rusefi.com

I haven't looked at the boards thoroughly, but the USB differential pairs need some work. And I don't recommend having 2 USB connectors in series. Those extra stubs can cause reflections. Another important thing for diff.pair is parallelism. Although you are not using High Speed, it is still a good ...

Notes on how to use the board. Vc = Voltage of the controller side of the translator. This is located next to PD10 so you can use the IO as the 'enable.' 'Strong' driving PD10 high will act as the pull up and the enable signal. Strong driving PD10 low will disable the inputs. Or just connect Vc to y...

https://github.com/DanMoto/Stimulator Good stuff! I've just ordered the board @ Oshpark Nice silkscreen job. Whoa, that was quick on ordering! :D Just because I am a member of the meticulousness club, here are some comments: 1) my KiCad BZR 4022-stable on Windows does not open the .kicad_pcb file b...

Fully routed and labeled.

https://github.com/DanMoto/Stimulator

This really sucks! The software was actually quite good. Although I don't rely on it 100%, the software allows me to get better visuals on routing and shows me new paths that I may not have seen. It has definitely save me times. It is a sad day now that it is gone. :( Anyone know a alternative?

I put extra header pins for each input so that you can jump it to the IO of your choice, which makes routing easier too. So the option is already there. Only 1 out of the 4 voltage translators is connected to a discovery input (PA8). The rest are unconnected. The reason for reducing to only 4 transl...

Redid the schematic and layout to what you originally wanted. Check it out. I haven't route or did the reference designators or labels yet.

https://github.com/DanMoto/Stimulator

I think the discovery can do both feature if there is additional DMAs left. I haven't check the code yet. The way you trigger the outputs is to create a table and output them via DMA in a loop. You can have a 8 bit waveform generator to simulate any cam/crank profiles. Changing the frequency of the ...

Just ran into this project. Check it out. This guy did a 20MHz logic analyzer firmware for the discovery. 5MHz with run-length encoding mode, which is PLENTY for our purpose. https://code.google.com/p/logicdiscovery/ This is similar to the implementation I mentioned early. Now if we add digipot and ...

You just need to connect the 2 row of sockets to the board or a header first before you solder. Easy alignment

There are cheaper alternatives for tall sockets. Just double these up. It maybe a bit cheesy, but it will work fine. And it gives you some place to clip to each pin if needed. Like these: http://www.ebay.com/itm/20pcs-10Pin-Female-tall-stackable-Header-Connector-socket-for-Arduino-Shield-268-/181341...

The problem was that I don't know which pins to route for inputs since you only provided 1 (input #1 PA8). If that's the only pin you need/want, then that's easy. I can just pick the remaining pins for best routing. But I am just trying to see if you might use the remaining pins in the future so I c...

Lets say we have 16 inputs and I map them all on the same port. A single interrupt can be generated by any of those 16 input. With a single timer, you will capture both the state of the pins and the capture time. Then, save the time and port as a single sample. If the timer reach terminal count, you...

Russian, so after thinking over this again during my off time, I have convinced myself each input pin do not need a dedicated timer. Instead, I would just route the input pins to a single port. That way you can use a single timer to capture the entire port on any changes. Also is it possible to use ...

Yes, alot has to do with routing too, making sure that energy doesn't transfer to neighboring signals and making sure that it return to the external. But the 200pF is what protects the MOSFET. This circuit is actually been tested. During an ESD event, the 200pF is a short and it will transfer most o...

The main purpose of 2n7002 is served as a versatile general purpose IO voltage translator. For more details, it is a variation of the circuit in this thread: http://rusefi.com/forum/viewtopic.php?f=4&t=529#p7815 @Russian, I choose to not have it mounted on the discover is because of routing simp...

This circuit is now "Versatile Level shifted IO - Sudo" @Russian, change the topic if you can. VIO.png The reasoning for this circuit is to provide is versatile general purpose level shifted IO with optional ESD protection. This circuit can be used in various modes. Common points: 1. The m...

Check it out.

https://github.com/DanMoto/Stimulator

Ok. I will work up something for you next time I get a chance. It should be pretty straight forward.

Ok, I get the idea of what you want. You basically want a 2"x1" mini shield with (2)10x2 socket headers, and as much digipots, inputs, and 5.08 terminals I can fit on it. All other features will be handled by Frankenstein and/or external modules.

Ok, maybe I am making this a bigger board than it needs to be. The reasoning for that is because I feel if we are going to make a shield that's dedicated for automated stimulation, we might as well use up more IOs and make it more versatile as possible. However, we can certainly put this full versio...

Welcome!

Finally have some time to assign some preliminary pins. Let me know if any of these IO is a problem. Updated schematic as well. Inputs with timer: PA1 Timer2 PA0 Timer5 PA2 Timer9 PA7 Timer14 PA6 Timer13* (must remove MEMS to use) PB1 Timer3 PE9 Timer1 PB14 Timer12 PB8 Timer10 PB9 Timer11 PB7 Timer4...

I thought this is a good concept. It seems to be useful for kicad once they get all the bug fix. They deserve a lot of credit for their work so far.

http://WWW.circuithub.com

It seem with an oscope and signal generator, it would be easy. See http://daycounter.com/Articles/How-To-Measure-Inductance.phtml Something like the DSO quad seems like it would work. It seems something is missing with the method in the link. It would make more sense to include the DC resistance of ...

@russian, I won't even bother with my CB600F connector and I will most likely redo the whole harness. But I am more interested in the connector you already have, which is the TE 176122-6 (Honda OBD1 ECU). I also have a spare Honda OBD1 ECU that I will be using for my tests. I don't mind the OBD2 tha...

This caught my eye, looks like they can work around qty 100. http://au.alibaba.com/product/1550819734-engine-harness.html Thats the same person I tried to contact. They have all different connectors as well. Never heard back. :? http://kinkong.en.alibaba.com/productgrouplist-219252471/Wire_Harness....

From my experience, the 2N7002 (non K) version is pretty easy to get ESD damage. That's why I choose the 2N7002K with gate-source ESD protection. Your method of adding the resistor and diode is what I would normally use. But in this case, I would use a 16V zener since Vgs can be +/-20V. That way I c...

puff did pointed out a problem that may occur. Nonetheless, the circuit can be remedied further by adding a resistor and clamping diode to the gate, since the gate is already protected with ESD diodes but not over voltage protected. But that somewhat defeats my goal, which was simplicity. However, ...

I suppose it can.