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SSLV1.1 builds & fairy tales
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Old 26th April 2013, 06:51 PM   #2201
Abraxas336 is offline Abraxas336  Europe
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Originally Posted by Salas View Post
You put it to work and the voltage drop across R101 20R confirms 200mA by Ohm's law I=V/R?
As far as I can tell yes. The tool says Voltage drop is 4,25V.
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Old 26th April 2013, 07:04 PM   #2202
Salas is offline Salas  Greece
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SSLV1.1 builds & fairy tales
If you actually use 4 strong leds it maybe there or near there, but always confirm on the actual build in the end that the current is near your goal.
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Old 26th April 2013, 10:32 PM   #2203
MisterRogers is offline MisterRogers  United States
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SSLV1.1 builds & fairy tales
Ok, I could use some help mates. Here's my build:
Click the image to open in full size.

This is built for 18V, component needs 100ma, built for 250ma.

IRF built, HEXFRED 600V 8A diodes, a 1K 5W dummy load, a 10Ohm Zobel, an 1.8K R303, a 5K trimmer with the zener jumped. I'm using a 50VA 12V Amveco wired in series (24v). Also, 10000uf, 63v Nichicon KG and 10UF 100v caps.

When I power it up, the diodes and the Nichicon get very hot very quick. When I read the AC in, it's about 13v (~27v with no load). Thoughts?
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Old 26th April 2013, 10:39 PM   #2204
MisterRogers is offline MisterRogers  United States
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Tested and tuned the positive build, and it'd dead on. Hmmm.
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Old 26th April 2013, 11:08 PM   #2205
Salas is offline Salas  Greece
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Big right side Nichicon on photo is reversed. More voltage and it would bring paper snow Xmas in da house.
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Old 26th April 2013, 11:11 PM   #2206
Salas is offline Salas  Greece
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The one in the negative rail.
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Old 26th April 2013, 11:19 PM   #2207
MisterRogers is offline MisterRogers  United States
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Doh! That makes sense mate - thanks for chiming in to peek. Really appreciate all you do.
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Old 26th April 2013, 11:25 PM   #2208
Salas is offline Salas  Greece
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No worries I do worse all the time. Check if the cap got any damage by examining its top surface for being slightly bulged VS the other one or not.
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Old 26th April 2013, 11:26 PM   #2209
MisterRogers is offline MisterRogers  United States
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Yea, slight bulge. Is it toast?
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Old 26th April 2013, 11:32 PM   #2210
Salas is offline Salas  Greece
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Half done. It would take an ESR meter to compare now and determine if its usable or not. I would recommend to just bin it if it was not an expensive part or put it aside if you got a spare until you can probably check it given an opportunity.
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