DMX optoisolator

DMX optoisolator

Post by E. Lee Dic » Sun, 28 Aug 2005 14:05:53

Just lost a stack of dimmer packs. Opened them up: No isolation at all.

So, I'm going to build Kristof Nys' isoltor/booster, but there's no
isolation on the outputs. I'll be adding that.

The question is: He's got the output grounds all tied together. I see that
is a current path.

As DMX is balanced, is there any real reason I should connect Pin1?

E. Lee *** inson
Entertainment Design and Technology

DMX optoisolator

Post by E. Lee Dic » Sun, 28 Aug 2005 14:15:08

Wrong group... sorry!


DMX optoisolator

Post by MFHul » Wed, 31 Aug 2005 03:09:53

On Mon, 29 Aug 2005 04:21:48 -0000, Eric N Johnson < XXXX@XXXXX.COM >

Yup ;-)

I just bought some ISO485P's (isolated RS-485 drivers) and DCP010505BP's
(small 5vdc-5vdc isolated power supplies) on eBay. The ISO485P is a 14-pin
device with the middle 10 pins unused. So an 8-pin 75176-type device can be
accommodated on the PCB under its footprint using the same 14-pin socket
for either device family (either/or, of course).

... Marc