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Search: Posts Made By: Jshwaa
Forum: GLA 1:27 4WD 2017.02.02, 07:51 PM
Replies: 9
Views: 1,132
Posted By Jshwaa
Don't know a better option than li-po in terms of...

Don't know a better option than li-po in terms of energy density. The power to mass ratio is unbeatable. Go for 7.4V and as high mAh you can find. Solder on your own desired connector. If you're...
Forum: Beginner Questions 2017.01.27, 05:40 PM
Replies: 13
Views: 817
Posted By Jshwaa
Stacking probably won't do much for you with...

Stacking probably won't do much for you with brushless. You may be able to get away with a heavier kv rated motor, but that won't change the switching speed of the inverter (controller). Stacking...
Forum: Beginner Questions 2016.02.28, 06:20 PM
Replies: 9
Views: 1,332
Posted By Jshwaa
Of course all the above tips are good, but...

Of course all the above tips are good, but nothing beats verifying. You can use a meter and measure the voltage. For a new race, use the cells with the highest voltage.
Forum: Mini-Z Science 2016.02.20, 11:50 AM
Replies: 5
Views: 1,254
Posted By Jshwaa
I had that happen a few times as well. Simply...

I had that happen a few times as well. Simply handling the board and wiring tends to weaken and break those wires quickly.

I used to use a razor and with a delicate touch, cut away the insulation...
Forum: Motor Tech 2016.02.02, 06:44 PM
Replies: 8
Views: 1,441
Posted By Jshwaa
I suggest you spend the $3 and surprise yourself....

I suggest you spend the $3 and surprise yourself. Look up "FFT Plot - Real Time Sound Frequency Analyzer". This app works on the same principle, and people use variants to tune instruments.
Forum: Motor Tech 2016.01.31, 07:24 PM
Replies: 8
Views: 1,441
Posted By Jshwaa
Aw, you're no fun, Mike...

Aw, you're no fun, Mike...
Forum: Motor Tech 2016.01.31, 11:04 AM
Replies: 8
Views: 1,441
Posted By Jshwaa
True, photo tachometers work well because you get...

True, photo tachometers work well because you get a definite peak and valley per rotation, however using sound should work just as good as long as there is no other audible noise being picked up by...
Forum: Motor Tech 2016.01.15, 08:37 PM
Replies: 8
Views: 1,441
Posted By Jshwaa
Processes audio frequency to determine speed. ...

Processes audio frequency to determine speed. Neat.

Accurate? Don't see why not.
Forum: General Discussion 2015.12.25, 12:02 PM
Replies: 8
Views: 1,391
Posted By Jshwaa
The 'brake power' is a function of the motor's...

The 'brake power' is a function of the motor's magnets and armature turns to a large extent, however it is interesting that you are noticing a difference from one board to the next.

When an RC...
Forum: Mini-Z Racer MR-03, MR-03 VE, Sports Series, EVO 2015.12.23, 07:30 AM
Replies: 22
Views: 1,870
Posted By Jshwaa
For those that would be inclined... To...

For those that would be inclined...

To mitigate the ill effects of increasing the voltage on steering, you could add between 1 and 2 ohms of resistance in series with either of the wires leading...
Forum: Motor Tech 2015.12.21, 07:07 PM
Replies: 11
Views: 2,185
Posted By Jshwaa
Yes, well....from the looks of that, it is a...

Yes, well....from the looks of that, it is a brushless motor tester to the extent of checking functionality, with the ability of measuring no load speed and power consumption. That does not load the...
Forum: Motor Tech 2015.12.20, 01:45 PM
Replies: 11
Views: 2,185
Posted By Jshwaa
Thanks!

Thanks, guys! Much appreciated. :)

I wish I had more time to spend with mini-z, especially on the actual racing side of it. You guys definitely have good experts here in that regard.

I was...
Forum: Motor Tech 2015.12.19, 09:08 PM
Replies: 11
Views: 2,185
Posted By Jshwaa
Dynamometer Project Progress

I developed the dynamometer enough to be able to present it as my senior design project to meet the requirements for graduating with a Bachelors of Science in Electrical Engineering. Below is a...
Forum: Aftermarket Chassis 2015.06.03, 08:40 AM
Replies: 128
Views: 11,295
Posted By Jshwaa
sigh... You insinuate that I am...

sigh...



You insinuate that I am suggesting your test specifications, and I am not. I am simply saying the testing should be impartial.



Because wouldn't it be more effective to have a...
Forum: Batteries, Chargers and Dischargers 2015.06.03, 07:06 AM
Replies: 5
Views: 1,001
Posted By Jshwaa
Wow, just saw the thing on the front page of...

Wow, just saw the thing on the front page of Yahoo! today...

What people will appreciate about this 'batteriser' is that for devices which are critical about the 'voltage level' of the cells as it...
Forum: Batteries, Chargers and Dischargers 2015.06.02, 09:03 PM
Replies: 5
Views: 1,001
Posted By Jshwaa
It's snake oil.

The device boosts voltage, but not overall power output of the cell. Also, the charge boost circuit would add resistance to your motor current. Not ideal for 'cars', despite what the commercial...
Forum: Aftermarket Chassis 2015.06.02, 10:57 AM
Replies: 128
Views: 11,295
Posted By Jshwaa
It sounds like you have a lot thought out,...

It sounds like you have a lot thought out, including your business model, but about the testing...

This is your advertisement. You are answering the question, why your design and NOT the MRX. ...
Forum: Aftermarket Chassis 2015.06.02, 07:09 AM
Replies: 128
Views: 11,295
Posted By Jshwaa
Firstly, nice job on your mod. You showed some...

Firstly, nice job on your mod. You showed some nice progression and followed through to completion.

Secondly, if an alternative to the MRX is what's in mind here, let's see full-on...
Forum: Aftermarket Chassis 2015.05.31, 06:09 PM
Replies: 128
Views: 11,295
Posted By Jshwaa
pdf tools

I use primo pdf, totally free, and it basically adds itself to windows as a printer. You can make anything in any software you want, and save it as a .pdf file when you are done.
Forum: Motor Tech 2015.05.26, 12:11 PM
Replies: 11
Views: 2,185
Posted By Jshwaa
Thanks for that feedback. I'm finding that at...

Thanks for that feedback. I'm finding that at higher test voltages, the motor initially pulls so much current that the actual voltage dropped on the motor dips down. From a test standpoint, that...
Forum: Motor Tech 2015.05.25, 09:33 PM
Replies: 11
Views: 2,185
Posted By Jshwaa
Ideal Dynamometer Test Voltage

The mini-z motor dyno design is coming along....


http://i83.photobucket.com/albums/j314/Jshwaa/Mini-Z/DSCN2686.jpg (http://s83.photobucket.com/user/Jshwaa/media/Mini-Z/DSCN2686.jpg.html)
...
Forum: Mini-Z Racer MR-03, MR-03 VE, Sports Series, EVO 2015.05.23, 10:17 AM
Replies: 14
Views: 983
Posted By Jshwaa
I see. Guess that puts the emphasis on cells... ...

I see. Guess that puts the emphasis on cells...

Are you allowed to do anything to the motor before the race(ie. wear-in, commutator drops, lubrication, etc.)?
Forum: Mini-Z Racer MR-03, MR-03 VE, Sports Series, EVO 2015.05.22, 03:07 PM
Replies: 14
Views: 983
Posted By Jshwaa
How do they qualify a motor as being 'stock'? ...

How do they qualify a motor as being 'stock'? Are they all purchased 70t motors direct from Kyosho?
Forum: Motor Tech 2015.05.21, 09:29 AM
Replies: 24
Views: 2,166
Posted By Jshwaa
It's all good. It's better to be safe than...

It's all good. It's better to be safe than sorry, no doubt, however it is very liberating when you can safely pull off FET jobs as easy as a 'plug and play'. The rule is to never check your work by...
Forum: Motor Tech 2015.05.20, 08:17 AM
Replies: 24
Views: 2,166
Posted By Jshwaa
While I agree with the words of caution, I don't...

While I agree with the words of caution, I don't see how enhancing the power supply alone will solve the FET heating issue. Perhaps my suggestion should have been to purchase a higher power ESC for...
Showing results 1 to 25 of 215

 
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