dr_lava said:
MM, congrats. another 'newbie' who's self-teaching and knows what he's doing. Just a note: 380 mA is a lot of current, I'd add ceramique or other heatsink grease to the diode and to the sides of the rearmost crystal if I were you. Also, you may want to follow a duty cycle. If you observe the beam getting dimmer on a good set of batteries, immediately turn it off for a while.
To be honest, I'm not self-teaching, I'm a teacher ... about electronic. And with this excellent Corona's scheme...the hard job was done.
:goodjob: Yes, it's a lot : beyond the 410 mA limit, the efficiency
decreases !!! => This tuning is for
intermittentuse
only.
My first mod was
much more prudent and still simpler : only shorted R102 by a strand of copper wire. Then tuned the pot until max current response. So the original current limiter was still doing its job between 250 and 300ma (I don't remember well alas) and actually, from the
practical point of view, it was sufficient and secure ! I estimated (green LED) power around 8 mW.
It's
quite enough for astro conferencing or as a telescope pointer.
But I'm haunted by the "always-more"
daemon, then ...
Does anybody achieved optical collimation ? (this daemon ...
...) I mean with this lightvision model.