Questions tagged [dmx]

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49 views

AVR DMX Transmitter outputs constant squarewave, not the form of a DMX packet

I'm using an ATMEGA328, with an external 20MHz crystal and fuses set by avrdude as -U lfuse:w:0x46:m -U hfuse:w:0xdf:m. I want to send DMX with it. Using the code ...
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1answer
55 views

Infineon DAVE v4.2.2. XMC1200 Boot Kit 4-Channel DMX Issue

I am using Infineon Dave v4.2.2. to program the XMC1200 boot kit with colour LED card to read a DMX input signal using a rotary dial. For those that don' know, Dave uses a simple UI with "apps" that ...
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2answers
138 views

DMX Control - 50W COB LED

I have a DIY project, with the aim of building an (LED-based) stage/theatre light from scratch. One of the challenges I've hit with this is getting DMX control to dim the LED. I spent some time ...
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1answer
69 views

DMX receiver 40V signal

I am creating a DMX receiver circuit. The dmx that is received from a controller (USB DMX dongle) is converted via a transceiver (SN75176BP) to a signal which can be understood by an ATMEGA328P. I ...
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1answer
441 views

How to make a circuit for DMX splitter notification LEDs?

I am trying to make a DMX splitter. Everything works now, but it would be somewhat useful to have notification LEDs, like in the example below. For the input I could use one LED, which I either ...
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1answer
503 views

MAX487CPA/SN75176BP RS485 IC gets too warm (in DMX Splitter circuit)

Brief I built part of the scheme below (input K2/IC5, optocoupler IC9 and output IC6/K3). IC9 is overheating when I connect LED pars to K3, because voltage is flowing back into pin 6/7. If I connect ...
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2answers
81 views

DMX chassis(?) pin?

I want to recreate this circuit (only show a small relevant portion): And my XLR plug for input (K2) looks like this: I found a reference how to connect K2, +, - and GND to the correct pins of the ...
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1answer
220 views

UART Synchronization After Break

With the assumption that not all UART are create equal and that documentation in general is not sufficient to answer this question, I have to ask how can I tell which UARTs (or generally asynchronous ...
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1answer
3k views

How can I reuse a crowdled bracelet?

I have been to an event last night, where I some wristbands produced by the Crowdled company (see links at the end). Material of one band: 3 colored leds (2 in total) and a button. Runs on battery. ...
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1answer
213 views

12V DC DMX LED Controller needs to be reduced to 5V

I need a bit of help for a lighting project I am undertaking. I have a couple of 12 volt DMX LED controllers driving various zones in a bathroom with LED strip. I want to replace the controlbox for ...
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1answer
42 views

Decoder with many output combination

Is there anyone there that has knowledge if such IC exist? i search in the internet for years like on distributors etc but somehow I can't see any (maybe i don't know the right term or keyword for it ...
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1answer
58 views

Problem with chaining many small DMX cables

In DMX cables (used for lights), all cables are daisy-chained. In my band we are normally on small stages, but occasionaly on bigger. To prevent buying very long cables, I wonder if it is a good ...