Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi all.
I am working on replacing some lighting in my home with LEDs, and have found some high quality flexible LED strips, that I want to use for under cabinet lighting in the kitchen.
The strips are rated 24V, and about 10W/m. The 24V design is achieved by having groups consisting of a...
If you need only 50-200Hz PWM this can easily be implemented in software. What PWM resolution are you looking for?
At this PWM frequency I am thinking about LED control. I have done 8 channels with a pseudo-logarithmic PWM signal (equivalent to ~13 bits resolution) on an ATtiny2313. PWM freq...
Thank you all for the replies.
I have seen a design that uses the common mode choke first, and a TVS afterwards. This way the common mode choke actually helps reduce the surge pulse before it reaches the TVS. Is this a good idea, or are there caveats?
Also, for this to be effective, I suppose...
I have made a simple test with a connector with magnetics (Tyco 6605759-1), soldered directly to a length of CAT-5 cable with an RJ45 at the other end. This seems to work fine.
At this point I have left the center tabs of the isolation transformers floating, but I suppose these should be...
Thanks for the replies.
I hadn't thought about the voltage present during the surge. My intention is to use a National Simple-Switcher to build the 5V 4A power supply. Many of these have a maximum input voltage rating of 42V. The external DC supply will be 12V or 24V, but allowing a slightly...
The transmitter is the correct wavelength for the receiver (940nm).
The modulation should be 38kHz.
The two components you have shown are pretty standard for IR remotes, but you will need some intelligence to send and receive.
Have you planned how to add the intelligence to the system? Will...
I have found some suggestions of surgectors, but I have trouble determining when to use surgectors, varistors and or TVS diodes.
Also, it seems I should add a fuse (high current rating slo-blow type) before the varistor, since if it fails, it will short circuit. Any comments on that (I suppose...
Hello All,
I have a design where an embedded computer is put inside a case. The CPU board has an Ethernet port with integrated magnetics.
I need to run a length of cable (CAT-5) from the CPU board to an interface board that connects to the outside. In order to avoid EMI problems with the cable...
Hello All,
I am designing a product which will take a DC supply input (10-40V), powering a buck-converter with 5V 4A output. The product will be powered from externally (probably from a 24V switch mode), but in some installations, the DC power cable could be fairly long, so I need to design the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
