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| Why isn't there many soldering station that uses a switch-mode converter? |
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| Nusa:
--- Quote from: coppercone2 on December 19, 2018, 01:41:21 pm ---I am pretty sure the art of electronics or some other book had a nice circuit for protecting transformers from this. --- End quote --- First have a fuse on the AC line. Pick a fuse value that will never blow in normal operation, but not needlessly large. This is just basic safety, even if there's a loophole in regulations. For over-voltage protection: add an appropriate varistor between line and neutral, after the fuse. The varistor will conduct when its voltage spec is exceeded causing the fuse to pop very quickly. Transformer survives. |
| technix:
--- Quote from: LapTop006 on December 19, 2018, 12:25:18 pm --- --- Quote from: Nusa on December 18, 2018, 06:29:05 am ---Dave is something of a special case. Most of us don't have to worry much about having ~120V hardware lying around to accidentally plug into ~240V power. Especially those of us that live in ~120V areas, as the reverse case isn't very dramatic. --- End quote --- It's more common than you might think, I work with a bunch of deployment engineers who are always travelling to various datacenters, even in 110v parts of the world it's not uncommon to only have >200v power easily available (sometimes 208, but usually 220-250v). --- End quote --- Let’s not mention Japan... They have both 120V and 240V systems within the same country. From Nagoya to Fukushima the mains suddenly runs on a different voltage. |
| LapTop006:
--- Quote from: blueskull on December 19, 2018, 06:51:33 pm --- --- Quote from: technix on December 19, 2018, 05:58:58 pm --- --- Quote from: LapTop006 on December 19, 2018, 12:25:18 pm --- --- Quote from: Nusa on December 18, 2018, 06:29:05 am ---Dave is something of a special case. Most of us don't have to worry much about having ~120V hardware lying around to accidentally plug into ~240V power. Especially those of us that live in ~120V areas, as the reverse case isn't very dramatic. --- End quote --- It's more common than you might think, I work with a bunch of deployment engineers who are always travelling to various datacenters, even in 110v parts of the world it's not uncommon to only have >200v power easily available (sometimes 208, but usually 220-250v). --- End quote --- Let’s not mention Japan... They have both 120V and 240V systems within the same country. From Nagoya to Fukushima the mains suddenly runs on a different voltage. --- End quote --- Frequency changes. Voltage remains. It's always 100V, with split phase 200V. --- End quote --- Funny you should mention that. Japan was one of the places where we had a DC that couldn't do standard voltage. This got extra funny when a telco didn't have any demarc boxes that would work off 208. Even sillier, that telco was the owner of the DC... |
| Berni:
--- Quote from: blueskull on December 19, 2018, 06:51:33 pm --- --- Quote from: technix on December 19, 2018, 05:58:58 pm --- --- Quote from: LapTop006 on December 19, 2018, 12:25:18 pm --- --- Quote from: Nusa on December 18, 2018, 06:29:05 am ---Dave is something of a special case. Most of us don't have to worry much about having ~120V hardware lying around to accidentally plug into ~240V power. Especially those of us that live in ~120V areas, as the reverse case isn't very dramatic. --- End quote --- It's more common than you might think, I work with a bunch of deployment engineers who are always travelling to various datacenters, even in 110v parts of the world it's not uncommon to only have >200v power easily available (sometimes 208, but usually 220-250v). --- End quote --- Let’s not mention Japan... They have both 120V and 240V systems within the same country. From Nagoya to Fukushima the mains suddenly runs on a different voltage. --- End quote --- Frequency changes. Voltage remains. It's always 100V, with split phase 200V. --- End quote --- Japan has both 50 Hz and 60 Hz ? Why in the world would they do that. |
| diyaudio:
Interestingly the advantage of a EI core vs a switch mode power supply. Bad. - A decent SMPS is expensive. - The base of the station will be to flimsy on the desk. The EI core acts as a damper weight. - Take into account this thing will be used on expensive circuits A transformer is just cheaper overall, for the function and purpose. I think better innovation needs to be applied to solder-station cord quality, ergonomics of the head and iron tip aesthetically and functionally. |
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