[MudderFudder]

Monniepoo is flying high! I'm tracking her flight progress.

[82-SOA-60]

Originally Posted by rusty_tlc

Never diddle a married woman.

Coo cooo cachooo Mrs. Robinson

[rusty_tlc]

Originally Posted by Bogo

It needs to be built on a copper cored PCB for heat dissipation. AL core isn't quite good enough. I literally make a PCB with a copper core. The core handles coil power + and - as well as being the primary heat conductor. Great for heat dissipation, bitch to make. I'm not sure I could have somebody else make them due to cost.

I have a board mill here at work, I could run small jobs for you.

[Bogo]

Originally Posted by rusty_tlc

Sounds like a job for a programmable device. What processor would you use?

My first design used a Motorola part. Now, I don't know. (I was forgetting the full extent of the ADC conversion rate needed. I did the initial design 7+ years ago and need to modernize it for hardware advances.) I need at least 8 very high speed ADC channels that operate in parallel. PWM generation is done with the DSP so they need to be real fast as my coils are very very low inductance. I'm looking at possibilities. I'm wondering if I have to off load the PWM generation to other hardware. I need fast simultaneous sampling to make the position math easy and quick to process. Most DSP ADCs can't do the simultaneous sampling on that many circuits. I could use 8 1mHz ADCs and pipe the data into a FPGA with logic to do the PWM and then send ADC data on to the DSP for slope calculation. One DSP could handle many coil sets as the positioning only needs to be done around 1000 times a second. It is the PWM channel generation that takes up most of the CPU cycles. All of that is simple compares. The Motorola part had hardware to do that work. I bet there are others that do now as it is a requirement for some motor types. It is just a question if they can do the ADC work simultaneously. That makes the position determination math much easier. Almost easy enough to be coded into a FPGA.

[Bogo]

Originally Posted by rusty_tlc

IMHO reality is over rated.

I agree, but my brain resists all attempts are substituting something else in it's place.

[82-SOA-60]

Originally Posted by MudderFudder

Monniepoo is flying high! I'm tracking her flight progress.

Sweet! Thats cool!

[Bogo]

Broke yet another wal-mart shoe lace.

[rusty_tlc]

Originally Posted by Bogo

Broke yet another wal-mart shoe lace.

Parachute cord.

[rusty_tlc]

New Av

[rusty_tlc]

Originally Posted by Bogo

I agree, but my brain resists all attempts are substituting something else in it's place.

Dam your stubborn brain!

[rusty_tlc]

Originally Posted by Bogo

My first design used a Motorola part. Now, I don't know. (I was forgetting the full extent of the ADC conversion rate needed. I did the initial design 7+ years ago and need to modernize it for hardware advances.) I need at least 8 very high speed ADC channels that operate in parallel. PWM generation is done with the DSP so they need to be real fast as my coils are very very low inductance. I'm looking at possibilities. I'm wondering if I have to off load the PWM generation to other hardware. I need fast simultaneous sampling to make the position math easy and quick to process. Most DSP ADCs can't do the simultaneous sampling on that many circuits. I could use 8 1mHz ADCs and pipe the data into a FPGA with logic to do the PWM and then send ADC data on to the DSP for slope calculation. One DSP could handle many coil sets as the positioning only needs to be done around 1000 times a second. It is the PWM channel generation that takes up most of the CPU cycles. All of that is simple compares. The Motorola part had hardware to do that work. I bet there are others that do now as it is a requirement for some motor types. It is just a question if they can do the ADC work simultaneously. That makes the position determination math much easier. Almost easy enough to be coded into a FPGA.

I was just checking the CEL site, not much that you could use in your project except some RF SSR's.

