WikiSysop: Created page with "The final 1W 445nm laser in operation. Initial whiteboard plan for the laser using a Dorcy host. [..."

2015-08-07T00:40:27Z

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[[File:1W_445nm.jpg|thumb|right|The final 1W 445nm laser in operation.]]
[[File:445whiteboardplan.jpg|thumb|right|Initial whiteboard plan for the laser using a Dorcy host.]]
[[File:Dorcy assembly inventor.png|thumb|right|Autodesk Inventor model of the Dorcy host.]]
[[File:Versadrive-proto_Overshoot.PNG|thumb|right|Current overshoot measured on the Versadrive prototype board. It measures at 240mA (37.5% of full value) for 70uS.]]
[[File:Versadrive-proto_Ripple.PNG|thumb|right|Current ripple of the Versadrive prototype measures at 92mA max (14.4% of full value).]]

This is a project to create a 1 watt 445nm laser, using a diode from a Casio XJ-A140 projector in an Aurora 18650 host.

==Project Status and Updates==
* '''6.21.2010'''
** Initial plan drawn up on whiteboard
** Dorcy main body segment modeled in [http://usa.autodesk.com/adsk/servlet/pc/index?siteID=123112&id=13717655 Autodesk Inventor]
* '''6.23.2010'''
** Dorcy flashlight button segment modeled in Autodesk Inventor
** Dorcy flashlight assembly created in Autodesk Inventor
* '''7.6.2010'''
** Class 4 warning sticker made and ordered from [http://www.zazzle.com/445nm_1w_laser_warning_sticker-217258597865298593 Zazzle]
* '''7.8.2010'''
** Plan changed, decided to use a much smaller 18650 host
** Initial plan for new driver started
** ATtiny24 selected as controlling MCU, for size and I/O requirements
* '''7.9.2010'''
** PCB for driver started, found feasible
** Design for driver started in WEBENCH online tools using LM3410
** Multiple power modes tested using Op-Amp MOSFET driver
* '''7.11.2010'''
** Schematics and part selection complete, PCB routing begun
* '''7.14.2010'''
** Routing complete, part orders selected for [http://www.digikey.com/ Digikey] and [http://www.mouser.com/ Mouser]
* '''7.17.2010'''
** Prototype PCB routed, coding begun
* '''7.23.2010'''
** LM3410 samples received
** Prototype built using sample IC, SB350 diode, 1.5uH inductor (pulled from Dell motherboard), and 9.5/18uF ceramic capacitors
** Limited testing done at operating point of ~600mA output and ~4V battery voltage, LM3410 IC dissipates significant power, output appears to be clean with minimal overshoot during startup and no inductive spike at shutdown.
* '''7.25.2010'''
** Testing done at ~300mA with probe set to 10x, ringing and current ripple around 50-80% of full scale
** Versadrive project abandoned due to poor/unsafe performance
** Micro BoostDrive ordered
* '''7.31.2010'''
** Aixiz module and Micro BoostDrive received
** Laser assembled, initial testing done, on-hand batteries found insufficient at drive current of 1200mA
** AW 18650 battery ordered from [http://www.lighthound.com/AW-18650-Protected-2600-mAh-Rechargeable-Lithium-Battery--New-Version_p_3125.html Lighthound]
* '''8.7.2010'''
** Heatsink cut to size and attached to Micro BoostDrive to prevent overheating, found semi-effective
* '''8.11.2010'''
** Micro FlexDrive v5 ordered to provide greater current output
* '''8.12.2010'''
** Micro FlexDrive v5 order cancelled due to no stock
* '''1.7.2011'''
** Power decreased on Micro BoostDrive to reduce heat, continuous runtime increased to ~1 minute, 29 seconds, still capable of igniting cardboard

==Videos==
<HTML5video type="youtube" width="400" height="300" autoplay="false">nkSeNWYN5u8</HTML5video>

==Project Cost Breakdown==
{| border="1"
|style="text-align:center;" |'''Component'''
|style="text-align:center;" |'''Cost'''
|style="text-align:center;" |'''Source'''
|style="text-align:center;" |'''Status'''
|- style="color:navy;"

|445nm1W XJ-A140 Diode
|style="text-align:right;" |$38.50
|[http://laserpointerforums.com/f65/445nm-lasers-arrays-550-diodes-35-a-51438.html Group Buy - kiyoukan]
|Alive, in use
|-

|Aurora SH-032 18650 Host
|style="text-align:right;" |$21.62
|Dealextreme
|In use
|-

|Aixiz Module
|style="text-align:right;" |$3.39
|HighTechDealz
|In use
|-

|Custom Copper Heatsink for Aurora Host
|style="text-align:right;" |$40.00
|[http://laserpointerforums.com/f64/fs-stainless-steel-18650-kit-polished-perfect-445-a-52159.html jayrob]
|In use
|-

|Aixiz 445nm Glass Lens
|style="text-align:right;" |$11.00
|jayrob
|In use
|-

|AW 2600mAh 18650 Protected Li-Ion Battery
|style="text-align:right;" |$18.78
|[http://www.lighthound.com/AW-18650-Protected-2600-mAh-Rechargeable-Lithium-Battery--New-Version_p_3125.html Lighthound]
|In use
|-

|Micro BoostDrive
|style="text-align:right;" |$26.00
|[http://hacylon.case.edu/ebay/laser_diode/Micro_BoostDrive.php Micro BoostDrive]
|Alive, in use
|- style="color:red;"

|'''Total Price'''
|style="text-align:right;" |'''$159.29'''
|
|Price final
|-

|}

445nm 1W - Revision history

WikiSysop: Created page with "The final 1W 445nm laser in operation. Initial whiteboard plan for the laser using a Dorcy host. [..."