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FrozenGate by Avery

The mistery of the Dilda circuit.

  • Thread starter Thread starter Deleted member 8382
  • Start date Start date
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Deleted member 8382

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It's generally accepted that using 3.6V batteries boost the power on it because at 6V it's not even regulating. Today, I was trying to find at what voltage it starts to regulate, but the results have been a little strange.

I asumed it's using a linear driver because it just looks like that for me (current measurements were taken on the batteries).

The current stays at 330mA no matter if the voltage is 6V or 9V. I don't remember the exact number, but it starts regulating at 5V or so. From this, I've got two questions:

1.-Can you tell me what current is your dilda working at? To test this just put your multimeter in amp mode and test the current where the button is.

2.-If posible, could you repeat the tests I've done? If it's the same for everyone? Why does everyone registers a boost with the 3.6V batteries?

Yours,
Albert
 





I have the same results .32A no matter the voltage.

I used 2x 3v and 2x 3.6v
 
Hey Albert...
I'm pretty sure that the 200mW Red Dilda driver is not regulating like a
standard LM317 circuit..

Read the info here...

http://laserpointerforums.com/f50/amazing-322mw-dilda-36122.html

Everyone is registering a Boost because even my Laser Power Meter
does not lie... 3.6Volt Batteries increase the Power of the Laser from
using 3.0Volt batteries...

Don't forget that you need a 3.6Volt Charger to charge 3.0Volt batteries
and a 4.2Volt Charger to charge 3.6Volt batteries...

A charger for 3.0V batteries will NOT fully charge 3.6Volt batteries...


Jerry
 
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for some reason I am not seeing a boost. it drops from 204mW down to 168 with the 3.6v batteries. They might be dead or something so I will get back to you guys about that after thanksgiving.
 
That's for sure... that your 3.6V batteries are depleted if the Dilda
puts out less with them than your 3.0V batteries...

Jerry
 
Dildas burn so good but look so ugly the only reason why I wont buy one lmao
 
I've read this thread today to make sure I had not dream it. anyway, then the thoery is that although this circuit does always take the same current from the batteries, the more voltage you put in the more current it delivers to the diode? What a strange circuit then!

I'll have to test against my new hlpm if the power is increasing or not. I guess if I unfocus the dot a bit I'll be able to control power variations safely right?

I think there are 3 options:

1.-The circuit is just like what I said some lines above
2.-The circuit is a normal linear driver, just that at 12V it's over the regulation limits (wouldn't explain why members reported higher powers at 8V)
3.-The circuit on this laser has been changed (I don't think so)

Anyway, keep posting the current readings on your dilda. The one I tested is from Dealextreme. This will tell us if the ones from O-like are really good units or they just adjust the pot (I don't think so, but anyway, not bad to confirm it :D)

yours,
Albert
 
Marcusss said:
Dildas burn so good but look so ugly the only reason why I wont buy one lmao
Click to expand...

Then you miss out on a Great price for a guaranteed 200mW Red Laser...

I own 6 of these...:na:

@ Albert... all my 200mW Dildas are from DX...


Jerry
 
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Wow. Just tried this tonight. Was always not too incredibly pleased at the output of my Dilda as compared to my WL P75.

... 3.6's vs 3.0's sure did the trick.

It's like a whole new laser. Turned it on, and, well, had to do a double take. (I only wish I got another one of these while they were still importable into the US.):undecided:

(... As for the measurement, where do you want it? Across the switch while on?)
 
Yes, use the multimeter on amp mode as switch. one wire touch the back of the battery and the other touch the case inside. test with both type of batteries please :D
 
Ok, I have fully charged my 3.6v cr2 batteries and I still dont get a boost out of my dilda.

when I increase the voltage from 6.4 to 8.4 my laser power remains at 204mW.

what kind of increases are you guys getting with more voltage?
 
It's possible that the current is regulated only on the old style dilda.
 
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Well the current draw remains the same at .32A. I wonder if the extra energy is just being turned into heat.
 
Uhm ..... not 100% sure, but as far as i remember, the dilda units uses a double-op-amp configuration regulator, with a power transistor for the output ..... some units have a 358, some others an lmc272c, as op-amps, but basically the circuit is the same.

strange that it have an increase in power, being a feedback-driven current regulator ..... i mean, if the circuit do a current regulation, is strange that it increase just changing the power ..... except, maybe, in one case ..... if the current is planned for the higher voltage, and using the lower one, it just is not enough for keep the planned one ..... but this is also more strange .....


Edit: wait, current measure on battery side ? ..... not on the diode ? ..... or also just measuring the voltage at the sides of the big resistor and converting it ? :confused:
 
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