Hi wyvern, I don't think everyone has a diode marked as a106. Can you give a better description of which component. There are front and back pictures posted in the original 110 mod thread, maybe you could repost those pictures with the component your talking about circled.
The 110's have two transistors in series controlling the LD's current. By shorting out the capacitor you have removed one saturation voltage drop from the "lower" transistor and permitted a slightly higher base current to flow through the "upper" transistor providing a lower saturation voltage. The reduction in voltage drops permitted a higher LD voltage and a higher LD current.
It makes more sense now I know its a cap, and you are 100% right, I take my hat off to you, what a good mod. I have a 110 here with 2, mods. I have one resitor shorted, and the photodiode now lives inside the battery compartment! This mod of yours works, my unit now draws 560ma from my bench power supply (is this a 110 record).
Sorry I was so negitve at the start (it was the diode thing), thanks for a really good mod.
By the way this mod makes my red LED glow dimmer, does it do that on yours ?
Now that we're able to reach currents surpassing 500ma with this new mod is there a resistor we need to change out to keep the extra current from frying the circuit? It would be the equivalent of changing the 2k for the 3.3k on the 105 model, or is this not neccesary for the 110?
yes my led did glow dimmer (i think it was ready to blow) but i feel an led is a waste of mA so i got rid of that too
i still have the photodiode in place and seems to make no difference, it seems we were initialy wrong in thinking it was there to limit the beam to 5mW
i do have a rough schematic i have drawn up, im not sure if i've found all the via's on the board so i will post it soon
I ordered a wicked extreme mx because I couldnt see why to spend more money on leadlights and spend weeks modding them only to overdraw the diode and eventually ruin them, but I got to admit, modding these things is the fun part, Im still waiting on my mx but ill post a review. Oh yeah I bought a big 6 inch light bucket reflecting telescope with 600x magnification!!!!! [img]/ubbthreads/images/graemlins/paypal.gif[/img] So I will find a spot somewhere deep in the country where it is flatland and ill have to find a large hill or somewhere to setup the telescope, and I will have to find a large object in the distance and see how far the mx will go. I know it claims 45 miles but I doubt if I can acurately measure these kind of distances but ill give it a try.
Deezdrama, just to remind you that discussions about pointing >5mW lasers in the sky without termination points and / or proper license is not tolerated! [img]/ubbthreads/images/graemlins/mad71.gif[/img]
Dito to K-T, and as this isn't the first time we are telling you this, take this as your last warning before your posting privileges will be removed.
bernhard
I have a box of these 110 units, I did this mod on 3 of them and got good results till I fried one and now realize that we are pulling 600ma current draw. How can we get the current draw to 450ma???
My advice is to "de-mod" your pointers back to original condition, before you have a box of useless junk.
The A106 capacitor mod totally defeats the current limiting to the LD, and is the most ill-conceived "mod" I've ever encountered. With the APC circuit defeated in this way, the LD current is dependant only on the battery's impedance and the pass transistor(s) saturated (full ON state) voltage drop, which ain't much limitation at all. Worse, the current in this condition can spike to very high levels, and the steady-state current is unpredictable - and will vary widely over temperature changes. If you are doing this mod, you might as well eliminate all the drive electronics and simply put a resistor in series with the LD's battery connection, at least the current limit point would be somewhat constant...of course this is a stupid idea, which is my point. Too many people are being taken in by this kind of modification, and are throwing money in the toilet for the sake of an expedient "solution". Bah.
I have posted a far better mod on this forum - and furthermore have found that with the factory values (shown in my reverse-engineered schematic), the LD current can be adjusted anywhere within the LD safe operating range - and beyond. Leadlight did a fine job with this design and it needs only my mod to allow it to work reliably with two AAA cells (it works great without mods above 3.5V).
new leadlight 110 mod!!!
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