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Usb rechargeable pen inside?

Joined
Dec 2, 2008
Messages
317
Points
18
Hi guys

Wonder if anyone dismanteled laser pen that has battery built in?

Host looks nice so i would like to not damage it, also if possible to save the driver.

Is there aything that makes it tricky to dissasemble, if you have exeperience with those.. ?20230112_121920.jpg
 



Joined
Dec 2, 2008
Messages
317
Points
18
so i received this laser pen with battery inside..

it is giving 90mA, probably could be increased by changing that R1 resistor to 0.5R or even less.. will try..

anyway kind of nice insides. easy to extract things for your project..

one thing but shocked me.. last time i ordered pen laser was 10years ago.. it used to have some weight to it.. now it feels like its from paper..




 
Joined
Sep 16, 2007
Messages
3,581
Points
113
one thing but shocked me.. last time i ordered pen laser was 10years ago.. it used to have some weight to it.. now it feels like its from paper..
The housing used to be made from brass. Likely the new models are made from some kind of cheap, lightweight alloy.
I like the idea of USB rechargeable lasers. I've built one using a USB charging circuit from Adafruit. They use miniUSB or USB-C which is more convenient for me. The problem is that the size of the Adafruit PCB is too large for a compact laser, like a pen. They make smaller LiPo charging circuits but those appear to function only as a charger and don't have connections to wire a device on the battery output.

Is the charging circuit of this laser integrated into the laser diode driver or is it separate? It appears to be integrated.
 
Joined
Dec 2, 2008
Messages
317
Points
18
It is integrated. If you want other shoots just let me know. I still have it in the draver till i am waiting for the diode to be delivered. (China) 🤭🤭

its nice driver. 90mA stock. Replacing or adding resistor in parallel can make it more powerful. zenodilodon on youtube modified those drivers up to 1w.. i like to double stock mA. but obviously they are capable..


So for 8eur we have host.
Driver.
Battery is obviously trash, i would say 150mah max. but still. If it powers my build for an hour. Or just half. Its not that bad.
 
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