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Old 2nd December 2005, 03:29 AM   #61
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Default Soft Switch and Soft Start

Robert,

My second batch of kits arrived today in great shape.....thank you!

Robert
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Old 2nd December 2005, 04:11 AM   #62
AR2 is offline AR2  United States
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All my boards are finished and operational. Rob thank you for your help. After I reversed D1 I descovered that on one board I shorted small capacitor. Fixed that and v'ola everything was fine. All four boards ready to go.
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Old 17th March 2006, 06:34 AM   #63
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Default Soft Switch with Soft Start

Hi Rob,

I got all 4 of my soft switch and soft start boards finished. The soft switch boards are all working perfectly. I wanted to check with you to be sure that the soft starts are also working properly though.

They all do exactly the same thing when testing under no load conditions (just using a DMM to measure output voltage):

As soon as I turn on the soft switch, the soft start output jumps rapidly to full voltage before the relay trips. The pot adjustment for the delay works.....the delay of the relay is adjustable. But there is no change in the output voltage when the relay trips since it is already up to full input voltage.

Does this sound like they are working properly? Since the purpose is to limit current rather than voltage, my measurements may not mean anything?

Thanks! These are nice little switches.

Robert
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Old 17th March 2006, 12:06 PM   #64
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Default Re: Soft Switch with Soft Start

Quote:
Originally posted by rjkdivin
As soon as I turn on the soft switch, the soft start output jumps rapidly to full voltage before the relay trips. The pot adjustment for the delay works.....the delay of the relay is adjustable. But there is no change in the output voltage when the relay trips since it is already up to full input voltage.

Robert, this is a normal measurement. It as a voltage divider with 25 ohms in series, and 10 Meg shunt resistor (typical Rin of DMM). Vout=Vin*[10M/(25+10M)] => Vout=Vin.

The way to tell that the soft start is working properly is to listen for the delay of the latching relay.

--Rob
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Old 17th March 2006, 03:27 PM   #65
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Default Re: Re: Soft Switch with Soft Start

Quote:
Originally posted by Maxhawk

Robert, this is a normal measurement. It as a voltage divider with 25 ohms in series, and 10 Meg shunt resistor (typical Rin of DMM). Vout=Vin*[10M/(25+10M)] => Vout=Vin.

The way to tell that the soft start is working properly is to listen for the delay of the latching relay.

--Rob
Thanks Rob.....everything seems to be working properly on all four sets.

Robert
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Old 12th April 2006, 04:46 AM   #66
jleaman is offline jleaman  Belgium
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Does any one have pictures of the bottom of there board ? I need to see one.
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Old 12th April 2006, 05:01 AM   #67
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Quote:
Originally posted by jleaman
Does any one have pictures of the bottom of there board ? I need to see one.
With or without components stuffed? If you need it with, I can get you one when I return back to the States after 4/19. Or maybe someone can take one for you.
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Old 12th April 2006, 05:06 AM   #68
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by Maxhawk


With or without components stuffed? If you need it with, I can get you one when I return back to the States after 4/19. Or maybe someone can take one for you.

I hope you can or Some one can because i'm having a hard time building this thing with lack of instructions and parts id.
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Old 12th April 2006, 05:12 AM   #69
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Quote:
Originally posted by jleaman



I hope you can or Some one can because i'm having a hard time building this thing with lack of instructions and parts id.

Did I not include schematics, layouts, bill of materials, and assembly drawings in the package? If you don't have them, I apologize for forgetting them. You can find them on my site:

http://www.robcheng.com

Click on Audio -> Electronics -> Soft Switch V2
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Old 12th April 2006, 05:26 AM   #70
jleaman is offline jleaman  Belgium
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You sent me a bill of material's but it does not show what part is witch.

example resistor 1003 means what ? or 1001

Also on the corner of the pcb it says r8 510 and looking at r8 on the x-cell sheet i see

R7, R8 Resistor 1K 5% SMD 1206 Panasonic

So im a little confused if i could see the bottom of some ones that works Id be happy.. Im going to stop tonight. So far i have a few 22k resistors mounted.and the 7812 and the bridge rectifier.

On another note i see this on the x-cell sheet

R1, R2, R6, R9, R10, R12 Resistor 22K 5% SMD 1206 Panasonic ERJ-8GEYJ223V

but on the board r6 says 1k. Soo.....
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