Arc AAA mode
- Thread starter Spidey82
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PeLu
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Spidey82:
Is there anyway to use the arc in moon mode even when i have brand new batt in it<HR></BLOCKQUOTE>
One of my ArcAAAs has a somewhat oxidized battery contact and it needs sometimes additional squeezing to get it into 'sun' mode. You may use a piece of these conductive rubber which will be shortened when you press it down more. Should be easy to do. So you will have a two stage switch..
Maybe I'll give it a try today.
Is there anyway to use the arc in moon mode even when i have brand new batt in it<HR></BLOCKQUOTE>
One of my ArcAAAs has a somewhat oxidized battery contact and it needs sometimes additional squeezing to get it into 'sun' mode. You may use a piece of these conductive rubber which will be shortened when you press it down more. Should be easy to do. So you will have a two stage switch..
Maybe I'll give it a try today.
Steelwolf
Flashlight Enthusiast
I don't believe that there is any point in using the conductive rubber. Your sole purpose for running in moon mode is to save battery life. The rubber acts like a resistor, so burns up energy.
Currently, the only way I can think of doing it is to design another PWM module in between the battery and the head which is designed to deliver lower output voltage. I believe the cutoff criteria is the voltage of the battery. If a lower voltage is delivered, it might fool the lamp in to thinking that the battery is dying and switch to moon mode.
How to do it??? Beats me.
Currently, the only way I can think of doing it is to design another PWM module in between the battery and the head which is designed to deliver lower output voltage. I believe the cutoff criteria is the voltage of the battery. If a lower voltage is delivered, it might fool the lamp in to thinking that the battery is dying and switch to moon mode.
How to do it??? Beats me.
PeLu
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Steelwolf:
I don't believe that there is any point in using the conductive rubber... The rubber acts like a resistor, so burns up energy.
<HR></BLOCKQUOTE>
Of course it will reduce the efficiency, but on the other hand the LED and the circuit will run at a higher efficiency.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
Currently, the only way I can think of doing it is to design another PWM module in between the battery and the head<HR></BLOCKQUOTE>
You and I, we have completely different attempts: I want to make the simple and easy working solution.
Your idea it IMHO not realistic. And your another PWM module will be not better in efficiency than the resistor solution.
I don't believe that there is any point in using the conductive rubber... The rubber acts like a resistor, so burns up energy.
<HR></BLOCKQUOTE>
Of course it will reduce the efficiency, but on the other hand the LED and the circuit will run at a higher efficiency.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
Currently, the only way I can think of doing it is to design another PWM module in between the battery and the head<HR></BLOCKQUOTE>
You and I, we have completely different attempts: I want to make the simple and easy working solution.
Your idea it IMHO not realistic. And your another PWM module will be not better in efficiency than the resistor solution.
Steelwolf
Flashlight Enthusiast
PeLu, You might be right. Certainly, the best PWM circuits only have about 90% efficiency? And very difficult to design and build too.
But do tell us how your test with the conductive rubber went. Did you get the Arc-AAA in to moon mode? How much longer did the flashlight run?
BTW, please explain a little more about the conductive rubber.
But do tell us how your test with the conductive rubber went. Did you get the Arc-AAA in to moon mode? How much longer did the flashlight run?
BTW, please explain a little more about the conductive rubber.
PeLu
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Steelwolf:
PeLu, You might be right. Certainly, the best PWM circuits only have about 90% efficiency
<HR></BLOCKQUOTE>
The Arc AAA's circuit is far below that (I have the numbers, but I don't know if I should post them). Actually all circuits for single cell use are pretty low there
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
But do tell us how your test with the conductive rubber went.
<HR></BLOCKQUOTE>
Unfortunately I could not find any at home, so I have to look at work.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
BTW, please explain a little more about the conductive rubber.<HR></BLOCKQUOTE>
They are used in (cheap) PC keyboards. There should be plenty of broken ones at work. But I do not have real data of them, so I have just to try it. Today we prefer to be outdoors.
I have some other vague ideas how to do it...
PeLu, You might be right. Certainly, the best PWM circuits only have about 90% efficiency
<HR></BLOCKQUOTE>
The Arc AAA's circuit is far below that (I have the numbers, but I don't know if I should post them). Actually all circuits for single cell use are pretty low there
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
But do tell us how your test with the conductive rubber went.
<HR></BLOCKQUOTE>
Unfortunately I could not find any at home, so I have to look at work.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
BTW, please explain a little more about the conductive rubber.<HR></BLOCKQUOTE>
They are used in (cheap) PC keyboards. There should be plenty of broken ones at work. But I do not have real data of them, so I have just to try it. Today we prefer to be outdoors.
I have some other vague ideas how to do it...
Gransee
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Spidey82:
could a switch be redesign to allow the circuit to go moon mode??
peter u reading this?
Linfeng<HR></BLOCKQUOTE>
Yes to both questions. As regulars to the CPF know, the "dimmer control" and "switch" topics have been covered here before.
Adding a switch to a flashlight certainly provides many advantages. But to be fair, there are also disadvantages when you add a switch.
Peter Gransee
could a switch be redesign to allow the circuit to go moon mode??
peter u reading this?
Linfeng<HR></BLOCKQUOTE>
Yes to both questions. As regulars to the CPF know, the "dimmer control" and "switch" topics have been covered here before.
Adding a switch to a flashlight certainly provides many advantages. But to be fair, there are also disadvantages when you add a switch.
Peter Gransee
PeLu
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Gransee:
Adding a switch to a flashlight certainly provides many advantages. But to be fair, there are also disadvantages when you add a switch.<HR></BLOCKQUOTE>
What I want to accomplish with minimal effort is something which I can press together and that will be shortet out then.
As I wrote before, I'll try one of these conductive rubbers (but I have no idea bow if their conductance is in the range where I need it). If you screw down the ArcAAA it will make contact (as it is now) but via the resistor. If you screw down more, the resistor is shorte and it works in 'normal' mode. This should be a simple part just to drop in.
Everything else is IMHO unrealistic.
What I'm wondering about is the pretty big hysteresis switching in between the two modes (and which is necessary).
Adding a switch to a flashlight certainly provides many advantages. But to be fair, there are also disadvantages when you add a switch.<HR></BLOCKQUOTE>
What I want to accomplish with minimal effort is something which I can press together and that will be shortet out then.
As I wrote before, I'll try one of these conductive rubbers (but I have no idea bow if their conductance is in the range where I need it). If you screw down the ArcAAA it will make contact (as it is now) but via the resistor. If you screw down more, the resistor is shorte and it works in 'normal' mode. This should be a simple part just to drop in.
Everything else is IMHO unrealistic.
What I'm wondering about is the pretty big hysteresis switching in between the two modes (and which is necessary).
Steelwolf
Flashlight Enthusiast
PeLu, Any update on your mod?
PeLu
Flashlight Enthusiast
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Steelwolf:
PeLu, Any update on your mod?<HR></BLOCKQUOTE>
Was not able to use a computer for some time (meaning: being underground).
The rubber I tried did not work at all, it's conductivity is much to low. I have to try another one.
PeLu, Any update on your mod?<HR></BLOCKQUOTE>
Was not able to use a computer for some time (meaning: being underground).
The rubber I tried did not work at all, it's conductivity is much to low. I have to try another one.
