.  

I don’t normally trust myself just eyeballing the package (although I do make a judgement). Thanks for the other info, that’s somewhat interesting. I’ve always wondered how Nanjg ended up using the more expensive part and riding it to that kind of success.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

LinusHofmann
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wight][quote=RMM wrote:
I’ve always wondered how Nanjg ended up using the more expensive part and riding it to that kind of success.

A shipment of Atmels fell of a truck perhaps? Wink

purduephotog
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Ack. Ordered 105c for 2 months and just looked at the pn to find it as a 105d.

I’d been planning on using another driver as an ultra low power led flashlight. No go with this one until I either reprogram it or figure something else.

Boss is gonna be annoyed… Promised him 10x led flashlights almost a month ago.

Anyone know of another good low power driver that I could get down to about 10ma or lower and no blink./pwm?

wight
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purduephotog wrote:
Ack. Ordered 105c for 2 months and just looked at the pn to find it as a 105d.

I’d been planning on using another driver as an ultra low power led flashlight. No go with this one until I either reprogram it or figure something else.

Boss is gonna be annoyed… Promised him 10x led flashlights almost a month ago.

Anyone know of another good low power driver that I could get down to about 10ma or lower and no blink./pwm?

You haven’t mentioned what makes the 105d unsuitable for your purpose.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

RMM
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To get down to 10mA you would have to reprogram anyways, so what's the problem with the 105D?

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Sirius9
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boss likes to have stars on his drivers Big Smile

 

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Epic reply:)

Actually I had planned on using the stars to get low mode only and then do the testing. But now I don’t have that option and I’ve got to order the new programmer… Assuming it can be. I haven’t even looked at the chip. Still trying to chase down why the other driver doesn’t lower the current after 10 ohms.

wight
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purduephotog wrote:
Epic reply:)

Actually I had planned on using the stars to get low mode only and then do the testing. But now I don’t have that option and I’ve got to order the new programmer… Assuming it can be. I haven’t even looked at the chip. Still trying to chase down why the other driver doesn’t lower the current after 10 ohms.

There was never a ‘low only’ star on either the 105c or 105d.

Did you mean to say 10 ohms? I can’t think of any situation where 10 ohms makes sense in this context!

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Sirius9
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105D can be reprogramed, I know because I ordered 5 × 105 C -8 AMC chips and 5 × 105 C -6 AMC chips and instead I received 9 × 105 D – 8 AMC chips and 1 × 105 D – 6 AMC chips…
Stars are great soldering points if you use firmware for electronic switch which is what I neede them for Sad I can still use them with electronic switch but it is a realy realy PITA to solder wires directly to MCU.

 

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Yep. I’m looking for a corny regulated driver with a sense resister that I calculated around 20 ohms. It isn’t working. So I’ve a new one now to figure out.

Just extra trouble I didn’t need in this job market.

Werner
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Lol 20 ohms sense resistor :bigsmile:

purduephotog
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Werner wrote:
Lol 20 ohms sense resistor :bigsmile:

When you need a regulated 1 ma source…. For the first time I don’t need more current. I need less. A lot less. Accurately less. No flicker pwm less.

It’s hard.

wight
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purduephotog wrote:
Werner wrote:
Lol 20 ohms sense resistor :bigsmile:

When you need a regulated 1 ma source…. For the first time I don’t need more current. I need less. A lot less. Accurately less. No flicker pwm less.

It’s hard.

It seems that you are seriously misunderstanding something or multiple things.
  • None of the drivers being discussed here would ever do what you want. If you purchased a 105c for accurate 1mA output you made a mistake. This is not the thread you are looking for.
  • What driver did you attempt to use first? 20 ohms suggests an extremely low sense voltage!
  • I question the need for an accurate 1mA supply for an LED What could you possibly be doing? It seems odd is what I’m saying! Why won’t a very rough, approximate, 1mA be good enough?
  • Is an accurate 1mA really that difficult? There are many multi-channel LED driver ICs intended for that range. Surely some of them must have tight enough regulation for your purpose?
  • Also take a look at the first link under WIP in my sig, “17mm double-sided & 20mm+ single sided 4Amp+ linear driver [A17LDX]”. I suspect that this may do what you need.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

purduephotog
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Actually Google led me here.

I bought, paid for, and planned on modifying a 105c. I received something very different in the mail but didn’t realize it because I wasn’t in a position to work on it. Instead I got a D version with some pretty different characteristics.

Since it was my backup plan, I wasn’t too concerned until this thread showed there was an E version with a different MCU.

You see budget FLASHLIGHT but I’m intending the use for another effort. Yes I can get access to ICs that have lower currents but they require a PCB and fab time.

As for the precision… I realize the number of lumens or photons emitted might seem imprudently emphasized. What I work with for prototyping it’s very important.

My apologies for the chime in for an item I did not order.

wight
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purduephotog wrote:
Actually Google led me here.

I bought, paid for, and planned on modifying a 105c. I received something very different in the mail but didn’t realize it because I wasn’t in a position to work on it. Instead I got a D version with some pretty different characteristics.

Since it was my backup plan, I wasn’t too concerned until this thread showed there was an E version with a different MCU.

You see budget FLASHLIGHT but I’m intending the use for another effort. Yes I can get access to ICs that have lower currents but they require a PCB and fab time.

As for the precision… I realize the number of lumens or photons emitted might seem imprudently emphasized. What I work with for prototyping it’s very important.

My apologies for the chime in for an item I did not order.

