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Help needed: Relay

S

SFM-Ptgal

As soon as I get the 160 3mm leds I'll build an 230v/ac On AIr light.
I want to connect it to my Stereo 80.
I won't put 230V/ac into it.
I have a 10V/ac transformer connected on the feeding relay terminal of the console that lights a cluster of 4 blue leds, succesfuly.
I want to use a relay that with those 10v/ac triggers 230V/ac to feed the On Air light. Can anyone point me to a decent schematic/component/tech explanation how to achieve that?
 
You may want to double check the Stereo 80 manual. I believe it has a built in relay that will handle that...

Test123
 
regardless of how much voltage the S 80 WILL handle, you can alwys zap yourself when the front panel is open. Get a 10 volt relay (if this is the voltage you have available) and place the 230 v across the switched poles of the 10 v relay. keeps the voltage out of the baord and really no circuit to design.
 
here I am again...

ChiefEngineer said:
regardless of how much voltage the S 80 WILL handle, you can alwys zap yourself when the front panel is open. Get a 10 volt relay (if this is the voltage you have available) and place the 230 v across the switched poles of the 10 v relay. keeps the voltage out of the baord and really no circuit to design.
Click to expand...

The relays that were interfaced on the mic channels were these:

relay model N
Monostable semi-miniature relay, for D.C.
In compliance with CCTU07-01.
Internacional configuration.
Breakdowns of its contacts from 1 to 5 A (depending on version).
Several combinations of contacts: Co, CoP, Co2, Co2P, Co4.
Equipped with printed circuit sockets or weldings.
Complete line of accessories and chassis.
Bobbins from 1.5 to 90 V.

Seen here as model N

Id'like to use them for the ON AIR light but I'm afraid. It triggers with 9v dc but I have no idea if they can handle 230v... Can you help me on that?...

Pedro
 
I used a similar "ice cube" relay for my ON AIR light, but I decided to rewire the light to use 12v auto brake light bulbs.
A 12v, 2 amp transformer feeds two 2 clear brake lights when the mike is off.
Flipping the switch to power up the relay connects the mike, switches off the clear bulbs, powers up 2 red bulbs, and connects a resistor across the monitor speakers which lowers the output to about 1/2 level, to prevent feedback through the mike.

If you want to use 230 v AC, it "should" be OK. DC at 230 would very likely not be a good idea since opening the contacts might result in too much arcing when the contacts open. The printing press manufacturer I worked for used relays much like style N for switching
AC loads at 200v with no problems. (except in one case I remember, where arcing started in the relay socket, and the 24v control power for the relay got connected to the 200v power being switched, with thousands of dollars of equipment being toasted.)
Rewiring the on-air lamp for a lower voltage eliminates the possibility of getting the 230 into the console electronics.
You could always use the relay to turn on another slightly bigger relay with a 12v coil, and let THAT relay switch the 230 AC.
That is how we controlled heavier loads on the presses.
 
Finally got some thing and connected a light bulb to the MIC ON switch. A DC Power supply to the TB of the console feeds a relay when mic is on, the relay closes an ac circuit that lights on a bulb. The relay is one of those that the console's previous owner placed on mic 1 and 2 for remote control. Now I need a fancy lamp to complement the console ;D
 
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