- Joined
- May 15, 2012
- Messages
- 320
- Points
- 28
I bought this 405nm laser from Techhood to see if it was a good deal. It actually was, despite only emitting 300mw instead of 500. So I cranked up the amperage! It made a pop and a smoke. Both the diver and diode were dead.
I bought a PL450B form marcuspeh and stuck it in there. I actually almost broke the diode by pushing it in too far, but thankfully it just dropped right out the front with a lot of forceful shaking. I applied thermal paste to the collimator module.
I had an ebay driver for 405's running at 220mA from the 5.5v supply. Both the leads from the fan and from the power supply wire are soldered together in pairs onto the input pads on the driver, so both the laser and fan turn on when it is plugged in. The power supply wire is just stuffed into the cylindrical driver cavity in the module and held there by friction from screwing the fan on tight.
After 10 minutes, the laser shows signs that the components on the driver are getting kinda hot. That's the same behavior it had when it was a 405nm laser. Not sure, but the fan appears to have a thermistor on it to regulate speed better.
pardon my bedspread
Looking at the beam quality, the lens looks like it's made of plastic; just a hunch. 160mW from 220mA does sound pretty bad. It looks like more of a cyan to me than my 80mw 450nm pen from Laserlands did, and that's probably because this unit is receiving twice the current (455nm-460nm??). The only thing I hate about this build is that the lens/diode appear to be very slightly off center, and the beam wobbles when focusing.
Video demo:
I bought a PL450B form marcuspeh and stuck it in there. I actually almost broke the diode by pushing it in too far, but thankfully it just dropped right out the front with a lot of forceful shaking. I applied thermal paste to the collimator module.
I had an ebay driver for 405's running at 220mA from the 5.5v supply. Both the leads from the fan and from the power supply wire are soldered together in pairs onto the input pads on the driver, so both the laser and fan turn on when it is plugged in. The power supply wire is just stuffed into the cylindrical driver cavity in the module and held there by friction from screwing the fan on tight.
After 10 minutes, the laser shows signs that the components on the driver are getting kinda hot. That's the same behavior it had when it was a 405nm laser. Not sure, but the fan appears to have a thermistor on it to regulate speed better.
pardon my bedspread
Looking at the beam quality, the lens looks like it's made of plastic; just a hunch. 160mW from 220mA does sound pretty bad. It looks like more of a cyan to me than my 80mw 450nm pen from Laserlands did, and that's probably because this unit is receiving twice the current (455nm-460nm??). The only thing I hate about this build is that the lens/diode appear to be very slightly off center, and the beam wobbles when focusing.
Video demo:
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