Recent content by RustyH

On R25, the range is 4. 7k to 27k, is there much affect in the circuit at min and max of that range?

Hi Alan, I'm not planning on dimming them LEDs, just run then at a constant brightness. Will that help? The VTAC one is none dimmable CPC sell the same one for less - VTAC 6004

Thank you for all the help again, very very informative and appreciated. The 2 LEDs will actually be 2 Seperate Lights, each in there own housing. So each housing will only need to dissipate the heat of 1 LED

Sorry, My apologies, Yes, I should have said, was thinking those LED drivers would replace the 36V PSU which is a 240v plug in PSU. These will indeed be mounted in a Pind application

Those Lights look brilliant I may struggle to get a PCB inside the LED Aluminium Housing, so I may have to mount that type of protection circuit externally. Shouldn't be a problem. Its likely, given it will be water cooled by a large volume of water that will probably never reach above 30...

Would it be safer / easier if I drove each LED via one of these CPC LED driver RS Mean Well LED Driver

Thank you ever so much for your replies. These will be in sealed in aluminium housings and used underwater, so providing the thermal couple between chip and housing (heatsink) is good, and given the thermal mass of the water (which will never reach above 30 degrees C, and a volume of around...

Thank you I will eventually want to drive two of these LEDs, so do I need to test for 2.4A, and therefore 15ohm load? Am I also right in thinking it's the "Maximum Drive Current" value you use from the datasheet? Cree Datasheet Link

Hello, Just after some help if possible, Im making a small project circuit which uses a Cree CXA25 LED. 36v, 1.2A. I am supplying the power from a 36v power supply that I had spare, although its not regulated. I was wondering what circuit should I put in place to protect the LED. I read that...

Sorry if this has been covered already. I'm helping with a semi professional early teenage football team, and I was looking at possibly buying a kit of GPS trackers for field position monitoring and recording. Unfortunately, the cost of these system is way way beyond my budget. I was therefore...

Morning All, I'm going to be using some IR sensors to input in to an 18M2. These are pre built devices which output around 3v when activated. What type of circuit do I need to use such an input device? Do I need any drop down resistors or anything? Thanks Russ

Apologies for the off topic post, but I know there some very knowlegable people in this forum that might know the answer. Do any of you know much about CMOS sensor ICs. I am having to do some thermal calculation on a system that has one of this implimented. Its a high end CMOS sensor, that...

Having recently had my shed broken in to, I am on a mission to secure it the best way I can. Obviously one is a shed alarm, however i want to modify this so that if the alarm is triggered, a small alarms in my bedroom will also go off to alert me of the activity. The shed is right up the top of...

Good day to all, Im looking to design a rig that allows me text the thermal capabilities of materials (mainly metals). I,d like to accurately control the heat source so I can calculate the power consumption for heat calculations. I would also need to measure the heatsource. I wounding if...

Thanks for the replies guys, From what I can see, the resistor links between the transformer (I believe its a transformer!), and the large Cap in the picture. A few other bits are connected to the tracks going to the resistor as well, These include the large white ceramic resistor (10w), the...