WalterMo wrote:So let me recapitulate and correct me please: One output pin of the Atmega8 is used to switch your DealExtreme laser by means of an IRF540 FET to ground. And both have their own power supply with own transformers?
No, the laser right now is using the same power source asthe atmega. It is a 7805 ( not drawn in my diagram) but the laser has it's own diodes to bring the voltage down to about 3.5 V. The 7805 as you know can not supply the SSC P7 adequately.
WalterMo wrote:And what about the power LED Q5 in the modified projector? Was or could it already be controlled by the microcontroller? I remember we had talked about a constant current source with the LM317T.
I am still using the LM317T as a driver for the Q5 but I have not tried to switch it with my board. I was going to start right off with the P7 and it's driver http://www.dealextreme.com/details.dx/sku.20330
but after I purchased the driver it go some bad reviews: only puts out 2 A and maybe overheating and cuts the current. If this driver doesnt work out I have already at hand an LM350T and was thinking I could use that like the LM317T to drive the P7.
WalterMo wrote:And now you like to connect the new SSC P7 to the Atmega8.
I have taken a look on a German LED forum and found this values for it:
3.5V at 1.4A (385 lm)
4V at 2.8A (760 lm)
That means up to about 10W of heat must be conduct away!! Do you intend to use a „normal“ heatsink or better a Peltier element?
Do you want to use the same current driver as for the Q5 (a bit modified) to drive the new SSC P7 or will it come with an own driver? Then please give me a link to the site of driver and LED.
When we start talking about Watts I dont know how hot that is till I burn myself on it
I was hoping to use the same celeron heat sink. Maybe with a fan? The Q5 doesnt even make the heatsink warm. The only thing that gets hot with the Q5 is the LM317T and I was hoping to avoid that again by using the driver I mentioned above. the P7 I purchased is here: http://www.dealextreme.com/details.dx/sku.12721
It shows up as available but has been backordered for about 2 weeks now
WalterMo wrote:I think we will find a way to connect the new LED to the microcontroller. Care should be taken regarding the ground lines at this high currents. Anyway, using a relay will help in any case to separate the ground lines.
I agree that a relay would be the best solution and remembered you also mentioned that in PM. Would I need an optoisolator to prevent problems with the inductive load this creates? Since I am not really into the whole first enlightened pixel way of scanning anymore and since David tells my controller when to start through the COM feature, it knows everything it needs and there is no need to switch anything right now.
Thanks for all your help Walter
Okay now I have a new planeless test to show.
This was the angel also I scanned so long ago but now I rescan without planes and with texture grabs
. Here is the the results rendered in zbrush. I have not done any texture touchup so you can see some magenta triangles where I was too lazy to get all those angles.
WalterMo wrote:By the way: I am glad to see (at your dog statue) that the new DAVID version 2.3.4 now perfectly works for the fusion at the planeless scanning.
and now with color texture too
David really is an amazing piece of Software