| Electronics > Beginners |
| Thing I got on eBay... |
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| GadgetBoy:
--- Quote from: Stray Electron on September 06, 2018, 03:02:35 am --- FWIW, I have a good number of Meanwell supplies that I've taken out of surplus equipment and they work very well. --- End quote --- Wanna sell me one? [emoji14] Sent from my ONEPLUS A3000 using Tapatalk |
| GadgetBoy:
--- Quote from: GigaJoe on September 06, 2018, 03:30:12 am ---same thing ? : https://www.aliexpress.com/store/product/-/824214_32884751027.html --- End quote --- Yah, something like that. Sent from my ONEPLUS A3000 using Tapatalk |
| 6PTsocket:
--- Quote from: GadgetBoy on September 06, 2018, 01:36:08 am --- --- Quote from: blueskull on September 06, 2018, 01:10:52 am --- --- Quote from: GadgetBoy on September 06, 2018, 12:00:52 am ---Is there a way I could still use this to get 50v out, or should I look for a transformer? Is there a non transformer way I can turn mains (120V) into 50V without a transformer/switching power supply? --- End quote --- Yes, but that would probably illegal, or at least illegal in near future. Those SCR choppers inject a heck lot of noise to the grid. Considering high frequency MOSFET chopper technology is so mature and cheap these days, SCR choppers should have been abolished. --- End quote --- So basically, I should stay far, far away from it. It didn't look safe to use Sent from my ONEPLUS A3000 using Tapatalk --- End quote --- There are already millions of circuits like that in daily use. I hardly consider them dangerous. They control incandescent lamps and universal motors found in corded drills routers and other power tools. They even work well with some LED bulbs. I have a table lamp that dims to almost nothing with an LED and old style dimmer. They are wall mounted in many homes. I have heard nothing about outlawing them in the US. They are not the answer to your project but they have their uses. They are especially good for resistive loads thst don't care about wave shape. They are cheap and simple.Most dimmers of this type have a little noise suppression built in. Sent from my SM-G900V using Tapatalk |
| GadgetBoy:
--- Quote from: 6PTsocket on September 06, 2018, 06:05:09 am ---There are already millions of circuits like that in daily use. I hardly consider them dangerous. They control incandescent lamps and universal motors found in corded drills routers and other power tools. They even work well with some LED bulbs. I have a table lamp that dims to almost nothing with an LED and old style dimmer. They are wall mounted in many homes. I have heard nothing about outlawing them in the US. They are not the answer to your project but they have their uses. They are especially good for resistive loads thst don't care about wave shape. They are cheap and simple.Most dimmers of this type have a little noise suppression built in. Sent from my SM-G900V using Tapatalk --- End quote --- *blink* This is excellent information. You just helped me realize that I can use it for my carbon fibre heating cable. I attached a picture of the thing. I was working on tracing the schematic, if you're interested. Sent from my ONEPLUS A3000 using Tapatalk |
| oPossum:
48 VDC power supplies are used in telco, networking, and some computers. They can be found for cheap with the right search terms. The trick is to find some common product that used one and search for the part number of the product or the power supply used in it. Most sellers don't list the specs of the power supply so searching for '48V DC power supply' will not find the bargains. For example, some Sun midsized systems use 48V power supplies. Searching for 'Sun power supply' found this... https://www.ebay.com/itm/312215564219 That is ~1 kW for under $20. Using a power supply like that will require figuring out the pinout, and dealing with the hot swap connectors. Usually not too difficult. |
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