Here is a schematic of a DMX / Power Splitter Board that I made for this years show. With one exception, it works as expected.
A problem is noticed with the following setup PC --> DMX Dongle --> Splitter Board --> DMX 3 Channel RGB Flood from HolidayCoro
When the DMX dongle is actively sending data before power is applied to the splitter board, the 485 transceiver will not properly translate the signal. After that, I can disconnect and reconnect the DMX line and everything works fine. I have isolated the behavior to the SN65LBC169 IC.
I assume I am missing something simple...
So far, I have only had a chance to test it with the 3 Channel DMX module, could this be a behavior related to power on of this module. (Light is being powered from the same power supply which is powering the Splitter).
Thanks in advance.