Zusammenarbeit
KUNST
SCHÖNHEIT & WELLNESS
HANDWERK
KULTUR & GESCHICHTE
UNTERHALTUNG
UMFELD
ESSEN & GETRÄNKE
REVERSE ENGINEERING
WISSENSCHAFTEN
SPORT
TECHNOLOGIE
WEARABLES
USB-B Cable: Type-A Plug to Type-B Plug, Wired to the USB 2.0 Specification
A USB-B cable joins a computer (Type-A plug) to a device such as an Arduino board or a printer (Type-B plug).
The USB 2.0 Specification (USB Implementers Forum, 2000) fixes the wiring: contact 1 VBUS on the red wire, 2 D- white, 3 D+ green, 4 GND black, and the plug shells joined through the cable's shield. It also sets the cable's build and its limits: a twisted green-white data pair, a red-black power pair, foil and braid shields, no more than 26 ns of delay, and less than 0.6 ohm from shell to shell.
This rung works out how long the cable may be, then cuts a 1.5 m shielded cable, solders a Type-A plug to one end and a Type-B plug to the other, and checks every wire with a multimeter.
Source: Universal Serial Bus Specification Rev. 2.0, sections 6.4.1, 6.5.2, 6.6, 7.1.16, 7.2.2. Picture: our own drawing.
Fortgeschritten
About 1 hour
Anweisungen
1
1
How long may it be?
How long may it be?
The delay and voltage-drop limits from the specification, and what they allow for each wire size.
2
2
Cut and strip the cable
Cut and strip the cable
Cut 1.5 m of shielded USB cable with a 24 AWG power pair. At each end, slit and remove 20 mm of the PVC jacket with the knife. Comb the braid back over the jacket, trim the foil off and keep the bare drain wire. Strip 3 mm of insulation from the red, black, green and white wires.
Materialien für diesen Schritt:
Abgeschirmtes USB-Kabel1.5 mBenötigte Werkzeuge:
Bandmaß (Rollmeter)
Cuttermesser
Seitenschneider
Abisolierzange
Schutzbrille3
3
Solder the Type-A plug
Solder the Type-A plug
Slide the plug's hood and a 40 mm piece of heat-shrink tubing onto the cable. Tin the wires and solder them to the plug's contacts: 1 red (VBUS), 2 white (D-), 3 green (D+), 4 black (GND). Twist the drain wire into the braid and solder both to the plug's metal shell.
Materialien für diesen Schritt:
USB-Stecker Typ A1 Stück
Schrumpfschlauch40 mm
Lötdraht1 as requiredBenötigte Werkzeuge:
Lötkolben
Dritte Hand4
4
Solder the Type-B plug
Solder the Type-B plug
Do the same at the other end with the Type-B plug: 1 red (VBUS), 2 white (D-), 3 green (D+), 4 black (GND), drain wire and braid to the shell. Pin 1 must reach pin 1 at both ends.
Materialien für diesen Schritt:
USB-Stecker Typ B1 StückSchrumpfschlauch40 mmLötdraht1 as requiredBenötigte Werkzeuge:
LötkolbenDritte Hand5
5
Check every wire
Check every wire
With the multimeter, check that each contact connects to the same contact at the other end and to no other, and that no contact touches a shell. Measure from shell to shell: the specification asks for less than 0.6 ohm.
Benötigte Werkzeuge:
Multimeter6
6
Close the plugs
Close the plugs
Clip the hoods over the plugs, slide the heat-shrink tubing over each joint between hood and cable, and shrink it with the heat gun as a strain relief.
Benötigte Werkzeuge:
Heißluftpistole7
7
History and honest limits
History and honest limits
The specification's revision history dates USB 1.0 to 15 January 1996, 1.1 to 23 September 1998 and 2.0, which added high speed, to 27 April 2000.
The specification requires a standard detachable cable to end in OVERMOLDED plugs; ours has hand-soldered plugs in hoods, so it is not a compliant cable. We do not measure its 90 ohm impedance or its delay. The 1.5 m length, the 24 AWG power pair and the strip lengths are ours. How the plugs and the cable are made is not covered (unknown heads).
Materialien
5- Platzhalter
- 1 StückPlatzhalter
- 80 mmPlatzhalter
- 2 as requiredPlatzhalter
- 1 StückPlatzhalter
Benötigte Werkzeuge
9- 1 vendor sell this, none ship to you yetPlatzhalter
- Platzhalter
- Platzhalter
- Platzhalter
- Platzhalter
- 2 vendors sell this, none ship to you yetPlatzhalter
- Platzhalter
- Platzhalter
- 1 vendor sell this, none ship to you yetPlatzhalter
Dieser Bauplan stellt her
CC0 Gemeinfrei
Dieser Blueprint ist unter CC0 veröffentlicht. Sie dürfen dieses Werk für jeden Zweck frei kopieren, ändern, verbreiten und verwenden, ohne um Erlaubnis zu fragen.
Unterstützen Sie den Maker, indem Sie Produkte über seinen Blueprint kaufen, wo er eine Maker-Provision von Anbietern festgelegt, verdient. Oder erstellen Sie eine neue Iteration dieses Blueprints und verbinden Sie ihn in Ihrem eigenen Blueprint, um Einnahmen zu teilen.