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#11
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ATEN CS-104 KVM switch need power cord
Piper wrote:
Detrmining voltage looks critical. I sure don't wanna destroy the KVM. Looke like I may be in deep doodoo here. Dammit. Paul already mentioned the KVM's power input is 9 VDC. Don't know what was Paul's references. The link I gave to the KVM's online manual, page 3, says the same. |
#13
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ATEN CS-104 KVM switch need power cord
On 11/25/2018 5:00 PM, Paul wrote:
wrote: On Sun, 25 Nov 2018 16:06:58 -0500, wrote: On Sun, 25 Nov 2018 15:13:56 -0500, John McGaw wrote: On 11/25/2018 11:16 AM, wrote: I have an old ATENÂ* CS-104 KVM switch that I want to try before I toss it.Â* But I need the power cord with its AC/DCconverter-I can't find mine.Â* Anyone know of where I might get/buy same?Â* I don't see anything on EBAY. Just hopin' Pete Probably this would do that job but you'd have to determine what the total power consumption of the KVM is first: https://www.amazon.com/Universal-Ada.../dp/B06ZZMGLJ2 At leasr I can see how the thing connectsÂ* to AC and it is chaper than RSÂ* @ https://www.radioshack.com/products/...wer-ac-adapter Thanks I think I will buy it. Pete OHOH Detrmining voltage looks critical.Â* I sure don't wanna destroy the KVM.Â* Looke like I may be in deep doodoo here.Â* Dammit. Thanks Pete The input requirement is 9V @ 0.25A . The product John McGaw picked is 9V @ 1.2A (i.e. OK). The adapter uses a rotary 7 position switch to select the desired output voltage. You should feel a little detent as the switch rotates past each position. With the arrow pointed roughly at 9, it will give 9.0 volts. Which is what you want. That's not a potentiometer, and is not "continuously adjustable". It has discrete voltage values, and the switch contacts close inside to select one of the 7 values available. Your KVM draws 0.25A, which is less than the 1.2A maximum load the adapter supports. There is plenty of headroom and that's what you want. You wouldn't want the converse, like a 1.2A KVM and a 0.25A adapter, because then the adapter would shut itself off. When the load (0.25A) is less than the max (1.2A), the adapter provides the 0.25A you need and not more. It's a rating of capability, rather than being "shoved in" no matter what. So the 9V number is the critical one, because the adapter is a voltage source. That's the one we're most concerned about matching. And the source and load are 9V=9V . Whereas for the current flow value, as long as the load draws less than the max the adapter is capable of, everybody is happy. The hardest part of the job, will be fitting the plug. And that part, is the unfortunate part of barrel designs. It's not idiot proof. As an engineer, I don't like to see designs like that, as it leaves too much to the imagination. It is possible to make connectors that resist rotation or reversal or fitting wrong voltages together. But unfortunately, the 15 different barrel types, just don't have any purpose. What you'll normally find, is of the 15 barrel types, only about 2 are popular for computer electronics. And those are likely to be in the little kit you're getting. Another peculiarity, is two of the barrels are damn close in dimensions. If you're standing in a RadioShack testing those two, you can't tell which one to buy :-/ I love stuff like that, knowing they're nominally "different" but not knowing which I should select. The RadioShack guy wasn't much help. No, I didn't buy both of them. The two popular barrels are sufficiently different, you can tell them apart. Â*Â* Paul Yeah. I seem to remember coming across a barrel connector where the outside diameter was "normal" but the inner did not match up. Some research suggested that there were three different option for that spec. Luckily, as you wrote, there are far fewer types in common use that there were in the past. I must have at least a dozen Netgear-compatible dongles around putting out an identical 12V but with current ratings from 0.5A up to 3A with everything from old-school iron-transformer/rectifier/filter to modern switcher designs. |
#14
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ATEN CS-104 KVM switch need power cord
On Sun, 25 Nov 2018 15:48:09 -0600, VanguardLH wrote:
Piper wrote: Detrmining voltage looks critical. I sure don't wanna destroy the KVM. Looke like I may be in deep doodoo here. Dammit. Paul already mentioned the KVM's power input is 9 VDC. Don't know what was Paul's references. The link I gave to the KVM's online manual, page 3, says the same. It says same right on the KVM (+9VDC) Pete |
