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Teensy Driver?

mpwn

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I have a teensy microprogrammer board laying around. And was wondering would it be possible to use a Teensy as a laser driver? It has a ATMEGA32U4 chip on board if thats any help. I know this is a stupid question but was jsut wondering. :) You can buy one here PJRC Store

Specs below are from website






EDIT: I've looked at here doesn't really say anything http://laserpointerforums.com/f57/microchip-programmer-45498.html

Thanks
 
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chefla

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No, not just with the bare board. You can only source 20mA with a single port of the atmega. If you want to go for higher powered builds then you need to add some extra parts like a power FET. But theoretically, you could either replicate a boost/buck or linear driver. But this requires in depth knowledge and in the case of the buck/boost drivers a good scope to check the output and tune the circuit. As I said, it is not going to be easy but can be done if you are willing to read and study...
 

regalis

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Huh? :thinking:
this question is like:"Can i use my Core2Duo as a laserdriver?"
I'm pretty sure it is possible, but it seems to be a "little" overhead...don't you think? :D
 

Kmor2004

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As chefla said directly no, as regalis said its over the top, but you could and you possibly could make it into a Buck boost with adjustable current, note I said "COULD" it would take some engineering.
 

mpwn

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Thanks for checking it out , i too tgought it would be very hard, but just asked anyway :)


Thanks
 

Kmor2004

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Building a buck OR boost driver isn't hard, what IS hard about them is making sure you get teh current correct, at which point you end up having a set current. but if you just want to make a driver that can have an adjustable current usign the uC then look around I built one incorperated into a LPM/dummy load for testing, and someone else asked about using an arduino for a driver and schematics are given in that thread.
 




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