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What's the connector used to terminate a keyboard wire called?
http://storage1.static.itmages.com/i...2ac4dc2df9.png
I have a USB keyboard with a defective cable (i'm retaining the USB-A connector). I'm replacing it with a normal cable from a PS2 which i need to solder to the USB-A plug/connector. What you are seeing is the opened keyboard-PCB connector and PS2 connector (internal that;s plugged into it). I want the name of the white connector (it's a 5 hole female rectangular thingy) that plugs into a male 5-pin/needle connector that's soldered on to the keyboard pcb |
#2
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What's the connector used to terminate a keyboard wire called?
On 7/9/2016 8:38 AM, Veek. M wrote:
http://storage1.static.itmages.com/i...2ac4dc2df9.png I have a USB keyboard with a defective cable (i'm retaining the USB-A connector). I'm replacing it with a normal cable from a PS2 which i need to solder to the USB-A plug/connector. What you are seeing is the opened keyboard-PCB connector and PS2 connector (internal that;s plugged into it). I want the name of the white connector (it's a 5 hole female rectangular thingy) that plugs into a male 5-pin/needle connector that's soldered on to the keyboard pcb Looks to be a standard IDC connector such as one would find for a USB connection on a motherboard. One would have to measure the pin spacing to be more certain. They can be either white or black and the color doesn't really mean anything. If you don't have the proper crimper and experience, it might be easier to buy a short cable with the proper connector and then splice into that. Here is an example of a ready-made cable: https://www.startech.com/Cables/USB-...ble~USBINT5PIN or you might have an unused example inside your computer -- sometimes there are connections provided that are not used (but it might take a bit of nerve for a novice to start cutting cables, even unused ones, inside a computer case). |
#3
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What's the connector used to terminate a keyboard wire called?
Veek. M wrote:
http://storage1.static.itmages.com/i...2ac4dc2df9.png I have a USB keyboard with a defective cable (i'm retaining the USB-A connector). I'm replacing it with a normal cable from a PS2 which i need to solder to the USB-A plug/connector. What you are seeing is the opened keyboard-PCB connector and PS2 connector (internal that;s plugged into it). I want the name of the white connector (it's a 5 hole female rectangular thingy) that plugs into a male 5-pin/needle connector that's soldered on to the keyboard pcb Examine the connector and see if it can be reused. A wire connector like that (wire to board), can use crimp pins. There is a tiny spring tab on each pin, which holds it into the box. If you depress the spring tab (visible through a tiny window in the plastic), you can pull the wire and pin backwards and out of the connector body. Make a drawing of the pin one indicator, and the color of each wire, before you begin. Or take a few digital camera photos, so you get the wire order correct. If you put the colors in the wrong holes, you'll blow up something. Page 33 top left, shows a wire connector with 0.1" contact spacing. The crimp pins that fit into the connector, are purchased separately and are shown next to the plastic bit. This picture will illustrate a tiny bit, the parts of the connector. The left hand side of the connector pin, has a 45 degree slope, and that's what contacts the male pin it is mating with. The middle crimp and end crimp hold onto the wire. I don't even have the right tool to crimp those, but that hasn't stopped me from using needle-nose pliers to finish the job. I believe the middle crimp is for the wire, the end crimp can grip the plastic insulation, but I use both crimps for the wire itself. And don't bother building strain relief of any sort. http://www.mode-elec.com/Products/catalog.pdf The back of the connector has a bigger aperture than the front (that plugs in). The front will have a square hold, only a little bigger than the dimensions of the pin. The back hole, where the pin and wire enter the body, is much larger. Sometimes stuff like this is hot molded, and impossible to recycle. And I cannot tell if that's how they made yours or not. Best guess, Paul |
#4
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What's the connector used to terminate a keyboard wire called?
Veek. M wrote:
http://storage1.static.itmages.com/i...2ac4dc2df9.png I have a USB keyboard with a defective cable (i'm retaining the USB-A connector). I'm replacing it with a normal cable from a PS2 which i need to solder to the USB-A plug/connector. What you are seeing is the opened keyboard-PCB connector and PS2 connector (internal that;s plugged into it). I want the name of the white connector (it's a 5 hole female rectangular thingy) that plugs into a male 5-pin/needle connector that's soldered on to the keyboard pcb Won't work UNLESS the keyboard has builtin circuitry to perform automatic hardware protocol switching. You cannot plug a USB-only keyboard into a PS/2 port (unless you buy an active converter which costs more than getting a new keyboard). USB and PS/2 use *different* hardware protocols. A PS/2 only keyboard won't communicate using the USB hardware protocol to a USB port. A USB only keyboard won't communicate using the PS/2 hardware protocol to a PS/2 port. You would need a USB+PS/2 keyboard that has builtin auto-detect circuitry to support connecting the keyboard to either USB or PS/2 ports. You cannot simply rewire the cable nor will a passive USB-to-PS/2 dongle work. Either the hardware protocol conversion circuitry has to be inside the keyboard or you get an active converter to which the keyboard connects. USB has 4 lines: data+, data-, power (5V), and ground. Differential data signaling is used to eliminate induced noise (EMF). See: http://pinouts.ru/Slots/usb_pinout.shtml. PS/2 has 4 lines: data, ground, VCC (5V), and clock. There are 6 pins but 2 are unused (there is a dual-PS/2 version where the unused pins get used for data2 and clock2). You can already see the differences in the signaling. See http://pinouts.ru/Inputs/KeyboardPC6_pinout.shtml. You never mentioned the brand and model of the keyboard. If it is a USB-only keyboard, no rewiring job is going to make it work on a PS/2 port (unless you also rewire the PS/2 port to effectively continue use the USB hardware protocol but with mismatched connectors). I'm not clear if you are trying to use a PS/2 connection with your USB keyboard or if you merely clipped the cord from a PS/2 cable and intend to use just the wiring to solder it onto both a USB-A connector and onto the keyboard's PCB. Seems a neater and easier job to just get a USB cable, snip off one end leaving the USB-A end, and solder the cable onto the same spot at the connector inside the keyboard. Electrically the connector is superfluous: it was used for assembly requirements. Or you could leave the connector inside the keyboard, snip its wires about 2 inches out, slide on some heatshrink tubing over each wire, and solder splice the USB cable onto the leads from the connector, and then heat the heatshrink tubing. The splice job would be hidden inside the keyboard. If you absolutely must have a primo wire job (no splicing), DigiKey has lots of connectors. The problem is that you won't have the crimp tool to attach wires to the pins that go into the connector. Soldering would have to be delicate so it doesn't enlarge the backend of the connector pin to prevent it sliding into the connector. A needle nose plier could be used for crimping but it's a sloppy method, especially when you decided to get the connector to do a neat job. |
#5
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What's the connector used to terminate a keyboard wire called?
Veek. M wrote:
http://storage1.static.itmages.com/i...2ac4dc2df9.png I have a USB keyboard with a defective cable (i'm retaining the USB-A connector). I'm replacing it with a normal cable from a PS2 which i need to solder to the USB-A plug/connector. What you are seeing is the opened keyboard-PCB connector and PS2 connector (internal that;s plugged into it). I want the name of the white connector (it's a 5 hole female rectangular thingy) that plugs into a male 5-pin/needle connector that's soldered on to the keyboard pcb Thanks guys - got it working - awesome replies. |
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