Hello,
I want to make a part with 2 choices for the schematic svg image.
First, is this even possible?
Second, how do you go about doing this. It seems that some parts
have choices available for the pcb layout, such as through hole or smd.
Can this be done for the schematic symbol?
Thanks.
Unfortunatly no (AFAIK), the parts that change in inspector are two different parts with magic in the fzp file to tap in to code in the core bins to change attributes (and then only some attributes). You would need to make two different parts one with each schematic and then if there is a suitable attribute we can tell you how to modify the fzp file to make core think your part is blessed and let inspector change the attributes.
Peter
Where is the Reply Toolbar?
Can you see those faded icon above the text box.
Where in the inspector do I change the PCB to single side? I cant find a reference to it in the inspector.
I changed my Operating system recently to Ubuntu Linux and not sure where I can find the file.
I can run Fritzing and use it fine but don't know how to copy my layout and attach it to the user group.
Please let me know if this works.
Audio Listening V2 _pcb.jpg
Click on the PCB edge so that it is highlighted with a box, then in Inspector around the middle it says double sided. Change that.
Is there an easy way to get a 60V sq wave from a 5V digital signal.
I've got a DIY car ECU that outputs a digital 5V tach signal, the problem is that my tach uses the high voltage coil flyback as a signal and won't trigger off that.
Currently I have a MOSFET switching a relay with the contact bar removed - too noisy otherwise - , and it's the flyback off that that makes the tach work.
I don't know much about actual electronics, but is there any simple ideas I could research. I don't really know what to search for because I know nothing.
Thanks for the tip Old_Grey! I'll keep that in mind.
The circuit is the easy part, an npn transistor such as the 2n5551 (160V breakdown) will do it. The input is a resistor from your 5V output port to the base with the emitter on ground. A largish (10K to 50K because you don't need much current) resistor to a 60v supply on the collector gives you your 60v output. The hard part is a boost regulator to get 5v to 60V. Most of the ebay cheapies are limited to about 30v ouptut. If you can find a cheap one that will do 60v with at 5V input you will be away. I'd be tempted to try it with 30V on the collector from one of the cheap inverters or an external 30v supply and if that works use one of the 3 or 3 dollar inverters from ebay.
edit: found at least one:
its a little large and would need to run of the 12 v supply but it is reasonably cheap way more current than you need as well (which is why so large).
Peter
I am not an EE so what I have to say may be the hard way of doing things but if I needed to do what you are saying I would consider building a HV power supply using a PWM chip with an inductor and large smoothing cap. Then use your transistor to convert the 5V pulses to 60V.
Here is an example of a simple HV power supply made with all through hole components. http://www.smbaker.com/high-voltage-power-supply
If you want to buy a tiny one you can search on eBay for Nixie power supply (My collection). With the nixie ones they will be set to around 170V but it is usually easy to switch the reference resistor to get lower voltages from them. I use tiny transformer based ones like this.
I was just think about a boost converter and switching with a MOSFET.
This is what the working relay and MOSFET are producing, but I don't know how low I can go.
I have some SEPICs 45V Buck-Boost around here, so I might try that first.
Yeah it's a bit of a trap because things don't auto connect just because they are touching.
A simple voltage divider such as a 50k or 100k (so it draws little current) pot with the input signal to the top and the wiper to the tach trigger input should let you adjust the voltage to the tach until it reads dependably. That in turn will tell you the minimum voltage you can get away with. Another option I just thought of is a 12 v to 120V power transformer. If you switch the 12v side with 5v you will get around 60v on the 120V secondary side. It probably won't go that fast though not more than 120 hz or so I don't think, so you may need to use an audio transformer if you need a couple of khz (which you may for 5000 rpm or so) and finding the turns ratio you need is a bit more complex.
edit: this may do the trick:
at 1:25 about 3V in would give 75V out, so you would probably need a resistor voltage divider on the input to reduce the 5V signal enough to give you the 60v output you need something like 2 1k resistors in series should give about 2.5v at the center of the resistors (or a 2k pot so you can adjust the output voltage) to connect to the input of the transformer and thus 62v out on the output. This is probably the cheapest and smallest solution. It should work up to 5khz or so perhaps more.
Peter
Thank you Peter. Actually, I don't want to bother you with something I should be able to do ... so I figured it out by myself. Attached is my completed part. (only the schematic view has a slight flaw -- the viewport).
I hand-edited the svg ... because whenever I went into Inkscape, it would really screw up the svg file.
Attached is my completed part.
Also, here is my dip-switch-04 used; First the BREADBOARD view:
The Schematic view:'
And the PCB view:
-Allan
DIP Switch 4 Position.fzpz (13.1 KB)
@vanepp Sorry I was busy the last days but now I found the time to look at the fixed part.
I made actual versions of the coloured parts and now they work. Thanks a lot for the help here from all 
HSMA-A431-XXXXX.fzpz (11.6 KB)
HSMC-A431-XXXXX.fzpz (10.6 KB)
HSMJ-A431-XXXXX.fzpz (10.5 KB)
HSML-A431-XXXXX.fzpz (10.5 KB)
HSMN-A431-XXXXX.fzpz (10.5 KB)
HSMM-A431-XXXXX.fzpz (10.5 KB)
Just a beginner of fritzing user. I made my first PCB with fritzing a month ago and other two PCBs are under process. I have one difficult thing for using the program. When I have a real item such as 2x20 female pin header (Similar to the one on RPI 3) but I don't know how to find it in Fritzing. Do I need to use two of 10 female pin header.
If you search the word generic in Fritzing you will find a generic female header. Once you drag that out on to your PCB/Schematic/Breadboard you can then change the "row" to 2 in the inspector and then set the pin count in the inspector as well.
That appears to be broken at present, so indeed either finding a project (such as on of the PI parts) with the size of connector you want and exporting the part from there or two single headers are your best bet.
Peter