[Bogo]

Originally Posted by Bogo

My first design used a Motorola part. Now, I don't know. (I was forgetting the full extent of the ADC conversion rate needed. I did the initial design 7+ years ago and need to modernize it for hardware advances.) I need at least 8 very high speed ADC channels that operate in parallel. PWM generation is done with the DSP so they need to be real fast as my coils are very very low inductance. I'm looking at possibilities. I'm wondering if I have to off load the PWM generation to other hardware. I need fast simultaneous sampling to make the position math easy and quick to process. Most DSP ADCs can't do the simultaneous sampling on that many circuits. I could use 8 1mHz ADCs and pipe the data into a FPGA with logic to do the PWM and then send ADC data on to the DSP for slope calculation. One DSP could handle many coil sets as the positioning only needs to be done around 1000 times a second. It is the PWM channel generation that takes up most of the CPU cycles. All of that is simple compares. The Motorola part had hardware to do that work. I bet there are others that do now as it is a requirement for some motor types. It is just a question if they can do the ADC work simultaneously. That makes the position determination math much easier. Almost easy enough to be coded into a FPGA.

I think I may look seriously into a doing it the PWM with a FPGA. Xilinx has been increasing the capabilities of the stuff that is programmable with their free development kits. Then I could pipe the timing data via optical link to a bought controller board. Then send the PWM control data back via the optical link. That means I don't have to electromagnetically protect a DSP near the coils. I can have it far enough away it doesn't matter.

[stinkyfj60]

So me and the girls go out to catch some frogs again. For some reason we didn't see a lot. Until this:

[rusty_tlc]

Originally Posted by rusty_tlc

I was just checking the CEL site, not much that you could use in your project except some RF SSR's.

I can probably get samples from other Mfg.'s if you need them. Working for an electronics company opens up a whole world of free stuff. Let me know.

[semlin]

Originally Posted by MudderFudder

Monniepoo is flying high! I'm tracking her flight progress.

she finally visited moab

but that pilot appears to be drunk

[semlin]

can tut help me choose a nice gas powered weedthwacker? I needs one bad.

needs to be light enough for mrs semlin to wield

[stinkyfj60]

Originally Posted by rusty_tlc

Never diddle a married woman.

[semlin]

Originally Posted by semlin

she finally visited moab

but that pilot appears to be drunk

or maybe he wanted to buzz Cdan on lake powell??

[rusty_tlc]

Mojo rising

[rusty_tlc]

Originally Posted by 82-SOA-60

Coo cooo cachooo Mrs. Robinson

She was hawt.

[gladly]

Originally Posted by Mickldo

Last night I had to go out and have a look at a trailer that had an electrical fault with the electric brakes. Apparently the brakes were locked and I just had free them up and tow this trailer 20km back into town.

I took all my tools out there to fix this electrical problem but when I got there I figured what the electrical problem was.

The U bolts hadn't been done up tight enough and the axle had rotated around when the brakes had been applied, snapping off the leaf spring centre bolt, jamming the tyre into the wheel arch, and wrapping the handbrake cable and brake wires around the axle.

We had to call a tilt tray tow truck to retrieve it.

The trailer wasn't one of ours, it was one of the boss's mates that he was doing a favour for. Good to see the correct information was passed onto us and we wasted an evening doing something the driver of the truck that was towing the trailer could've organised by himself 24hrs earlier on his mobile phone. All as a favour

[rusty_tlc]

Originally Posted by semlin

can tut help me choose a nice gas powered weedthwacker? I needs one bad.

needs to be light enough for mrs semlin to wield

Get an MTD or one they label for someone else. They are cheap. I have an MTD, labeled Troy built, that I have kept running for years. Worst I had to do was replace the carb because the primer pump wears out and it is intergal to the carb. Good availability of spare parts, nice on-line catalog and ordering.

[MudderFudder]

.....

[grrlscout89FJ62]

Originally Posted by grrlscout89FJ62

Actually I guess it's just phpMyAdmin help. I've never used it before.

Alrighty. Well, I'm just gonna go for it.

Wish me luck!

[rusty_tlc]

Wham damn diddy.

[rusty_tlc]

Originally Posted by grrlscout89FJ62

Alrighty. Well, I'm just gonna go for it.

Wish me luck!

Luck!

[gladly]

Originally Posted by semlin

can tut help me choose a nice gas powered weedthwacker? I needs one bad.

needs to be light enough for mrs semlin to wield

I think that you can get a new weed eater at CT for 70 bux

[rusty_tlc]

Some people should not be allowed to use a computer.

[82-SOA-60]

Originally Posted by MudderFudder

.....

18 hours till I leave....esh.

[surfpig]

Originally Posted by stinkyfj60

Wild Thing!