Recent content by presse55

Good points paul1598419 - let me see about working those tweaks in! Ron

Hello, I got my project working as intended. increased input to LM317 to 7V output of LM317 is 4V decreased Rb (base of NPN transistor) to 500 ohms Pressing the button activates the laser. I measured 310 mA, and a drop of 3.6V across the laser. This is good enough for now, though I read...

It's working - removed the pot, increased voltage input on LM317. Thanks a million for all your feedback. My lab is in the basement of our home - I've read up quite a bit, and take recommended precautions seriously. Aircraft are safe, this former pilot is glad to report. I'll post a corrected...

The end objective is to mount the bare module on the scope, and to have an Arduino IO pin, away from the laser/scope, turn the laser on/off. Hence the transistor. So for now, till the Arduino side is done, I'm working with a physical switch to turn the transistor on/off. As for your second...

Hello group, Totally new to the forum, and have limited electronics & laser competence; thanks in advance for reading this thread! I'm an amateur astronomer, and wish to modify a cheap green laser pointer to help orient my telescope more conveniently. The mods involve: removing button...