Electronics Forum | Fri Nov 23 02:46:11 EST 2001 | anders
We are currently handsoldering PCB jumpers. Does anybody have any experience on how the PCB-pad footprint design should be for screenprinting PCB jumpers to ensure that the connection is soldered?
Electronics Forum | Mon Nov 26 19:58:54 EST 2001 | davef
Depends on what you're talking about. For instance: Jumpers between pads: Why not use SMT jumper components? Long ECO jumper runs: When we have a serious problem in the design of our boards, we contract thick film additive jumper work. Search th
Electronics Forum | Tue Nov 27 01:43:29 EST 2001 | Anders
The reason why we are using soldered PCB jumpers is that it is cheaper than dip-switches, 0 ohms resistors, etc. Field updating is also easier. We are producing different variants of some of our products. It would nice if we could presolder the PCB
Electronics Forum | Tue Nov 27 15:57:58 EST 2001 | mparker
rather than applying jumpers, try thinking it another way. Have all possible jumper connections pre-made by the fab design. Use an exacto or dremel to "open" the undesired paths by removing a bit of copper trace. total flexibility, only one fab make
Electronics Forum | Tue Oct 04 20:31:16 EDT 2016 | davef
IPC-7721, Section 6.1, Jumper Wires, Jumper Wire Selection #5 states: "Recommended wire is solid, insulated, plated copper wire, 22 to 32 AWG with a heat resistant insulation. Wire with tin-lead plating may be restricted due to environmental laws."
Electronics Forum | Mon Oct 03 21:02:23 EDT 2016 | rwd
I am doing some rework to my CCA. I then need to conformal coat the board. I'm using Humiseal 1A33 GEL and my jumper wires are teflon coated. I understand the chemical interaction between the 2 products. My question is "Is this an acceptable prac
Electronics Forum | Tue Nov 27 10:16:07 EST 2001 | davef
Oooo, I get it. We do that trick on the wave solder side of boards. On the bare board, during design / layout, the basic shape of the jumper is a 125 thou disc of copper [that of course is eventually covered with whatever solderability preservative
Electronics Forum | Sat Oct 08 11:57:58 EDT 2016 | davef
A friend in the contract coating business said: "... ask why the wire is [teflon] coated in the first place, as only the solder joints should be coated in this situation as the flexing/bending of the wires will cause the coating to crack and flake of
Electronics Forum | Wed Feb 05 11:39:23 EST 2014 | escalador
Hi, I have an old GSM1 p&p machine unused for some time and I would like to know if someone can give me the correct jumper settings for the 3 Radisys UIMC axis control cards that go on slots 10,11 and 12.Someone modified card positions and I dont kno
Electronics Forum | Thu Feb 06 01:56:53 EST 2014 | aflex
Hey, First you need to check if the I/O port setting is ok. Also how many jumpers are you using? Atlast always connect JP4 to PLD registers base address
