Hi, I am new to PCB Layout. I am looking for a MUX component that can select between 2 voltages: 10V and 40V I am doing this using: 74LS153 component but do...
... I suggest he doesn't. His question actualy has nothing to do with FreePCB and the forums there don't need the clutter. ... No, like you say, the LS153 is...
Thanks for the feedback Phil, I am actually taking a 32 bit digital input signal and comparing it 2 bits at a time and outputting a DC voltage levels of 0V,...
... This is better, but still not enough to finish the job. What is the 0, 20 or 40 volts going to? That is, how much current will have to drive the load?...
I agree. To finish a design much more information is required. Also, how fast is it supposed to respond, how accurate is the output voltage required to be, can...
Hi Phil, I looked up Maxim Device it might do the trick. I have an industrial based machine which switches between 2 voltage 20V and 40V based on a 32 bit...
I am checking the gerber plot files and I don't completely understand everything I am seeing. Some of this may be due to the tool I am using to view the...
I found the answer to my second question about the panel size. This was not FreePCB at all, but set in GCPreview. The first question about the selection of...
Rick, The Gerber data format is the product of a long evolution. It was originally developed in the late 70's and early 80's by a division of the Gerber...
I am using a flood fill on two layers of my board to increase the plane surface area. There are a few areas that were isolated by the traces on those layers....
Rick, In general the one pin via part is the easy answer but you only need to add one if you do not already have a through hole pin in and attached to the...
... to add ... the solid ... pin that ... end via to ... hit F4 to ... to add ... you like. Thanks for the suggestion. That is the problem. The vias aren't in...
Rick, The layer I was refering to adding the trace to was the "full plane" layer you mentioned earlier; I assumed that that area was a solid, unbroken plane. ...
Just tried importing a netlist with the net names in the same format as the FreePCB default. There were also gaps in the sequence. Adding new nets using...
I am designing a rather crowded board and have little room for the reference designators. I was making the font size very small and I was concerned that the...
I am using 1 mm (~40 mil) height and 7 mil stroke. I have seen fab houses that don't guarantee silkscreen lines below 10 mil, so I wanted to go with 10 mil,...
I got some positive results, but can't post them to the FreePCB site. The forum seems to be down again. I was having problems getting output from Bruce's...
I am not having much luck with panelization. The program produces a correct file ok. But it doesn't have a way to include panel level fiducials or account...
I made a post in the FreePCB user forum and got an excellent reply from Bruce. But when I composed my reply to him, the forum decided it would not accept my...
This weekend I used FpcROUTE on two 4 by 6 inch boards. One of them has 115 through hole parts the other 146 through hole parts and two surface mount parts....
I don't have a problem with creating new parts. Faily easy after a little practice. sgsawant will have to say what he/she wants. I do prefer to use the...
I just got an email from my board vendor who said my step and repeat had a discrepancy between the gerber files and the drill file. Seems that the two are...
... Oh, I almost forgot. I didn't catch this error because GC Preview only displays one copy of the board when the gerber file specifies step and repeat....
I was bitten by the "forbidden" page again! I have to remember to copy the text of my posts before I hit the button! I tried five times to post to the FreePCB...
sorry if newb question... is there anyway of creating a freepcb library out of a eagle library. some converter or something. Sparkfun.com provides a library...
Had a look at the Eagle library format after exporting as a *.scr file. It looks theoretically possible to do a conversion of the footprint sections to be...
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