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Search: Posts Made By: lsarccc
Forum: Stafford Mini Z Racers England 2008.02.25, 06:19 AM
Replies: 1
Views: 851
Posted By lsarccc
Smile Photo tips

Hey Tom, have you seen this second part to the photography tips on oOple?

http://www.oople.com/rc/photos/article-photo2/index.html


I posted the first article on the other forum, incase you...
Forum: TGR 2008.01.22, 07:41 AM
Replies: 52
Views: 2,682
Posted By lsarccc
Smile Very nice! You Sir, will see the colour of my...

Very nice! You Sir, will see the colour of my money :)
Forum: TGR 2008.01.22, 07:17 AM
Replies: 18
Views: 1,358
Posted By lsarccc
Smile Fantastic - I'll be having some of these :) ...

Fantastic - I'll be having some of these :)

Will you have window masks? and lighting decals?
Forum: Batteries, Chargers and Dischargers 2008.01.18, 08:12 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Cheers guys, work is progressing - I hope to make...

Cheers guys, work is progressing - I hope to make some major advances this weekend and be able to have a trace of the load going around the track next week.

I was just looking again at fixed...
Forum: Stafford Mini Z Racers England 2008.01.16, 05:16 PM
Replies: 13
Views: 1,279
Posted By lsarccc
Smile Very nicely done! I enjoyed the video and for...

Very nicely done! I enjoyed the video and for once I didn't have to switch the sound off - great!
Forum: Aftermarket Chassis 2008.01.16, 03:58 PM
Replies: 453
Views: 48,401
Posted By lsarccc
Smile Dead pole on the motor? Check continuity of the...

Dead pole on the motor? Check continuity of the winds?
Forum: Batteries, Chargers and Dischargers 2008.01.16, 01:46 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile A distraction...

I was thinking about how to calibrate the current sensor and decided that I'd use this as an opportunity to test the discharge side of the discharger by using that to supply different currents to...
Forum: Aftermarket Chassis 2008.01.15, 06:52 AM
Replies: 453
Views: 48,401
Posted By lsarccc
Smile Very nice! (Is the top brush spring on the...

Very nice!

(Is the top brush spring on the motor sat properly? Bottom pic looks like it's sat on the hood rather than the brush?)
Forum: Batteries, Chargers and Dischargers 2008.01.14, 12:19 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile That is a beautiful piece of kit :cool: I think...

That is a beautiful piece of kit :cool: I think you will definitely win over the gadget freaks and pit poseurs! The variable rate and cutoff with get the racers too - nice presentation! Now a USB...
Forum: Batteries, Chargers and Dischargers 2008.01.14, 06:49 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Well that's still a nice product - I look forward...

Well that's still a nice product - I look forward to hearing more about it. TGR seems very active at the moment, I'm racing in the Hurda challenge in Stafford later this month - I suspect I'll...
Forum: Batteries, Chargers and Dischargers 2008.01.14, 01:17 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile You're announcing a discharging device! That's...

You're announcing a discharging device! That's fantastic and very interesting news. I hope you do well with it and it allows many people in the hobby to share data that has been measured with...
Forum: Batteries, Chargers and Dischargers 2008.01.13, 09:48 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Thanks Matt, the bugs have developed over a few...

Thanks Matt, the bugs have developed over a few years. These three gives an idea of the things I've tried. The central one hints at how small we could go with better pcb designing and making...
Forum: Batteries, Chargers and Dischargers 2008.01.12, 05:14 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Thanks Jonny - it'll be me trying to keep up...

Thanks Jonny - it'll be me trying to keep up where it matters (on the track) at the Hurda challenge! :rolleyes:

I'm racing 1/10th early tomorrow morning so I'd better at least look at my car,...
Forum: Batteries, Chargers and Dischargers 2008.01.12, 03:30 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Preliminary tests show the bug works great!

Well I ended up with more time on my hands than I expected :)

I finished the bug, including tying the MCLR pin to Vdd with a 100K surface mount resistor. Added an aerial (I carefully calculated a...
Forum: Batteries, Chargers and Dischargers 2008.01.12, 09:18 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Esr

Matt - I'm trying to learn more on the ESR meter. Very interesting, I still don't really get it. Be good to see some more info about use on batteries looks like a better/proper way to measure IR. ...
Forum: Batteries, Chargers and Dischargers 2008.01.11, 07:50 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Building the telemetry bug

So I'll use the 12F675 in DIP format for this. All we're trying to do is get a trace of current draw going round a track so this will be a little 'ghetto'.

Incidentally Microchip do the...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 03:55 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile You seem to be very precise in the way you go...

You seem to be very precise in the way you go about these things - I'm sometimes tempted to be slack and cut the odd corner to get there quicker... But a good team in the forming methinks.

I...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 02:07 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile I thought this was simple Kirchoffs - if you know...

I thought this was simple Kirchoffs - if you know the load resistance, the current and the voltage you can calculate the missing resistance which is in the cell?

If the current was stable I...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 01:41 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile @Wolf... overloaded! - I need to sit with a...

@Wolf...

overloaded! - I need to sit with a soldering iron and smell some lead fumes.

Thanks for the comments - considered replies will follow might take the weekend to fully take it in :)
Forum: Batteries, Chargers and Dischargers 2008.01.10, 01:38 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Hmmm - I haven't finished thinking that through...

Hmmm - I haven't finished thinking that through properly...

The minimum is that you let the cell rest, measure a voltage - hit it with a big discharge current. Take the dischage away and...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 12:53 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Wolf - you raise so many good points in your...

Wolf - you raise so many good points in your posts I have to focus a little bit (I am too easily distracted!) but perhaps we can revisit some things another time/project :)



Yes - things...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 07:31 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Hey thanks for the sticky Kris, the pressure's on...

Hey thanks for the sticky Kris, the pressure's on for an interesting result!

My 1/10th touring car speedo can be programmed with varying frequencies across the throttle range from 500Hz to 6.5Khz ...
Forum: Batteries, Chargers and Dischargers 2008.01.10, 12:56 AM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile :) It's nice to have friends - especially ones...

:) It's nice to have friends - especially ones that have data!, very interested in the duracell stuff Matt :D Yes, I need to PayPal Jonny - will get that sorted this week. (I will need to tap...
Forum: Batteries, Chargers and Dischargers 2008.01.09, 04:06 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Intermittent & varied vs constant discharge

OK, my core assumption for doing this is that using fixed discharge rates may be flawed when measuring the performance of cells as used in toy car racing. We know that the way we put the charge in...
Forum: Batteries, Chargers and Dischargers 2008.01.09, 01:03 PM
Replies: 53
Views: 11,618
Posted By lsarccc
Smile Drive frequency

OK - not much help so far with my questions, so I decided to help myself :)

Clearly the drive frequency of the esc does matter, the lower the freq. the less efficiently the esc operates and more...
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