I'm looking to hear about experiences others here have had with contract PC board assembly (ie - solder paste printing, component placement, reflow soldering), particularly of relatively small production runs (say 100 of each board). We've been doing all of our pc board assembly in-house for the...
I'm curious as to what other engineers are using to draw system-level schematics (as compared to board-level). Like, for example, multiple VFDs and motors supplied by a genset showing individual wires between each, but otherwise representing each device with a generic, geometric shape. More...
I'm working on a rectifier for a drive system that will be supplied by a 625KVA diesel genset. The existing rectifier being used has the usual 3% impedance line reactor as normally specified when a drive is supplied by the mains and this strikes me as both counterproductive (more voltage drop)...
For interconnecting multiple pc boards (both signal and power), I have typically used flat flex cable/connectors or ribbon cable/IDC connectors. I admit I have always been skeptical of the long term reliability of both interconnect systems and a new project I am starting on has placed...
Wanted to solicit the opinions of the eng-tips crowd on this. Got a software engineer friend who is writing the code for some doodad that controls/monitors an IC engine in some gadget (details obfuscated to protect the guilty). He asked me whether a QFN or BGA package of the chip would better...
Is it possible for an SMPS transformer to make it through hipot/safety agency approval testing using triple build wire on all of the primary and secondary windings rather than the usual tape in between each winding? I could really cut down leakage inductance by multifilar winding the transformer...
Hey folks... I have a customer from the railway industry that wants to use one of my DC motor controllers to control the field current in a 1400hp traction alternator. On paper this looks kosher so it got me to wondering how much a real traction field controller costs. Say, something capable of...
I'd like to be able to do some basic "pre-compliance" testing of high power dc motor drives in house. I'm a power electronics kind of guy, not a compliance engineer, but it looks like all I need to do basic far field (10m) testing is an antenna (preferably calibrated) and a spectrum analyzer...
Well, folks, I've gotten by with my THS720 for many years now. It's been a fantastic scope - definitely one of the best-engineered products I have ever used - but it is definitely showing its age because more and more I find myself wishing for faster/better transient capture and math functions...
What I would ideally like is a connector system that is sealed (IP65 or better) and has mating panel mount, through hole headers. Probably pushing my luck here (as if I haven't already), but I'd really like it if they are both vertical with respect to the PCB. Plenty of stuff for wire-to-board...
Just looking to bounce some ideas off you all here. I'm a power electronics kind of guy so sometimes this digital stuff is a bit foreign to me, but, here goes...
I want to clean up the pulses from a generic OC prox switch (could be optical, inductive, etc...) in the presence of incredible...
Greetings all - what a site!
Assuming the tomatoes aren't launched my way in force I will probably be bouncing a bunch of ideas off you all as I have a few projects starting up in the next few weeks.
But for now I'm looking for some ideas on ways to do incoming QC testing of large dc link...
