Showing posts with label cable. Show all posts
Showing posts with label cable. Show all posts
Sunday, 22 January 2017
How to make a guitar cable
Today we're going to do a quick run through of how to make a guitar cable. It’s a pretty simple procedure, but if you’ve never made one before, it can be a little bit daunting at first.
To make a cable, you will need to following items:
- Some cable
- Two ¼” jack plugs
- A soldering iron and some solder
- Wire cutters/strippers/pliers
Here’s the cable we're going to use:
And we're going to use two of these jack plugs:
I really like this design of plug (and I’ve used a tonne of different ones over the years). To open it, you unscrew the end cap/cable relief:
Then lift up the cover:
Which reveals the following:
Obviously you can use a different design if you like.
Today we're making a short cable that will go between effects pedals. There’s nothing different between this sort of cable and a standard guitar cable, apart from the length.
This one, we're going to cut to 20cm (8”):
Then trim the outer sleeve back by 15mm (a little under 5/8”):
We trim the inner wire insulation back by a few mm and then twist the end of the wire together. The outer shielding wiring is also gathered and twisted together:
All of this is done at both ends, leaving us with this:
We then slide any necessary items over the cable before doing any soldering. You’ll get away with forgetting this for the first plug, since you can always slide it on from the other end after soldering. However, for the second plug, it’ll be too late and you’ll have to unsolder something to fix it.
Next step is to melt a couple of healthy blobs of solder onto the two positions where we intend to attach wires.
Then we “tin” the wires, which is to say, we melt a little bit of solder onto them:
We're also going to cut the outer ground wire a little shorter, so that it fits its position on the plug better:
Now we solder the wires on. When doing this, try not to keep the soldering iron on the plug for an extended amount of time, as some of them can be ruined very easily.
Firstly, the ground wire:
And then the positive/tip wire:
Before closing up, we need to secure the cable by tightening the metal clamp as follows:
Then we place the cover back in place:
And tighten the end plug/cable relief:
We do the same for the other end of the cable:
And here’s the end result:
Saturday, 3 December 2016
USB cable signals
USB cable consists of 4 wires plus a conductor wire wrapping, such as the protectors are usually found in the audio cable. Cable number 1 is used to channel resources to the voltage of 5 volts, if necessary USB devices may draw power from this line and should not exceed 100 mA. Computer equipped with USB capability, is required to provide power at 100 mA for this purpose. USB devices that require more power than the aforementioned provisions, must provide their own resources for the purposes work equipment.
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| The USB cable signals |
Number 4 is the ground cable as a back channel source voltage of 5 volts. Cable number 2 and number 3 is used for signal transmission. No. 2 cable and cable called D-3 numbers called D, the voltage on the two channels is changed between 0 Volt and 3.3 Volt. Digital signal is sent through the two channels are said to be 'difference signal', which means that the signal digital '0 'or '1' is not declared to the magnitude of the voltage on the channel to the ground, as well as digital signals used in the IC TTL (transistor Transitor Logic) or the RS232 channel.
Digital signal is expressed by the voltage difference between the two cables. If the voltage on the D channel is higher than the voltage at D-channel, then the information transmitted digital signal is '1 ', otherwise the digital signal '0' is expressed by the voltage at D <voltage at D-. To distinguish the speed of data transmission, the channel USB devices attached to the 3.3 Volt prisoners in different ways, as shown in Fig.
At low speed USB devices, the D-channel to 3.3 Volt dipasangan custody, or in the absence of information transmission, the channel is in state '0 '. For full speed USB device, such resistance is connected to the D channel, so that in the absence of data transmission channels are in state '1 '.
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