Laserprojector en: Unterschied zwischen den Versionen
Siro (Diskussion | Beiträge) KKeine Bearbeitungszusammenfassung |
Siro (Diskussion | Beiträge) K (updated) |
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<b>Concept :</B> Build a laserprojector as easy as possible<br /> | <b>Concept :</B> Build a laserprojector as easy as possible<br /> | ||
< | == Übersicht == | ||
<b>Max. Resolution</b>:256x256<br> | |||
<b>Refreshrate</b>:30Hz<br> | |||
<b>Colors</b>:1 (blau)<br> | |||
<b>Colordepth</b>: 256 (8-bit)<br> | |||
<b>Interfaces</b>: RS232, ??<br> | |||
<b>Reflectionunits</b>:2x Mirrorwheels, Asyncronmotor + DC-motor<br> | |||
<b>used Controllers</b>:ATmega169 + STM3210xx<br> | |||
== Basic Idea == | |||
An Atmega controlls 2 fast motors, checks keyboard input,controls GLCD and Power-Supply.<br> | An Atmega controlls 2 fast motors, checks keyboard input,controls GLCD and Power-Supply.<br> | ||
On each motor is a mirror-disk spinning to | On each motor is a mirror-disk spinning to deflect the laserlight.The first mirror deflects the light only in the horizontal layer, the second one deflects light on the vertical layer. I'm going to modulate the laser diode to draw images.<br /> | ||
< | == Syncronisationunit:== | ||
<b>obsolete</b><br> | |||
Detects position of the laserbeam | Detects position of the laserbeam | ||
[[http://www.das-labor.org/trac/export/4063/microcontroller/src-atmel/laserproj/daily-build/eagle/ eagle Dateien im labor-svn]]<br> | [[http://www.das-labor.org/trac/export/4063/microcontroller/src-atmel/laserproj/daily-build/eagle/ eagle Dateien im labor-svn]]<br> | ||
| Zeile 50: | Zeile 51: | ||
Versorgungsspannung: 3,7 bis 15 Volt (empfohlen 5 bis 12 Volt). | Versorgungsspannung: 3,7 bis 15 Volt (empfohlen 5 bis 12 Volt). | ||
</i> | </i> | ||
== Syncsensor == | |||
Two small IR-LEDs are emitting light onto the spinning mirrors. The deflected light changes the current at the "fototransistor". | Two small IR-LEDs are emitting light onto the spinning mirrors. The deflected light changes the current at the "fototransistor". | ||
< | == Saftyunit == | ||
<b>obsolete</b><br> | |||
The Saftyunit has to detect, that both mirrors are spinning fast enough, to prevent damage to anything in the laserbeam. The saftyunit cuts the laser power as soon as anything shows abnormal behavior.<b>This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !</b> | The Saftyunit has to detect, that both mirrors are spinning fast enough, to prevent damage to anything in the laserbeam. The saftyunit cuts the laser power as soon as anything shows abnormal behavior.<b>This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !</b> | ||
== Controlunit == | |||
Connected to the controlunit are GLCD, Keyboard, Horizontal-Motor, powersupply, i2C | Connected to the controlunit are GLCD, Keyboard, Horizontal-Motor, powersupply, i2C | ||
<gallery> | <gallery> | ||
| Zeile 63: | Zeile 65: | ||
</gallery> | </gallery> | ||
== Horizontal mirror == | |||
I received a "Laserunit" out of an Epson printer doing 24000 rpm with 7 mirroring sites. 24000*7/60 = 2800 deflections per second. | I received a "Laserunit" out of an Epson printer doing 24000 rpm with 7 mirroring sites. 24000*7/60 = 2800 deflections per second. | ||
<gallery> | <gallery> | ||
| Zeile 69: | Zeile 71: | ||
</gallery> | </gallery> | ||
== Lasersupplyunit == | |||
This circuit is able to regulate the current going trough the laserdiode. Its able to modulate the beam up to 1Mhz with a 0/3,3V input signal. The output is a rectangle modulated current with an adjustable offset and max. current. An OpAmp is missing in this circuit. | This circuit is able to regulate the current going trough the laserdiode. Its able to modulate the beam up to 1Mhz with a 0/3,3V input signal. The output is a rectangle modulated current with an adjustable offset and max. current. An OpAmp is missing in this circuit. | ||
| Zeile 76: | Zeile 78: | ||
</gallery> | </gallery> | ||
== Imageconversionunit == | |||
<b>TODO</b><br> | |||
