Electronics Forum | Thu Mar 01 23:15:28 EST 2007 | jmelson
You shouldn't be worrying about "impedance" on a DC relay. Just measure the resistance with a Voltmeter/Ohmmeter. If you need to know the current draw, it will be 24/resistance The impedance of an AC relay changes as the armature moves from the "off
Electronics Forum | Fri Jan 22 18:05:44 EST 1999 | David
Could anyone send me equations to calculate controlled impedance of traces on circuit boards. I am most interested in the buried traces in multi layer boards. Thanks, David - piengr@verinet.com
Electronics Forum | Thu Mar 01 23:05:29 EST 2007 | Khader
Kindly explain to me how to calculate 24V DC Relay Coil Impedence for a 2PDT Relay.
Electronics Forum | Sat Aug 01 02:45:26 EDT 2015 | sarason
When it becomes critical. ie impedance influences the design. Pulling a figure out of the air lets say 100 Mhz. If this is a first time board with TTL or 74HC series IC's you are not in that camp. regards sarason
Electronics Forum | Mon Jul 10 02:54:39 EDT 2017 | dawson
Is there any designer here and recommend the best trace impedance calculator you think? thanks a lot!
Electronics Forum | Tue Jun 25 23:03:07 EDT 2019 | pcbjhycom
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Electronics Forum | Sat Jan 23 15:19:45 EST 1999 | Earl Moon
| Could anyone send me equations to calculate controlled impedance of traces on circuit boards. I am most interested in the buried traces in multi layer boards. | | Thanks, | David - piengr@verinet.com | As one of the first MLB impedance folks on
Electronics Forum | Fri Mar 02 07:58:38 EST 2007 | samir
Ohm's law in action! :-) Thanks for the EE refresher.
Electronics Forum | Tue Jun 25 23:07:34 EDT 2019 | pcbjhycom
https://www.pcbjhy.com/impedance-control-pcb/56705887.html
Electronics Forum | Mon Feb 18 15:20:43 EST 2008 | kennyg
A PCBA contains a couple of parts that are not sealed and can't be water washed. We hand solder these with no-clean after everything else is water washed. The designer says the no-clean residue must be completely removed so that it will not affect
