boatdog357 Posted December 8, 2014 Share Posted December 8, 2014 I need 8 channels 6 volts and 8 channels 12 volts dc. this board would be perfect. 9-16 would be relays and the others would be leds. I am unable to find the heatsinks so I can mount it in a enclosure. are they going to be available still Link to comment Share on other sites More sharing options...
boatdog357 Posted December 8, 2014 Author Share Posted December 8, 2014 I have decided to to go with the cmd24D deluxe card but still no heatsinks to mount it. Link to comment Share on other sites More sharing options...
k6ccc Posted December 8, 2014 Share Posted December 8, 2014 You likely don't need the heatsinks.. The newer DC cards can handle 4 amps per channel without heat sinks. Link to comment Share on other sites More sharing options...
boatdog357 Posted December 9, 2014 Author Share Posted December 9, 2014 thanks for the advice jim. I will make me one out of scrap sheet aluminuim to mount it in a enclosure. that will save me about 30 bucks. Link to comment Share on other sites More sharing options...
Max-Paul Posted May 24, 2015 Share Posted May 24, 2015 Jim can you confirm what I am about to say. Boatdog, I believe that those metal tabs on the MOSFET transistors are not isolated. I think you will need to use a insulator kit for each of those transistors. part of the reason that you will not find LOR selling a heatsink / mounting bracket. Link to comment Share on other sites More sharing options...
k6ccc Posted May 24, 2015 Share Posted May 24, 2015 Max is correct. The metal heatsinks on the MOSFETs are electrically hot. If you are driving relays and LEDs you likely don't need the heat sinks. Measure the current of your loads. If you really need heat sinks, you will need insulated mounting kits for each MOSFET. I don't have heat sinks on any of my four DC boards. Link to comment Share on other sites More sharing options...
LOR Staff Posted May 25, 2015 Share Posted May 25, 2015 Correct, Jim and Max. If you tie those tabs together with a heat sink, you will short all of them out. Please read the user manual for the board. In there it explains what you need to do to add heat sinks if you REALLY need them. Hints: Non conductive heat sink grease, mica insulators, nylon screws and nuts. Link to comment Share on other sites More sharing options...
EmmienLightFan Posted May 26, 2015 Share Posted May 26, 2015 (edited) Why not get a DMX relay board instead of making one with an LOR controller that can do a lot more and therefore be used elsewhere for greater effect? You could save money, even when you factor in another LOR USB485 if you don't already have a DMX network, and then have more low voltage lights/RGB channels. Edited May 26, 2015 by EmmienLightFan Link to comment Share on other sites More sharing options...
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