<br> | <br> | ||
== Laserdiode == | |||
<b>WARNING !</b><br> | <b>WARNING !</b><br> | ||
<b>This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !</b><br> | <b>This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !</b><br> | ||
| Zeile 117: | Zeile 90: | ||
[http://www.insaneware.de/epages/61714203.sf/de_DE/?ObjectPath=/Shops/61714203/Products/445-1w 1000mW (1W) Laserdiode 445nm blue 5,6mm] | [http://www.insaneware.de/epages/61714203.sf/de_DE/?ObjectPath=/Shops/61714203/Products/445-1w 1000mW (1W) Laserdiode 445nm blue 5,6mm] | ||
== TODO == | |||
* Redoing the whole concept | * Redoing the whole concept | ||
* Design SMD boards | * Design SMD boards | ||
* Buy new motors, mirrors, laser,... | * Buy new motors, mirrors, laser,... | ||
== Links == | |||
[http://www.projektoren-datenbank.com/laser.htm Laser Projektoren] | [http://www.projektoren-datenbank.com/laser.htm Laser Projektoren] | ||
Version vom 30. Dezember 2010, 16:49 Uhr
| laserprojector Release status: experimental [box doku] | |
|---|---|
| |
| Description | projector using laser and 2 mirrors for deflection |
| Author(s) | siro |
| Last Version | 0.2 |
DIY Laser Projector
Concept : Build a laserprojector as easy as possible
Übersicht
Max. Resolution:256x256
Refreshrate:30Hz
Colors:1 (blau)
Colordepth: 256 (8-bit)
Interfaces: RS232, ??
Reflectionunits:2x Mirrorwheels, Asyncronmotor + DC-motor
used Controllers:ATmega169 + STM3210xx
Basic Idea
An Atmega controlls 2 fast motors, checks keyboard input,controls GLCD and Power-Supply.
On each motor is a mirror-disk spinning to deflect the laserlight.The first mirror deflects the light only in the horizontal layer, the second one deflects light on the vertical layer. I'm going to modulate the laser diode to draw images.
Syncronisationunit:
obsolete
Detects position of the laserbeam
[eagle Dateien im labor-svn]
Better use a impedanceconveter, instead of voltage divieder.
schematics of syncronisationunit
SMD-Board of syncronisationunit
Description
TODO Die LEDs leuchten auf den Spiegel, wodurch das reflektierte Licht auf die Photodioden fällt (nicht kritisch welche), wird differenziert, rauschgefiltert und verstärkt. Am Ausgang des OpAmp schneidet eine Diode die negative Spannung ab. Ist diese groß genug, schaltet der FET (BSS123) durch und zieht die Output Leitung auf Masse. Am anderen Ende der Leitung muss ein Pullup-Widerstand sein, der den Strom auf unter 100mA begrenzt. Versorgungsspannung: 3,7 bis 15 Volt (empfohlen 5 bis 12 Volt).
Syncsensor
Two small IR-LEDs are emitting light onto the spinning mirrors. The deflected light changes the current at the "fototransistor".
Saftyunit
obsolete
The Saftyunit has to detect, that both mirrors are spinning fast enough, to prevent damage to anything in the laserbeam. The saftyunit cuts the laser power as soon as anything shows abnormal behavior.This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !
Controlunit
Connected to the controlunit are GLCD, Keyboard, Horizontal-Motor, powersupply, i2C
schematics of Controlboard
layout of Controlboard
Horizontal mirror
I received a "Laserunit" out of an Epson printer doing 24000 rpm with 7 mirroring sites. 24000*7/60 = 2800 deflections per second.
Laserunit made by Epson
Lasersupplyunit
This circuit is able to regulate the current going trough the laserdiode. Its able to modulate the beam up to 1Mhz with a 0/3,3V input signal. The output is a rectangle modulated current with an adjustable offset and max. current. An OpAmp is missing in this circuit.
schematic of lasersupplyunit
Imageconversionunit
TODO
Laserdiode
WARNING !
This is a class 3 laser, able to burn wood/paper/flesh even in a few meters distance !
Wear security goggles !
I'm using this laser to project an image at a very big surfaces ! This prevents serious eye damage when looking at the projected point!
Do not look into the beam!
1000mW (1W) Laserdiode 445nm blue 5,6mm
TODO
- Redoing the whole concept
- Design SMD boards
- Buy new motors, mirrors, laser,...
Links
http://elm-chan.org/works/vlp/report_e.html
