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hello nice to meet you! I wanted to know how do I set up to 900mA flexdrives. I can see some pictures? I'm doing lostesso your project. you're great!
DTR Hello! congratulations on your masterpiece.
I wanted to ask, if I put 3 batteries in parallel 18650 changing the battery holder and the same?
between the drive and just put dissiptore heat glue thermal or put something else to do Anhée touch the contacts.To run dual drivers you just need to hook them up in parallel and add up their combined current. I will test them individually then with them wired together. You may loose 1-2mA when reading their combined output. It has been said that it does not matter but I like to set the drivers as close to the same mA as possible.
When I say parallel I mean both wire the corresponding wires from the driver together. IE both positive output wire from the driver will go to the positive diode pin and so on for the rest. Now you can heatsink the drivers or not. If you are running say 900mA each they can go for about 5-10 minutes before overheating. But as the driver heats up there will be a slight drop in power and if you sink them you can run them continuously and without this power drop. Shoot me a PM if you have any other questions.
Morgan also did a nice thread on his dual microboost build but the flexdrive is easier to sink and is a little more efficient with current when boosting the voltage. Hope this helps.:beer:
http://laserpointerforums.com/f65/dual-microboost-driven-skyray-build-1-8a-55628.html#post784286
between the drive and just put dissiptore heat glue thermal or put something else to do Anhée touch the contacts.
To run dual drivers you just need to hook them up in parallel and add up their combined current. I will test them individually then with them wired together. You may loose 1-2mA when reading their combined output. It has been said that it does not matter but I like to set the drivers as close to the same mA as possible.
When I say parallel I mean both wire the corresponding wires from the driver together. IE both positive output wire from the driver will go to the positive diode pin and so on for the rest. Now you can heatsink the drivers or not. If you are running say 900mA each they can go for about 5-10 minutes before overheating. But as the driver heats up there will be a slight drop in power and if you sink them you can run them continuously and without this power drop. Shoot me a PM if you have any other questions.
Morgan also did a nice thread on his dual microboost build but the flexdrive is easier to sink and is a little more efficient with current when boosting the voltage. Hope this helps.:beer:
http://laserpointerforums.com/f65/dual-microboost-driven-skyray-build-1-8a-55628.html#post784286
Thank you for the quick reply. This answered nearly all of my questions. I understand the need for heatsinking these drivers. I was the first to point out that the flickering from the drivers was related to the thermal protection of these drivers kicking in. (not many people believed me tho)
So in theory if you were to take one driver set at 900ma and one driver set at 500ma, you would get 1400ma. Or if both were set to max at 1.2A each, you'd combine to a total of 2.4A I would imagine this would dramatically reduce the amount of runtime You would get off a single battery (regardless of size) since it's drawing a lot more.
Could you use 3 in parallel as well? NVM I answered my own question.. This is why the AMC7135 can be combined with MULTIPLE AMC7135 chips to increase the current up and up.
Yes I just use thermal adhesive between the driver and the heatsink.:beer: