I want to make the following DMX Splitter:
Credits by J. Mack, see Full article: DMX Splitter
Changes made by me (with help of Maple, Transistor and many others, thanks for that):
- Four instead of three output channels
- Power led
- Signal led
- 5 separate DC/AC converters
- Separate 220 ohm resistors per output
- Temperature fuse and varistor
- TVS diodes
The circuit I came up with is:
- Light blue circles are header pins
- Black dots are terminal boxes
- There are 6 PCBs
- The bottom middle PCB is overlapping slightly. On the left bottom and right bottom PCB there are two black squares, these are broken off to fit the enclosure.
- The dark areas on the other two left PCBs are to make sure the fuses can be replaced if necessary (to have a gap to the fuse boxes)
I have a bunch of questions (hopefully I can ask them in one question since they are all related to the circuit).
- In the left bottom PCB there is a QuickBlow fuse, but in the original link it is a SlowBlow. I don't have these; will this be a problem?
- Would the HiLink HLK-PM01's have enough distance between each other?
- I'm putting everything in one enclosure. I know officially a double enclosure should be used, however, there is really no space for it. And I intend to put the AC220/240V signals UNDER the bottom PCB which will be screwed tightly, so there is no possible way to touch 220/240V. Is this 'acceptable'? I'm intending to use the device on stages with my music bands. The device will be under my keyboards stand, reasonably safe.
- The TVS types are 1.5KE18CA DO-201AD 1.5KE18 Bidirectional TVS diodes. Are these ok? I checked them, but I couldn't check the real usage.
- I tried to lay the wires as good as possible, although several overlap (some I can route a bit better not crossing an IC, but it cluttered up the picture more to use only straight lines.
- Is there anything I didn't think of (regarding safety/functionality?)