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dim bulb tester, "schematic"
dim bulb tester, "schematic"
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Old 18th February 2020, 09:52 PM   #1
acowans is offline acowans
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Default dim bulb tester, "schematic"

I'm ready to test the PSU with a homemade dim bulb tester. Ive attached a drawing of how I believe I should map the wiring thru a single pole switch and in to a simple bulb socket that will have a 65 watt incandescent bulb in it. I have a three wire sacrificial 15 amp cord I plan to use, cutting the black into and thu the switch. Not sure If I should or need to run the ground thru the switch or not and pls note that the bulb socket does not have a ground screw- only a brass and a silver screw, thru which I am planning to run the single black wire after it exits the single pole switch. If anyone can opine that'd be great! Thanks photos attached of the switch, socket and my drawing of the proposed wiring.
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File Type: jpg IMG_5790.JPG (67.5 KB, 377 views)
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Old 18th February 2020, 10:03 PM   #2
Zen Mod is offline Zen Mod  Serbia
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dim bulb tester, "schematic"
it's OK

just take care that everything is properly insulated , so accidental touch can't result in Big BadaBoom
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Old 18th February 2020, 10:07 PM   #3
Soundhappy is offline Soundhappy  France
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Check for safe operation Build Your Own Current Limiter for Protection when Repairing and Testing Electronic Equipment
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Old 18th February 2020, 10:14 PM   #4
acowans is offline acowans
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Thank u! I'll proceed with care - looks like the ground doesn't really need to run thru the switch, just from the wall to the female plug feeding the amp...
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Old 18th February 2020, 10:35 PM   #5
Soundhappy is offline Soundhappy  France
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Yes switch is only on-off contact on the black ( hot ) wire
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Old 18th February 2020, 11:26 PM   #6
Eric is offline Eric  United States
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dim bulb tester, "schematic"
This is one of the most useful pieces of test gear that I own. Well worth the time to build!
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Old 18th February 2020, 11:55 PM   #7
Blk Dynamite is offline Blk Dynamite  United States
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Hands down the best thing I’ve ever built was one these!! Don’t know how many times I’ve been blinded from mine lighting up
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Old 19th February 2020, 12:28 AM   #8
stsmytherie is offline stsmytherie  United States
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dim bulb tester, "schematic"
Super handy thing to have. I built one like this: Dim Bulb Tester – Geek-Tips

Another handy tutorial: Compact Dim Bulb Tester Wiring | Audiokarma Home Audio Stereo Discussion Forums
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Old 19th February 2020, 01:00 AM   #9
Soundhappy is offline Soundhappy  France
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@ Stsmytherie

This one from Your first link is a cute Thanks
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Old 19th February 2020, 01:06 AM   #10
wiseoldtech is offline wiseoldtech  United States
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A couple of years back (2012) I built a variation of a "dim bulb" tester/supply.
Two 40W bulbs, switchable, in-out, with a variac, and also a +/- 50V DC 5A supply (also variable).
All in one repurposed old Heathkit metal shortwave radio case that I had laying around.

Comes in handy once in a while.
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