I received two 70mW DX units yesterday and did a few runs using 4 x 1.5V AA batteries. I can confirm that it works fine using this as a power source. It even ran of 4 x 1.5v button cells from the DX piggy lights, but was visibly dimmer.
The focus is very adjustable and the potentiometer did appear to make a bit of a difference.
The beam is quite wide on output (5mm), but can be focussed very nicely.
However....I've not yet managed the holy grail of being able to smoke or burn even the thinnest of black bin bags.
Has anyone else managed this?
The batteries that I was using were cheapo £-shop zinc jobs that I was using in my son's electronics learning kit and not best, and to top it all, the leads broke on my £5 multimeter so I couldn't confirm any current draw.
I'm going to retest this evening with some proper power source, but can I ask if anyone managed to do any significant burning with this unit?
Make sure you have enogh current. I first tried with a 5v 300mah psu and got the same result as you. Could not burn anything even when focused. When i changed to a 7.2v 800mah psu things SMOKED really good. I fried my mouse mat quit good ;D And plastic bags goes right though in a jiffy!
So it is possible? If the price is no problem, would it be better to buy one of those, and put my Senkat diode in there, or building my own driver? Im going to use it stationary, but i do not require a long duty-cycle.
Btw, i also bought my senkat premounted in a aixiz. Would it be a problem to take it out again of the aixiz? (This may be a stupid question)
Since i really don't need the extra cooling/long duty cycle, cant i just use it in the aixiz module and remove the "cooling cube"? And my soldering iron is broken, so can i just mount the diode in a socket, and then use "sugarcubes" to connect the socket to the circuitboard?
i have the 100 mw verson, and i found that when using 4 ni-mh batteries, it wasn't at full power. i added another battery, and it got brighter. i then tried using 6 batteries (btw, im checking current with a dmm) and the current went up by a few ma. the problem was that the 2 large diode got very hot along with a power transister.
i now have it in a box running fine off of a 9 volt battery. the reason it works ok is because of the large amount of voltage drop across the battery.