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In this layout, I was more concerned with reducing loop area inductance than I was with the ground loop associated with the drop across the ground plane. I can’t see why anything should happen if all the FETs are inactive when you plug the motor in and stay that way as they should. Anyway, I’ve been making do with what I’ve got around the house for now.

Next, I plug in the IR, as shown in the schematic, and again it behaves as you’d expect. The idea was to datasneet it running adequately – to allow me to lay a PCB out confidently, knowing the breadboard works – and take care of the grounding issues at the PCB stage.

Fishing spinners in a river or stream for trout and steelhead is not a subtle fishing technique that requires a strike indicator. As well it killed 2 outputs lines on the PIC. Thanks again for your help. I’m thinking about adding in some diodes in between the PIC outputs and irf4l310 IRs to block any reverse current.

IRFL – Infineon Technologies

It’s not that I haven’t been cognizant about it up to this point, I just hadn’t expected such a large problem. Spinner fishing steelhead salmon trends: Or something else I do a lot is only test one or two phases at a time by playing with the source code – this way you are reducing the amount of things you are trying out for the first time and all at once.

Prime Time Steelhead; Lake St. What am I missing? If the current is somehow flowing back into the PIC that way, that should block it. But in the meantime, I’ll be finishing up the design then the layout.

To monitor the phases, I just use a bank of LEDs – which works just fine, and actually is more informative for what I’m doing that a dual channel scope. No problem – I’m an engineer, and if the design isn’t verified, then by definition it is defective. Last edited by wrobinson on Aug 09 2: Has anyone encountered anything like this before, or anyone have any insight as to what might be going on.


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I cobbled that schematic together really quickly yesterday morning before I made the post. They are on my dqtasheet, I just left them off the schematic for now, it’s a work in progress This is the most in depth writing about this subject that I have ever found. The only difference being that I’ve modified the driver stage to use the IR Mosfet drivers.

I put in some diodes inline with the PIC outputs, and fired up the motor. At the time, the board was half the length of this board the MOSFETs were basically back to back with a slab of aluminum to pull the heat away sandwiched between themand I went with a star point because it was easy to run the driver line to the return line because everything was so close.

Everything works as expected in that when I’ve got my hall sensors plugged into the PIC microcontroller, the right control lines toggle at the output pins of the chip. Fishing spinners slow in river current causes the blade to pulse and throb sending an irfll4310 vibration to trout, steelhead and salmon. And if anyone has any other ideas as to what was going on, please chime in! Anyway, thanks again for the replies, any other ideas would be a real help.

Make sure the bootstrap diodes aren’t blown. Do I have orfl4310 right part? Up to that point, I had just been going with hand drawn schematics, and when posting the question, I wanted to have something a little nicer to refer to.

IRFL4310 MOSFET. Datasheet pdf. Equivalent

Find three hefty resistors maybe around 10ohms or so, along with some good sized inductors to go with them around uH or soand use them instead of your motor to do tests. After that, I plug in the MOSFET board, and apply 36V to it – but it isn’t plugged into the bike just yet, and it at this point, it seems that everything is still fine. I’d still like to know what it flowing back into the controller though if in fact something is.


The one that I’m designing is based directly on one by Microchip http: You do not have the required permissions to view the files attached to this post.

Any feedback would be appreciated! I’d have expected the IRs to act as a buffer, but alas that doesn’t seem to be the case The only other thing is the datasheet shows a capacitor across Vcc to Com, but that shouldn’t be blowing the PIC lines.

Please click button to get spinner fishing for trout book now. Now, I have NOT plugged the motor in yet.

I should have mentioned If so, you are going to be disappointed with the torque from your controller. The title is a bit deceiving, however, as the book focuses mainly datashert steelhead with comparatively less information pertaining to trout and salmon.

I’m actually in between oscilloscopes. Do you have a scope to check the signals to be sure? I’m sure you know the drill. Thanks again for the feedback, and hopefully as this project matures, you’ll continue to irfll4310 in along the way!

We own Spinner Fishing for Steelhead, Salmon, and Trout PDF The title is a bit deceiving, however, as the book focuses mainly on steelhead with comparatively less information pertaining to trout and salmon. We were having a yardsale last summer, and with 2 little kids ifl4310 toe, and no big projects on the horizon, I decided to let go of my 20 MHz scope, and start looking out for a nicer one – digital storage type deal, Mhz or so. OK, to krfl4310 a step back and answer the questions from earlier That being said the information given on spinner fishing for trout is very well thought out and very applicable.

Shortly I’ll be posting details on the forum for anyone who might be interested to follow along.