I understand that you didn’t get what you ordered. The lack of Google hits for 105d was part of why I saw fit to start this thread. That wasn’t really my point though.

What I was getting at was more along the lines of “why don’t you spill the beans and maybe we’ll help you do what you at trying to do” since it seems that your efforts so far have been pretty far off base. You also specifically said flashlights in your first post. Come to think of it, you also said 10mA, then later said 1mA? You’re still welcome to spill the beans and get help.

The E version does not have a different MCU.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

purduephotog
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wight wrote:
purduephotog wrote:
Actually Google led me here.

I bought, paid for, and planned on modifying a 105c. I received something very different in the mail but didn’t realize it because I wasn’t in a position to work on it. Instead I got a D version with some pretty different characteristics.

Since it was my backup plan, I wasn’t too concerned until this thread showed there was an E version with a different MCU.

You see budget FLASHLIGHT but I’m intending the use for another effort. Yes I can get access to ICs that have lower currents but they require a PCB and fab time.

As for the precision… I realize the number of lumens or photons emitted might seem imprudently emphasized. What I work with for prototyping it’s very important.

My apologies for the chime in for an item I did not order.

I understand that you didn’t get what you ordered. The lack of Google hits for 105d was part of why I saw fit to start this thread. That wasn’t really my point though.

What I was getting at was more along the lines of “why don’t you spill the beans and maybe we’ll help you do what you at trying to do” since it seems that your efforts so far have been pretty far off base. You also specifically said flashlights in your first post. Come to think of it, you also said 10mA, then later said 1mA? You’re still welcome to spill the beans and get help.

The E version does not have a different MCU.

Error some of that is android and it’s wonderful auto correct.

There isn’t really beans to spill. I work with photometrically sensitive films. The can’t have any sort of exposure and they can only tolerate certain wavelengths.

So somewhere in the interpolated emission charts 1 to 10 ma would give me the desired photon flux such that a human eye can navigate under night vision but a radiometric sensitive emulsion would not appreciably fog.

Kinda a fun problem I’ve licked in the past.

Can always apply nd filters to the emitter to knock down the flux. Don’t have any ideas yet until we measure how many photos actually will dog the emulsion.

wight
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purduephotog wrote:
Error some of that is android and it’s wonderful auto correct.

There isn’t really beans to spill. I work with photometrically sensitive films. The can’t have any sort of exposure and they can only tolerate certain wavelengths.

So somewhere in the interpolated emission charts 1 to 10 ma would give me the desired photon flux such that a human eye can navigate under night vision but a radiometric sensitive emulsion would not appreciably fog.

Kinda a fun problem I’ve licked in the past.

Can always apply nd filters to the emitter to knock down the flux. Don’t have any ideas yet until we measure how many photos actually will dog the emulsion.

That’s much more engaging as far as I’m concerned. Are the films for scientific purposes?

ND filters makes sense.

What driver did you try earlier?

I do think that the QX7136 is probably a good fit. It sounds like you want single-mode, so in that application it would be completely constant current. You don’t even need an external MOSFET for such a low current, it has an internal one you can use.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Ronin42
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I’m and idiot, but isn’t that what red lights are for?

as an FYI did you know about:

650nm-670nm Photo Red that Cree makes?

Product Index > Optoelectronics > LED Lighting – Color > XPEPHR-L1-0000-00901

All prices are in US dollars.
Digi-Key Part Number XPEPHR-L1-0000-00901CT-ND Price Break Unit Price Extended Price
1 3.43000 3.43

Quantity Available Digi-Key Stock: 872
Can ship immediately
Manufacturer Cree Inc

Manufacturer Part Number XPEPHR-L1-0000-00901
Description LED PHOTO RED 650NM 700MA

(“It’s good that most people can’t remember their previous lives. Otherwise
things would be a lot more complicated than they already are.”
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purduephotog
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Ronin42 wrote:
I’m and idiot, but isn’t that what red lights are for?

as an FYI did you know about:

650nm-670nm Photo Red that Cree makes?

Product Index > Optoelectronics > LED Lighting – Color > XPEPHR-L1-0000-00901

All prices are in US dollars.
Digi-Key Part Number XPEPHR-L1-0000-00901CT-ND Price Break Unit Price Extended Price
1 3.43000 3.43

Quantity Available Digi-Key Stock: 872
Can ship immediately
Manufacturer Cree Inc

Manufacturer Part Number XPEPHR-L1-0000-00901
Description LED PHOTO RED 650NM 700MA

No, you are not, but not all films are red insensitive.

That’s mostly due to the type of silver chloride used. Other find that have, say, sensitivity to ir or UV might have different wavelengths of less sensitivity.

For standard bw film though you’d be right.

purduephotog
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Well I am an idiot. I calculated I’d need a6x reduction in luminance to hit my ultra low target. That meant a 50 ohm pot. Didn’t work.

Put a 50k pot on there… Hit the ultra low luminance.

Need to do actual measurements in the sphere tomorrow.

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:bigsmile:

For those that were wondering how this ended up, my ultra-low-LED flashlight was considered ‘too bright’ with a 252kohm resistor on it for sensing current. I’ve been meaning to go back and measure the current with a fluke but the last time I tried it didn’t go low enough…. and I’m not taking a flashlight over to the NIST lab for testing.

I couldn’t accurately measure the flux on most instruments. The reflector was causing most of the problems due to the focus of the beam- which was why it was designed that way.

But at least I had fun and got a SOIP programmer Smile

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