arking, relay sound
arking, relay sound
(OP)
Made a circuit board with dual opamp, and two voltage regulators. Has slots for microprocessor eval board to sit in. Before going further was testing the circuit( without putting the microprocessor board). Every time i connect the power there is arking at th contacts( for main power). I am not using relay or any other inductive component. Its not a high current cirucit dont understand the reason?





RE: arking, relay sound
RE: arking, relay sound
RE: arking, relay sound
You still didn't say whether the current drops down to a normal steady state value.
What if you remove your microprocessor circuit? Or the regulators? Just pare it down and find out where the current is going.
RE: arking, relay sound
Dan - Owner

http://www.Hi-TecDesigns.com
RE: arking, relay sound
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: arking, relay sound
I read somewhere that two capacitors 220n( i typed it wrong earlier as 22u) and 1u on the power supply removes the high frequency spike noise in the system, so I had put one.
I compared peak to peak mV on the ground plane using tecktronic oscilloscope. Interestingly putting the cap actually increased noise from 10 mV to 18 mV and also caused the spark on the input. Removing the cap has fixed the problem of sparking and reduced the noise in ground.
RE: arking, relay sound
<sigh> Unplug what you have and look for someone who knows what they're doing. You're either not providing us with the information we've asked for or you're working with a very dangerous system (mains directly connected to circuit).
Dan - Owner

http://www.Hi-TecDesigns.com
RE: arking, relay sound
RE: arking, relay sound
RE: arking, relay sound
RE: arking, relay sound
So, when you say "I read somewhere that two capacitors 220n and 1u on the power supply removes the high frequency spike noise in the system", it's a rule of thumb that works in some places, but it's really dependent on your particular circuit. If you want better info, it would really help to give us a more complete description.