Electronics Computer-Aided Design

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Geda/ngspice scr model lacking

Does anybody know how to get a SCR model in Geda/ngspice? I want to model forced commutation circuits since I don't rea...
0 comments posted 15yrs
posted by alexis.happyphoenix
0 comments posted 15yrs posted by alexis.happyphoenix

Punch-down Block Wire Gauge

What is the standard wire gauge used for telephone style punch-down blocks? I'm guessing #22 solid, but I have nothing...
12 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
12 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

New 555 Spice Model

Got annoyed at the flaky 555 models that are out there, so I rolled my own... http://www.analog-innovations.com/SED/MyL...
15 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
15 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

Pulse Stretcher

I need a 10 SECOND pulse stretcher! I vaguely recall doing that using a counter, but can't recall the details. ...Jim T...
29 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
29 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

Logic Question

An XOR is a convenient structure to allow a control signal to invert or non-invert another signal. Trouble is (as class...
50 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
50 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

New Spice simulation community

Hi, we are creating a community of electronic design and simulation for users of different types of SPICE, PSpice, LTsp...
0 comments posted 15yrs
posted by studio21hundred
0 comments posted 15yrs posted by studio21hundred

Parts Bin

Finally got around to re-indexing my G-job parts bin (lost the piece of paper a few years ago ;-) ..... http://www.anal...
7 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
7 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

Inexpensive airlift pump

I've been working on schematics for a new project, but came across a problem. Does anyone know how to make an inexpensi...
0 comments posted 15yrs
posted by cawehking
0 comments posted 15yrs posted by cawehking

Piezo capacitance

Anyone have good guess for the capacitance of a 1" diameter piezo disk? Likewise, how much capacitance in around 100' o...
11 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
11 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

RJ11 Jack, Panel-mount, ROUND HOLE

RJ11 Jack, Panel-mount, ROUND HOLE Does such a thing exist? I'm not much good at cutting square holes in panels ;-) ......
73 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
73 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

Flex PCB questions

Hi Group, I am in design process of a 12 layer board. This is first time i need to design embedded flex pcb for my desi...
7 comments posted 15yrs
posted by asimlink
7 comments posted 15yrs posted by asimlink

Digital Synchronization Question

Digital Guys, Please refresh my mind as to bringing in an unsynchronized signal into a system without incurring meta-st...
10 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
10 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

DP3T Switch?

I can't seem to locate a DP3T switch, toggle or slide that has ON-ON-ON All I can find is ON-OFF-ON types :-( Can someo...
29 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
29 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon

Quiet a Piezo Transducer

In a typical piezo (noise maker) transducer, will a series R knock down the amplitude? ...Jim Thompson -- | James E.Tho...
8 comments posted 15yrs
posted by To-Email-Use-The-Envelope-Icon
8 comments posted 15yrs posted by To-Email-Use-The-Envelope-Icon