Questions tagged [jumper]
Conductor used to close/open a circuit by connecting/disconnecting a pair of circuit nodes on a PCB. Circuits can also be bypassed using this method by connecting circuit nodes in order to short out the circuit to be bypassed. Jumpers are often used to configure a PCB.
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Jumper on 100 Mbps Ethernet
Is it possible to pass a 100BASE-TX signal (100 Mbps Ethernet, over 2 differential pairs) through jumpers (one per wire), in order to allow the user to select Ethernet or serial for a given connector?
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Is there a standard for labeling PCB jumpers by their function (enable or disable)?
For example, I have a circuit with different revisions that had to have two different voltage regulators. The original regulator needed a jumper pad cut to disable it, the other needed a solder pad ...
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How to determine contacts to jump a SMD button on garage door remote?
I am attempting to control my garage door remote using a Raspberry Pi controlled relay. I have done this in the past with other remotes (i.e. the relay part is not an issue), but my new house's garage ...
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Symbol for ground vs symbol for a battery [closed]
Could anyone help me to understand if this picture is correct?
It is to understand the difference between the symbol of a battery terminals and the symbol of a ground terminal.
I would also ...
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What is an ideal layout for a normally-open solder jumper?
We would like to make a normally-open solder jumper between two 50x50mil unmasked square pads. I've seen this kind of thing by others and would like to replicate it in our layout. We tried a simple ...
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What are these small tubes soldered into through holes for jumper wires called?
I am working with ancient 70s PCBs and have encountered these small metal tube-like posts that appear to be soldered into through-holes.
They are used to make and remove optional jumper connections ...
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How to Design Jumpers to Connect a circuit and Disconnect another
I'm designing a PCB where I will use either a Micro SIM through a SIM card holder or an eSIM. I thought I would use a solder jumper to let the user select which SIM option to use, but I don't know how ...
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How to convert from one header pin diameter to another?
I've unfortunately/accidentally purchased some 2.54 mm-pitch headers with pin-diameter 0.5 mm -- significantly thinner than the common DuPont cables with pin-diameter 0.64 mm. (When ordering them, I ...
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Why are the 3.3V and 5V power lines shorted in this diagram? [duplicate]
This is the official schematic of ESP32-CAM:
Here is the area of interest:
Why does this schematic imply that the 3.3V and 5V power lines are shorted through 0 ohm resistors? The masured voltage at ...
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SOT23 package jumper [duplicate]
I’m replacing some components on existing PCB, and I need to replace transistor in SOT23 package with a jumper. Problem is that none of the standard jumper packages are not suitable for more than a ...
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MCP2515 CAN Transceiver Breadboard vs direct PCB Female Header connection
I have experienced a case, where I connect the MCP2515 over jumper wires to uC and everything works as intended.
However, when I plug MCP2515 directly in the PCB (through female headers), the MCP2515 ...
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Does the dropper between the catenary wire and contact wire carry current?
From my observations, droppers are of metal and they do not have any insulation from the catenary wire or from the contact wire.
The catenary and contact both carry the same phase and voltage so any ...
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Difference between jumper wires and jumper leads
I'd like to know what is the difference between a jumper wire and a jumper lead; sometime I found that they are synonims, other times I found that a jumper wire is the following:
other times I found ...
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How to separate two boards joined by many folded jumper wires
I'm trying to fix an oven that is not heating. Based on voltage readings at the elements, I am highly suspicious of the relays. Apparently burnt relays or blown solder joints on the relays are a semi-...
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Can I put a 2 pin switch on breadboard busses?
I want to run a 12V battery into the breadboard busses, but they are 12 gauge wire so I want to use 2 pin screw terminals. The battery will power another device which also has 12 gauge wire so I'll ...
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