Thanks guys for your help so far.
I have built a couple LM317 based drivers, and have a couple units working.
Unlike most here, this setup is not for a focused burning, but rather for a wide beam night illumination hunting system.IR all the way.
you guys have me so worried about the dangers of lasers, I won't even turn it on in the house..gotta go outside and point at the field..
Ha,ha,ha...Yes I know big dummy..no goggles..but I'm careful..all testing done at lower power with a 5mw green..then outside.
I agree, I'm afraid of these things.
Anyhow, I read this on this board..and figured I would ask about it.
(You take the op amp, and use it to amplify the voltage to 1.25, so the regulator *thinks* that it's 1.25 volts, and will regulate the current as necessary. It would keep it at 250 mA, but there's a LOT less power dropped (only 6 mW!) across the resistor as a result. It makes it MUCH more efficient.
This method can be applied to any regulator, switching, or linear. You can make the famous LM317 work a lot better using this... instead of dropping 3 volts by default, it'll only drop around 1.5-2 volts instead! (basically, you won't need as much "default" voltage to get it regulating right)
Can anyone elaborate on this..how to wire it, opamp part# ect...drawing
FYI..I'm also making a Lardy/Marky light..for spotting..the IR laser is the shooter
Thanks...Brian
I have built a couple LM317 based drivers, and have a couple units working.
Unlike most here, this setup is not for a focused burning, but rather for a wide beam night illumination hunting system.IR all the way.
you guys have me so worried about the dangers of lasers, I won't even turn it on in the house..gotta go outside and point at the field..
Ha,ha,ha...Yes I know big dummy..no goggles..but I'm careful..all testing done at lower power with a 5mw green..then outside.
I agree, I'm afraid of these things.
Anyhow, I read this on this board..and figured I would ask about it.
(You take the op amp, and use it to amplify the voltage to 1.25, so the regulator *thinks* that it's 1.25 volts, and will regulate the current as necessary. It would keep it at 250 mA, but there's a LOT less power dropped (only 6 mW!) across the resistor as a result. It makes it MUCH more efficient.
This method can be applied to any regulator, switching, or linear. You can make the famous LM317 work a lot better using this... instead of dropping 3 volts by default, it'll only drop around 1.5-2 volts instead! (basically, you won't need as much "default" voltage to get it regulating right)
Can anyone elaborate on this..how to wire it, opamp part# ect...drawing
FYI..I'm also making a Lardy/Marky light..for spotting..the IR laser is the shooter
Thanks...Brian
Last edited: