Search found 568 matches

by Mrxyz
Fri Feb 16, 2018 4:25 am
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

Update: Could not find a potentiometer. Could not find battery pack of NimH which do not exceed 9V. Smallest I found was 4 V (4 cell). And yes, I am not allowed to open the pack and rewire them. So, I could use two 4 V batteries but half speed is too slow. So used baffles (black and orange colored v...
by Mrxyz
Wed Feb 14, 2018 7:24 am
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

It appears that the rheostat is to be adjusted to a single value and left there. If that is the case once he knows the resistance that is needed the rheostat can be replaced by a fixed resistor or resistors. That might allow greater design flexibility, since fixed resistors are usually smaller and ...
by Mrxyz
Wed Feb 14, 2018 7:20 am
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

Just thought of another approach. For learning, here are a couple of questions to pose to your son: I understand the rules allow contact with the sides of the track. Is there a way that can be used deliberately to control the speed? Do you know how the track is designed? If so, what features could ...
by Mrxyz
Tue Feb 13, 2018 12:51 am
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

I'm guessing he's making the hovercraft. Here's the relevant rule: Electrical components shall be limited to batteries, wires, motors, switches, resistors, potentiometers, capacitors, mechanical relays, fans, and blowers. Brushless motors and integrated circuits are not permitted unless they are an...
by Mrxyz
Mon Feb 12, 2018 2:15 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

The OP has already said that the competition rules don't allow for use of efficient controllers. I can only think that the competition must be to see who can toast marshmallows the fastest while simultaneously reducing the speed of the motor. Fair point - but maybe knowing what that motor was desig...
by Mrxyz
Sun Feb 11, 2018 6:24 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

I (and others) would be curious to know the reason for the requirements. Nonetheless, this part, while not cheap at $76, should do the job: https://www.digikey.com/product-detail/en/ohmite/RJS6R0E/RJS6R0E-ND/824085 Note - this is a 6 ohm part. I would have chosen a 2 ohm, but the lead time is 16 we...
by Mrxyz
Sun Feb 11, 2018 4:58 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

I'm not an EE but i have taught electronics to college students.... IMO you will NOT find a potentiometer to put in line with your motor that will do the job. Inevitably, the 'pot' would need to dissipate almost as much energy/heat as the motor unless it was at 100% speed. One way to do this would ...
by Mrxyz
Sun Feb 11, 2018 4:57 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

You don't want to just waste the battery capacity in a linear solution (potentiometer directly hooked to motor or through a transisitor or FET). You want something that won't be dissipative. One way that you said won't work is PWM. For this, the voltage from the battery pack is turned on/off at hig...
by Mrxyz
Sun Feb 11, 2018 4:54 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

Silverado wrote:
Sun Feb 11, 2018 8:22 am
Curious about why you can't use pwm?

No matter what, the heat dissipation is going to be important.
Hi all,
Thanks for your replies.

The motor and circuit have rules which prohibit a pwm.
by Mrxyz
Sat Feb 10, 2018 8:58 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

oldcomputerguy wrote:
Sat Feb 10, 2018 8:20 pm
Can you provide specs of the motor? Kinda hard to make a recommendation without them.
I have updated my post.
Thanks
by Mrxyz
Sat Feb 10, 2018 8:57 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Re: Potentiometer for motor speed control- any electrical engineers around?

Hi Perhaps someone with electrical background may be able to help ! So I have a motor which is connected to a propeller whose speed needs to be controlled. So I need an on off and variable speed control. I was 'told' to use a potentiometer but what I bought from eBay burnt out. I cannot use a PWM -...
by Mrxyz
Sat Feb 10, 2018 8:11 pm
Forum: Personal Consumer Issues
Topic: Potentiometer for motor speed control- any electrical engineers around?
Replies: 40
Views: 2343

Potentiometer for motor speed control- any electrical engineers around?

Hi Perhaps someone with electrical background may be able to help ! So I have a motor which is connected to a propeller whose speed needs to be controlled. So I need an on off and variable speed control. I was 'told' to use a potentiometer but what I bought from eBay burnt out. I cannot use a PWM - ...
by Mrxyz
Mon Feb 05, 2018 12:18 am
Forum: Personal Consumer Issues
Topic: Flaunt Your High-Mileage Car
Replies: 374
Views: 45423

Re: Flaunt Your High-Mileage Car

141,000 miles, bought new on June 4th 2007. Driven year-round in upstate NY. https://www.cobaltss.net/forums/attachments/general-cobalt-68/10282d1493773963-what-have-you-done-your-cobalt-today-photo645.jpg Very nice ! Cute, pretty.............. Do you think you need to probably update the garage (?...
by Mrxyz
Mon Jan 22, 2018 3:54 pm
Forum: Personal Consumer Issues
Topic: Laughter is the Best Medicine - What makes you Laugh?
Replies: 105
Views: 5579

Re: Laughter is the Best Medicine - What makes you Laugh?

Anyone for British humor???

Chef series - Lenny Henry
Only fools and horses.................etc.
by Mrxyz
Wed Jan 10, 2018 3:30 pm
Forum: Investing - Help with Personal Investments
Topic: What would you do with a 25 million windfall?
Replies: 47
Views: 2939

Re: What would you do with a 25 million windfall?

What would you do with a 25 million windfall? Btw I’ve read the wiki for it and appeeciate the input. Hi, You may to format your question with more specifics like why are you asking, what is your background financial status -debts, net worth, life goals, bucket list, etc? Also, would help if you pl...
by Mrxyz
Tue Jan 09, 2018 9:33 pm
Forum: Personal Finance (Not Investing)
Topic: When the rubber hits the road [Progressive Dementia thread with merged updates]
Replies: 106
Views: 8069

Re: The reality hits - my dementia update

Thanks for sharing such a touching story!
Wish you all the best.
by Mrxyz
Wed Jan 03, 2018 12:53 am
Forum: Personal Consumer Issues
Topic: Water filtration system - worth it?
Replies: 37
Views: 2798

Re: Water filtration system - worth it?

Is there any health concern if minerals are removed by such filtration? Of course, if the water is obviously bad to begin with like foul smell or off color... but what if the tap water is as clean as the city can provide? Thanks Sorry about quoting myself here.....but I am quite confused about all ...
by Mrxyz
Sun Dec 17, 2017 1:17 pm
Forum: Investing - Theory, News & General
Topic: Any of you trade just a little as a hobby?
Replies: 64
Views: 6233

Re: Any of you trade just a little as a hobby?

Many many years ago, I thought I knew about trading/buying/selling. Had an etrade account to do it. Made around $2500. And then got out realizing that I am an idiot doing it. I can say I was 'playing with my kids money' ! Boglehead since then and have not looked back. Nothing, repeat, nothing is wor...
by Mrxyz
Wed Dec 13, 2017 10:41 pm
Forum: Personal Consumer Issues
Topic: Honda Pilot vs Toyota Highlander?
Replies: 88
Views: 18132

Re: Honda Pilot vs Toyota Highlander?

A bit of info worth sharing on the PIlot. My brother purchased a new 2017 Pilot Touring (45 miles on the odometer) with the 9 speed transmission. No joke, on the way home from the dealership, something went wrong with the transmission. The transmission shifted into neutral while driving on the free...
by Mrxyz
Sun Dec 10, 2017 12:58 pm
Forum: Personal Consumer Issues
Topic: Honda Pilot vs Toyota Highlander?
Replies: 88
Views: 18132

Re: Honda Pilot vs Toyota Highlander?

In December 2016 ago we replaced an old Ford Explorer with a '17 Pilot. We chose the Pilot over the Highlander because we liked the feel of the engine/transmission better and, more importantly, we liked the third row legroom (great for three adult couples as well as just younger kids. We liked the ...
by Mrxyz
Fri Dec 01, 2017 4:07 am
Forum: Personal Consumer Issues
Topic: Water filtration system - worth it?
Replies: 37
Views: 2798

Re: Water filtration system - worth it?

Is there any health concern if minerals are removed by such filtration? Of course, if the water is obviously bad to begin with like foul smell or off color... but what if the tap water is as clean as the city can provide?
Thanks
by Mrxyz
Mon Nov 27, 2017 12:11 pm
Forum: Personal Consumer Issues
Topic: Kreg jig
Replies: 23
Views: 1856

Re: Kreg jig

Hey, it's Christmas. Get yourself a Festool Domino - https://www.festoolproducts.com/power-tools/festool-domino-joiners.html?gclid=Cj0KCQiAjO_QBRC4ARIsAD2FsXPpJW-jkZ4xRga7e3UfpoiYpz8sTX4-cXxCLKBc55h4RpLMeHk6DIgaApmcEALw_wcB Since I bought one, I hardly ever use my Krueger jig and I sold my biscuit ...
by Mrxyz
Mon Nov 27, 2017 8:54 am
Forum: Personal Consumer Issues
Topic: Kreg jig
Replies: 23
Views: 1856

Re: Kreg jig

Hey, it's Christmas. Get yourself a Festool Domino - https://www.festoolproducts.com/power-tools/festool-domino-joiners.html?gclid=Cj0KCQiAjO_QBRC4ARIsAD2FsXPpJW-jkZ4xRga7e3UfpoiYpz8sTX4-cXxCLKBc55h4RpLMeHk6DIgaApmcEALw_wcB Since I bought one, I hardly ever use my Krueger jig and I sold my biscuit ...
by Mrxyz
Sun Nov 26, 2017 2:45 pm
Forum: Personal Consumer Issues
Topic: Kreg jig
Replies: 23
Views: 1856

Re: Kreg jig

Are you talking about a pocket screw jig? Yes, I bought one from home depot - the K 4 jig and will 'try' to build a full size bed today - with some luck and mistakes!! Pocket screws for a bed? Uh, not a great idea. You want a mortise and tenon. Pocket screws will perform poorly and the bed will rac...
by Mrxyz
Sat Nov 25, 2017 2:33 pm
Forum: Personal Consumer Issues
Topic: Kreg jig
Replies: 23
Views: 1856

Re: Kreg jig

wilked wrote:
Sat Nov 25, 2017 2:15 pm
Are you talking about a pocket screw jig?
Yes, I bought one from home depot - the K 4 jig and will 'try' to build a full size bed today - with some luck and mistakes!!
by Mrxyz
Sat Nov 25, 2017 2:12 pm
Forum: Personal Consumer Issues
Topic: Kreg jig
Replies: 23
Views: 1856

Kreg jig

Hi,
Anyone use Kreg jig? Is there any other similar product which is comparable? Likes/dislikes, experiences? Any websites for learning its many uses / getting free plans etc ?
Websites other than www.kregtool.com ?

Thanks
by Mrxyz
Mon Nov 20, 2017 7:30 pm
Forum: Investing - Help with Personal Investments
Topic: Post for Livesoft
Replies: 34
Views: 5612

Re: Post for Livesoft

No, it doesn't. To see something sticky-worthy, see Robert T's post. Wow, thanks for the link........of course it will take me many months (?years) to read that sticky post and it's many links! But I still like/enjoy your posts and explanations... along with many others.... Very interesting that a ...
by Mrxyz
Mon Nov 20, 2017 7:14 pm
Forum: Investing - Help with Personal Investments
Topic: Post for Livesoft
Replies: 34
Views: 5612

Re: Post for Livesoft

No, it doesn't. To see something sticky-worthy, see Robert T's post. Wow, thanks for the link........of course it will take me many months (?years) to read that sticky post and it's many links! But I still like/enjoy your posts and explanations... along with many others.... Very interesting that a ...
by Mrxyz
Mon Nov 20, 2017 6:53 pm
Forum: Investing - Help with Personal Investments
Topic: Post for Livesoft
Replies: 34
Views: 5612

Re: Post for Livesoft

A summary of livesoft's investment philosophy!
Surely this qualifies as a sticky!
by Mrxyz
Thu Nov 16, 2017 10:47 am
Forum: Personal Consumer Issues
Topic: What do you do to keep your mind sharp?
Replies: 65
Views: 5419

Re: What do you do to keep your mind sharp?

http://en.chessbase.com/post/evaluating ... n-boosters

Some food for thought.......BTW, I love and play chess irrespective of any evidence for or against it!
by Mrxyz
Tue Nov 14, 2017 3:53 pm
Forum: Personal Consumer Issues
Topic: Home voice dictation experience
Replies: 8
Views: 793

Re: Home voice dictation experience

Hi, Due to various medical reasons (Parkinson's etc), a number of folks have asked me for advice regarding "Home voice dictation". Dragon -Nuance is one of them. Any experience in using these? Is there one which works better than others? Thanks Would you describe your end use? I tried Dragon severa...
by Mrxyz
Tue Nov 14, 2017 2:38 pm
Forum: Personal Consumer Issues
Topic: Home voice dictation experience
Replies: 8
Views: 793

Home voice dictation experience

Hi,
Due to various medical reasons (Parkinson's etc), a number of folks have asked me for advice regarding "Home voice dictation". Dragon -Nuance is one of them.
Any experience in using these? Is there one which works better than others?
Thanks
by Mrxyz
Wed Nov 08, 2017 1:36 am
Forum: Personal Consumer Issues
Topic: What do you do to keep your mind sharp?
Replies: 65
Views: 5419

Re: What do you do to keep your mind sharp?

tc101 wrote:
Wed Nov 08, 2017 1:12 am
Chess club keeps mind sharp and is also a great social outlet. The people who go to chess clubs are a strange and interesting group. It is different than playing online.
+ 64 !
by Mrxyz
Wed Nov 01, 2017 7:25 pm
Forum: Personal Consumer Issues
Topic: Honda Care Extended Warranty experience?
Replies: 53
Views: 29160

Re: Honda Care Extended Warranty experience?

Sorry to bring this thread back.... Just purchased a 2017 CRV Touring (paid cash) and I am considering buying the Honda Care warranty since this vehicle is completely new line with many electronic parts. Looks like about $1000 for 8 year 120K mile plan. I have had mixed experience with Honda, have ...
by Mrxyz
Wed Nov 01, 2017 12:20 am
Forum: Personal Consumer Issues
Topic: Honda Care Extended Warranty experience?
Replies: 53
Views: 29160

Re: Honda Care Extended Warranty experience?

I would get the warranty, just consider it as part of the price of buying the car and peace of mind....... Of course, I presume you are not stretching your finances to buy this warranty.
by Mrxyz
Mon Oct 23, 2017 1:04 pm
Forum: Personal Consumer Issues
Topic: Converting to Safety Razors
Replies: 116
Views: 12253

Re: Converting to Safety Razors

There was not a "natural" demand for cartridge razors. Gillette was looking for a more profitable options, a way to grow. They came up with the cartridge business model: affordable razor, expensive cartridge. They advertise it really hard (ads work) and the shifted the people towards the "new shine...
by Mrxyz
Sat Oct 07, 2017 5:09 pm
Forum: Personal Consumer Issues
Topic: Musty smell in a bedroom
Replies: 6
Views: 1258

Re: Musty smell in a bedroom

Vapor barrier may be a problem if installed incorrectly. Each situation is different based on how and where the barrier is installed.

Please read this wonderful website ;

https://buildingscience.com/documents/d ... r-barriers
by Mrxyz
Wed Oct 04, 2017 3:45 pm
Forum: Personal Finance (Not Investing)
Topic: another 2 comma club member
Replies: 48
Views: 4726

Re: another 2 comma club member

Congratulations!
by Mrxyz
Sun Sep 24, 2017 11:22 pm
Forum: Personal Consumer Issues
Topic: High school scholarships
Replies: 9
Views: 1041

Re: High school scholarships

https://www.amazon.com/Ultimate-Scholarship-Book-2018-Scholarships/dp/1617601225/ref=sr_1_1?ie=UTF8&qid=1506309058&sr=8-1&keywords=scholarship+book I used something similar to this back in the day when I was that age. Mailed out about a hundred applications and won 2 large scholarships that allowed...
by Mrxyz
Sun Sep 24, 2017 9:40 pm
Forum: Personal Consumer Issues
Topic: High school scholarships
Replies: 9
Views: 1041

High school scholarships

Hi all, I was told by colleagues that there are 'lots of high school scholarships' which a student can apply for especially if they have the drive, interest and focus to apply for them. Are there any recommended sites for them? Googling gets a lot of subscription sites. Any experience applying or ge...
by Mrxyz
Wed Sep 13, 2017 10:01 pm
Forum: Personal Finance (Not Investing)
Topic: Milestone Reached - "Quarter Millionaire!"
Replies: 41
Views: 5390

Re: Milestone Reached - "Quarter Millionaire!"

Congratulations !
And thanks for sharing your story!
by Mrxyz
Mon Sep 04, 2017 8:05 pm
Forum: Investing - Help with Personal Investments
Topic: Couple in early 30s, any changes?
Replies: 28
Views: 4158

Re: Couple in early 30s, any changes?

Congrats on a truly impressive income at such a young age (or at any age). I would suggest putting your bond holdings in your 401k and putting the equivalent stocks in taxable... especially in your tax bracket. Agreed. Try not to hold taxable bond funds in your taxable account. +1 Let me take a sta...
by Mrxyz
Thu Aug 31, 2017 10:56 pm
Forum: Personal Finance (Not Investing)
Topic: 2 comma club (my way)!!
Replies: 60
Views: 12847

Re: 2 comma club (my way)!!

Congrats. I am in a very similar situation you were in a couple of years ago. I am 46 and just got into the 2 comma club in investable assets earlier this year. Amazing that you made the next million in only 2 years. Can you share what you are saving per year and your asset allocation? My AA is aro...
by Mrxyz
Thu Aug 31, 2017 8:37 pm
Forum: Personal Finance (Not Investing)
Topic: 2 comma club (my way)!!
Replies: 60
Views: 12847

Re: 2 comma club (my way)!!

Folks, I will not be in this financial status without this forum!! I am on this board more often than any other site except my work outlook. I read as much as I can and try to understand it all. Some things I do not understand like Cruncher's numbers or "should bonds be in taxable".......I understan...
by Mrxyz
Thu Aug 31, 2017 7:46 pm
Forum: Personal Finance (Not Investing)
Topic: 2 comma club (my way)!!
Replies: 60
Views: 12847

Re: 2 comma club (my way)!!

Update:

Made it to 2M
His 475
Her 250
Taxable 1300

Does not include paid off home and cars, or kids 529 (3 kids but have only 110k)

Thanks to all!
by Mrxyz
Mon Aug 21, 2017 9:27 pm
Forum: Investing - Theory, News & General
Topic: The Final, Definitive Thread on Brokerage Transfer Bonuses
Replies: 847
Views: 144338

Re: The Final, Definitive Thread on Brokerage Transfer Bonuses

Just a FYI - I finally got my Merrill Edge accounts taken care of. Will get $1000 for each account of 250k kept for 12 months. August next year.
by Mrxyz
Sat Aug 19, 2017 8:28 am
Forum: Forum Issues and Administration
Topic: Home Page Updated
Replies: 82
Views: 7352

Re: Home Page Updated

I am not sure but I thought there was a way to go to the last page of a longer thread directly from the Home page. Meaning the page number were tiny clickable squares which are no longer present on the new home page. Was that intentional? Now, I have to click on the post and then find the page - usu...
by Mrxyz
Fri Aug 04, 2017 8:35 am
Forum: Personal Finance (Not Investing)
Topic: Anyone else have trouble spending?
Replies: 91
Views: 6944

Re: Anyone else have trouble spending?

Hi, I have similar problems!! I am stingy in many things despite high net worth and will not post most of the details. The question for you is probably to do with safety instead of saving money. 110 miles commute ! - what vehicle will you feel safer/safest in? If you feel you are okay with an older ...
by Mrxyz
Mon Jul 31, 2017 5:29 pm
Forum: Investing - Theory, News & General
Topic: The Final, Definitive Thread on Brokerage Transfer Bonuses
Replies: 847
Views: 144338

Re: The Final, Definitive Thread on Brokerage Transfer Bonuses

Working on transferring funds in kind to ME. It was quite painless and easy for me. Not sure about complains on some threads about this process... There's always a potential for a hiccup in these things. Generally, my moves from one large custodian to another have been pretty trouble-free. Sometime...