archive team group, computing team, computing team group, domain admins, domain users, email, livestream technicians, vision mixer (obs)
390
edits
Analog to DMX: Difference between revisions
m
no edit summary
(Combined with outboard page) |
mNo edit summary |
||
| (One intermediate revision by one other user not shown) | |||
| Line 1: | Line 1: | ||
{{Outofdate}} | {{Outofdate}} | ||
{{Idea}} | |||
==Does== | ==Does== | ||
* 6 channels (expandable to 12) | * 6 channels (expandable to 12) | ||
| Line 30: | Line 31: | ||
It gets power from the [[Analog to DMX]] box, and sends back different voltages, to control the [[Analog to DMX]] box, which then controls the DMX devices at the other end. | It gets power from the [[Analog to DMX]] box, and sends back different voltages, to control the [[Analog to DMX]] box, which then controls the DMX devices at the other end. | ||
==How== | === How === | ||
* ONE connection of DA15 | * ONE connection of DA15 | ||
** channels on pins 1 to 12 | ** channels on pins 1 to 12 | ||
| Line 37: | Line 38: | ||
** Gnd out on pin 15 | ** Gnd out on pin 15 | ||
==Why are there two grounds?== | === Why are there two grounds? === | ||
* The [[Analog to DMX]] box expects a reference Gnd from wherever it gets it's signal, this can be used, in conjunction with the AREF of some microcontrollers, to boost or cut the difference between 'reference' and signal (channels), so that was given a separate line. Usually, just leaving this alone or common (i.e. pins 14 and 15 bridged) is fine - it's main reason for existance is to be used as part of a compensator for long cable runs making voltage drops. | * The [[Analog to DMX]] box expects a reference Gnd from wherever it gets it's signal, this can be used, in conjunction with the AREF of some microcontrollers, to boost or cut the difference between 'reference' and signal (channels), so that was given a separate line. Usually, just leaving this alone or common (i.e. pins 14 and 15 bridged) is fine - it's main reason for existance is to be used as part of a compensator for long cable runs making voltage drops. | ||
* The [[Analog to DMX]] also sends 0v ground out to it's controlling devices, so they can operate - rather than being boxes of variable resistors. | * The [[Analog to DMX]] also sends 0v ground out to it's controlling devices, so they can operate - rather than being boxes of variable resistors. | ||
*Compensation happens at the slave end. Doing it at the control end risks someone coming along sometime in the future, and splitting the channels off the lines - in a worst-case scenario, they then compensate for long lines, something gets more than 10v without expecting it... | *Compensation happens at the slave end. Doing it at the control end risks someone coming along sometime in the future, and splitting the channels off the lines - in a worst-case scenario, they then compensate for long lines, something gets more than 10v without expecting it... | ||
[[Category:Lighting]] | [[Category:Lighting]] | ||
[[Category:Equipment]] | [[Category:Equipment]] | ||