#15
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ATEN CS-104 KVM switch need power cord
On Sun, 25 Nov 2018 15:13:56 -0500, John McGaw
wrote: On 11/25/2018 11:16 AM, wrote: I have an old ATEN CS-104 KVM switch that I want to try before I toss it. But I need the power cord with its AC/DCconverter-I can't find mine. Anyone know of where I might get/buy same? I don't see anything on EBAY. Just hopin' Pete Probably this would do that job but you'd have to determine what the total power consumption of the KVM is first: https://www.amazon.com/Universal-Ada.../dp/B06ZZMGLJ2 Wow! To get the thing before 2019, they want $26+ for shipping a $10 item.. Gotta think about that. That's 1 reason I try to only buy US. Pete |
#16
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ATEN CS-104 KVM switch need power cord
On 11/26/2018 6:54 AM, wrote:
On Sun, 25 Nov 2018 15:13:56 -0500, John McGaw wrote: On 11/25/2018 11:16 AM, wrote: I have an old ATEN CS-104 KVM switch that I want to try before I toss it. But I need the power cord with its AC/DCconverter-I can't find mine. Anyone know of where I might get/buy same? I don't see anything on EBAY. Just hopin' Pete Probably this would do that job but you'd have to determine what the total power consumption of the KVM is first: https://www.amazon.com/Universal-Ada.../dp/B06ZZMGLJ2 Wow! To get the thing before 2019, they want $26+ for shipping a $10 item.. Gotta think about that. That's 1 reason I try to only buy US. Pete No need to get upset. Here is the identical item and it is shipped by Amazon so no wait and minimal/no shipping charges: https://www.amazon.com/SODYSNAY-Univ...+power+adapter |
#17
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ATEN CS-104 KVM switch need power cord
On Mon, 26 Nov 2018 07:11:40 -0500, John McGaw
wrote: https://www.amazon.com/SODYSNAY-Univ...+power+adapter These are scary warninga (to me): ?Adapter Input?: AC 100V~240V 0.25A 50/60Hz, Adapter Output: 3V/4.5V/5V/6V/7.5V/9V/12V. ?How to USE?:?.Connect the correct adapter tip and make sure that it's firmly attached to the dc input port of your device.?.Set the right DC output voltage. There are 7 options for you, DC 3V/4.5V/5V/6V/7.5V/9V/12V.?.Connect the adapter to the electrical socket.?.Now you can power up your device! ?Multi Voltage replacement?:Six detachable DC output plugs make it fits 95% of AC/DC appliances, Such as 3V to 12V Household Electronics, Scales, Routers, Speakers, LED Strip Lights, CCTV camera system, USB Charging Camera, Smart phones and so on. ?NOTE?: NOT compatible with laptop or other high power equipment, ie, NOT Compatible with Over 30W Devices and the Polarity could not be reversed. ?ATTENTION?: DC Plug Polarity: inner Positive(+), outer Negative(-). If You Are Looking for an Opposite Polarity Charger, Please Search B01IVPXV38 or www.amazon.com/dp/B01IVPXV38. If you have any other questions or advise, please feel free to contact us at any time. Pete |
#18
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ATEN CS-104 KVM switch need power cord
On Mon, 26 Nov 2018 07:11:40 -0500, John McGaw
wrote: https://www.amazon.com/SODYSNAY-Univ...+power+adapter I BOUGHT IT THANKS PETE |
#19
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ATEN CS-104 KVM switch need power cord
wrote:
?ATTENTION?: DC Plug Polarity: inner Positive(+), outer Negative(-). If You Are Looking for an Opposite Polarity Charger, Please Search B01IVPXV38 or www.amazon.com/dp/B01IVPXV38. Your solution comes in two pieces. _____ / \ +----+ +--------+ / \ | ----- Barrel --- Adapter xxxxxxxxxxxxxxxxxxxxx| O o | | ----- --- \ Female/ +----+ +--------+ \_____/ | | == Male pins That is a "polarized" adapter. The matching plugs have (+) and (-) written on the side of the L-shaped thing that plugs into the end of the adapter. The two holes are different sizes, so it only plugs in one way. The male pins are two different diameters. The female portion has one hole bigger than the other. Because it only plugs in one way, the product delivers "Center Positive" by default. Before buying a keyed product like that, you verify your KVM is "Center Positive" before buying a Center Positive (keyed style) adapter. ******* The other kind of adapter (ones at RadioShack) have identical sized holes on the Adapter end piece. _____ / \ +--------+ / \ --- Adapter xxxxxxxxxxxxxxxxxxxxx| O O | --- \ / +--------+ \_____/ As a consequence of this choice, the L-shaped piece that plugs into that, goes *two possible ways*. It can