SSR Resistor Placement

[eschnell]

All of the SSR designs I have seen have the resistor between the Opto and the Triac. Would you be able to hook up the resistor between the hot and pin 6 of the MOC3023 then have p4 going right to G on the triac(p3)?

[shocker]

on your layout u need another resistor on the control side to preserve the opto led

[eschnell]

yes, it's the basic design before the opto. the resistor going into the rj45 then to the controller

[shocker]

on my board i normaly put 2 ssr to control 1 duplex plug
and i put red led on the control side to see if the signal come

[eschnell]

full board design

[wjohn]

just my advice,

the Main Power track is too small, 60mils at 2 oz copper is good for 2 amps, the COOP designs have the main track at 140 mils so it can handle 4 amps, and any one TRIAC can take 2 amps.

if you dont spec 2 oz, the boards will be made in 1 oz copper. that will drag you back to 1 amp total (0.25 amp per channel). I think a US string is 0.3 amps, so you will start to heat up the PCB.

While you could beef up the tracks between the TRIACs (Pin #2), you would still have a hot spot on the Pad at #2 as you throttle the track from 140 back to 60 mils to pass thru the TRIAC .

I am sure it will work, as is, but there were reasons for the way Sean and I designed our boards as we did.

[eschnell]

Right after I place the order. I do not plan on more than one amp of power per channel, and they have 2oz copper on the boards. I am going to run tests with amps and heat when I get them, if i need it, i can put jumper wires between the triacs

[BillAd]

Eddie,

"i can put jumper wires between the triacs" - or just float a bead of solder down the entire trace.

Bill

[P. Short]

Bear in mind that the electrical conductivity of sn-pb solder is typically 1/10 that of copper.

--

Phil

[eschnell]

The boards have a soldermask, so i wouldent be able to put on a solder trace, correct?

[ben]

The boards have a soldermask, so i wouldent be able to put on a solder trace, correct?

scrape it away

[disneynut]

test test test