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Anonymous Poster

Star Lighting

12/18/2010 2:37 AM

Hai elders, i am making astable multivibrator circuit to switch on and off 2 incandescent bulbs(40w) powered from 230V supply with relays. Does it work without any problem. Any suggestions?
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Paulusgnome
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Location: Christchurch, New Zealand
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#1

Re: Star Lighting

12/18/2010 1:55 PM

Yes, two suggestions :

1) Make sure that diodes are connected across the relay coils to snuff out the flyback surges when they are turned off;

2) Limit your switching frequency to something that the relays can comfortably cope with.

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Anonymous Poster
#2
In reply to #1

Re: Star Lighting

12/19/2010 10:17 AM

i hope i should connect the diode parallel to relay in reverse bias to do that stuff.

please give a sign.
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Anonymous Poster
#3
In reply to #1

Re: Star Lighting

12/23/2010 2:14 AM

success......yes it worked like charm.

connecting diode with a relay is new stuff for me and i changed the frequency replacing 10uF C with a 47uF.

i got 12V relay instead of 6V but when i checked 12V coil works for 6V also.The relay sound is a bit awkward....never mind.

merry Christmas Paulusgnome
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Paulusgnome
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New Zealand - Member - Kiwi

Join Date: Oct 2007
Location: Christchurch, New Zealand
Posts: 328
Good Answers: 29
#4
In reply to #3

Re: Star Lighting

12/23/2010 3:19 AM

I'm pleased it worked ok for you.

Merry Christmas.

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