go the right way and the wrong way, so to speak. If you were to buy such a thing, you'd use your multimeter to verify the center pin was positive with respect to the shield. This must be done with some care, to avoid unnecessarily shorting out the adapter. This is the kind I own. Because of the added flexibility, I can have "Center Positive" or "Center Negative", just by rotating the L-shaped piece before plugging it into the adapter. Such an adapter is only recommended for those who like multimeters and have some grasp of the basics of "electricity" :-) Not many pieces of electronics have polarity protection, but some do. ******* Since you bought the top item, you won't have to worry. When you get it, verify it's "keyed" by means of the two hole sizes, and that the plug only goes in one way. (When the L-shaped meets the adapter end, only one way of inserting it.) The product is keyed for "Center Positive". As long as the label in the KVM plastic shows "Center Positive" as well, you're all ready to go. I still like to use my multimeter, because I'd a curious individual who verifies lots of stuff. That's just the way I am. Paul |
#20
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ATEN CS-104 KVM switch need power cord
On Mon, 26 Nov 2018 12:06:36 -0500, Paul
wrote: wrote: ?ATTENTION?: DC Plug Polarity: inner Positive(+), outer Negative(-). If You Are Looking for an Opposite Polarity Charger, Please Search B01IVPXV38 or www.amazon.com/dp/B01IVPXV38. Your solution comes in two pieces. _____ / \ +----+ +--------+ / \ | ----- Barrel --- Adapter xxxxxxxxxxxxxxxxxxxxx| O o | | ----- --- \ Female/ +----+ +--------+ \_____/ | | == Male pins That is a "polarized" adapter. The matching plugs have (+) and (-) written on the side of the L-shaped thing that plugs into the end of the adapter. The two holes are different sizes, so it only plugs in one way. The male pins are two different diameters. The female portion has one hole bigger than the other. Because it only plugs in one way, the product delivers "Center Positive" by default. Before buying a keyed product like that, you verify your KVM is "Center Positive" before buying a Center Positive (keyed style) adapter. ******* The other kind of adapter (ones at RadioShack) have identical sized holes on the Adapter end piece. _____ / \ +--------+ / \ --- Adapter xxxxxxxxxxxxxxxxxxxxx| O O | --- \ / +--------+ \_____/ As a consequence of this choice, the L-shaped piece that plugs into that, goes *two possible ways*. It can go the right way and the wrong way, so to speak. If you were to buy such a thing, you'd use your multimeter to verify the center pin was positive with respect to the shield. This must be done with some care, to avoid unnecessarily shorting out the adapter. This is the kind I own. Because of the added flexibility, I can have "Center Positive" or "Center Negative", just by rotating the L-shaped piece before plugging it into the adapter. Such an adapter is only recommended for those who like multimeters and have some grasp of the basics of "electricity" :-) Not many pieces of electronics have polarity protection, but some do. ******* Since you bought the top item, you won't have to worry. When you get it, verify it's "keyed" by means of the two hole sizes, and that the plug only goes in one way. (When the L-shaped meets the adapter end, only one way of inserting it.) The product is keyed for "Center Positive". As long as the label in the KVM plastic shows "Center Positive" as well, you're all ready to go. I still like to use my multimeter, because I'd a curious individual who verifies lots of stuff. That's just the way I am. Paul Hi Paul - You know who I am. Much help in the past. Looks like I'm ok. I shud receive the adapter in a week or two. In the meantime - now that I have your attention - I can use your guidance in another area. I use a laptop to play movies on my TV via cable connecting the laptop HDMI to the TV HDMI, both female. A HDMI cable does the trick. Wouldn't you know - the laptop has gone up. To save my marriage, I thought to connect an unused XP PC to the TV, and need an adapter to do the job. This looks good: https://www.amazon.com/Gold-Plated-Adapter-Active-Converter-Meters/dp/B07CB83X4N/ref=asc_df_B07CB83X4N/?tag=bingshoppinga-20&linkCode=df0&hvadid={creative}&hvpos={adpositio n}&hvnetw=o&hvrand={random}&hvpone=&hvptwo=&hvqmt= e&hvdev=c&hvdvcmdl={devicemodel}&hvlocint=&hvlocph y=&hvtargid=pla-4584482455415643&psc=1 What do you think? Thanks as before. Happy gobble gobble. Pete |
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