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Search: Posts Made By: andy_p
Showing results 1 to 50 of 148
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Forum: Touring
05-15-21, 03:58 AM
Replies: 4
Views: 781
Posted By andy_p

Ortlieb Ultimate 6 Classic handlebar bag and map

I'm looking at my options for map-based navigation on my bike, and have spent some time fiddling with the Ortlieb Ultimate 6 handlebar bag and map carrier that I bought a while ago.

It seems that...
02-15-21, 02:40 PM
Replies: 29
Views: 1,513
Posted By andy_p

I don't think so - they don't have any coils, or...

I don't think so - they don't have any coils, or involve electricity in any way.
02-15-21, 02:33 PM
Replies: 29
Views: 1,513
Posted By andy_p

I certainly found lots of poorly-engineered "we...

I certainly found lots of poorly-engineered "we slung a belt around a bicycle back wheel and it kinda started charging a battery" type solutions, but that seems like a waste of effort all around.
02-15-21, 02:23 PM
Replies: 29
Views: 1,513
Posted By andy_p

Interesting. Not much power output for the $350...

Interesting. Not much power output for the $350 price, which tells me something about how much of a difficult problem this is.



I did find that very interesting - thanks very much! I completely...
02-14-21, 04:16 PM
Replies: 29
Views: 1,513
Posted By andy_p

Thanks for the replies. Yes, I'm aware that even...

Thanks for the replies. Yes, I'm aware that even a fit amateur cyclist doesn't produce much power in the grand scheme of things :-) Hence why I'm not investing much money or resources into this...
02-14-21, 02:43 PM
Replies: 29
Views: 1,513
Posted By andy_p

Just for fun - human-powered, bicycle-based generator

On my list of speculative DIY projects is "human-powered bicycle generator". Ideally, it would be made from repurposed parts, especially bike parts (as I have a lot of those). I've finally got around...
12-29-20, 01:02 PM
Replies: 3
Views: 606
Posted By andy_p

Thanks for the reply - I did end up getting the...

Thanks for the reply - I did end up getting the rest of the bike brought to my little workshop. The original 27.0mm post was as loose as I remembered, but a 27.2mm post would not go in. I ended up...
12-27-20, 11:11 AM
Replies: 3
Views: 606
Posted By andy_p

Seatpost sizing - Marin Northside Trail 2004

My brother has a 2004 Marin Northside Trail, that he got 2nd hand and has definitely been assembled from a mix of parts. He needs a new seatpost clamp, and I noticed there was a small but definitely...
11-21-19, 10:24 AM
Replies: 50
Views: 3,661
Posted By andy_p

Thanks for the insight - I was making the...

Thanks for the insight - I was making the assumption that people would generally keep up a steady cadence.
11-21-19, 08:18 AM
Replies: 50
Views: 3,661
Posted By andy_p

I'm just thinking about this as a design...

I'm just thinking about this as a design exercise. Given that current solutions for charging larger devices (a phone, battery pack, etc) are expensive and less than ideal due to the issues already...
11-20-19, 09:49 AM
Replies: 50
Views: 3,661
Posted By andy_p

Indeed - this is the best thing to do with a...

Indeed - this is the best thing to do with a dynohub. I'm just wondering about what would be best for battery / device charging, given a blank slate.



5W is the USB charging standard, so most...
11-20-19, 03:11 AM
Replies: 50
Views: 3,661
Posted By andy_p

I'm thinking about charging a battery or USB...

I'm thinking about charging a battery or USB device, not lighting. In this case, the wide range of wheel rpm means you won't get full charging capacity (eg, USB requires 5W) until you are moving...
11-19-19, 10:20 AM
Replies: 50
Views: 3,661
Posted By andy_p

If you're doing a long, multi-day ride, you're...

If you're doing a long, multi-day ride, you're probably spending less time coasting than at low wheel rpm (where a dynohub can't generate much power). You could also just keep pedalling!

As for...
11-19-19, 09:33 AM
Replies: 50
Views: 3,661
Posted By andy_p

Chainring-driven generator?

A lot of the problems with generating consistent power (typically for charging batteries) from a dynohub stem from the fact that it operates over a wide range of rpm. If a generator was mounted to...
11-18-19, 03:16 AM
Replies: 21
Views: 1,503
Posted By andy_p

Sadly not any more - the best Garmin could offer...

Sadly not any more - the best Garmin could offer was 30% off a new device if I sent them my old one.
11-08-19, 04:18 PM
Replies: 21
Views: 1,503
Posted By andy_p

Maybe, but without Garmin's quality control, I...

Maybe, but without Garmin's quality control, I don't trust unbranded stuff from China. Quite a few of the reviews of similar replacements state it has poor initial capacity (50% - 75% of what is...
11-08-19, 03:57 PM
Replies: 21
Views: 1,503
Posted By andy_p

Honestly, it's not that surprising. Garmin don't...

Honestly, it's not that surprising. Garmin don't make replacement batteries (or at least, don't make them available to the public). It's a custom size, and I imagine demand is quite low. I would...
11-08-19, 03:49 PM
Replies: 21
Views: 1,503
Posted By andy_p

Thanks for dropping by! All of...

Thanks for dropping by!




All of them. The $28 one in the link gets 3 stars (admittedly, I think some of the reviewers have overly optimistic expectations, but still). That same page has a...
11-08-19, 03:12 PM
Replies: 21
Views: 1,503
Posted By andy_p

If I could find a decent quality replacement...

If I could find a decent quality replacement battery, I'd definitely replace the USB socket and get it working as well as it ever did. I have only found low-quality imports though, with very mixed...
11-08-19, 01:49 PM
Replies: 21
Views: 1,503
Posted By andy_p

Not necessarily - I could replace the USB...

Not necessarily - I could replace the USB connector (or just clean off the corrosion as best I can) and put it all back together. However, the battery holds around 1/3 the charge it used to, and the...
11-08-19, 09:17 AM
Replies: 21
Views: 1,503
Posted By andy_p

In case anyone is interested - I solved my...

In case anyone is interested - I solved my problem. As the Garmin was already very broken, I decided to unglue the USB board. It came out quite easily in the end, as it was sealed in with a flexible...
10-26-19, 12:16 PM
Replies: 21
Views: 1,503
Posted By andy_p

I have tried multiple cables and PCs with no joy....

I have tried multiple cables and PCs with no joy. The solder connections for the USB socket are on the other side of a PCB that is epoxied in place, so I wanted to see if I have any other options...
10-26-19, 03:02 AM
Replies: 21
Views: 1,503
Posted By andy_p

Recover ride from internal storage of Garmin 800

The USB connection on my Garmin 800 has died - for a while, I would get an on-screen message that "This device is not supported" when I turned it on (with nothing plugged into the USB), and recently...
02-22-19, 07:31 AM
Replies: 22
Views: 1,999
Posted By andy_p

The main downside IMO is the potential...

The main downside IMO is the potential incompatibility of the polyurea base with other greases (which are mostly not urea based). I learned this lesson the hard way after trying out Park Tools...
02-22-19, 07:25 AM
Replies: 2
Views: 2,060
Posted By andy_p

How did you find the measurements - from a...

How did you find the measurements - from a datasheet? Do they include the shock mounts as well as the pivot points? I would be surprised if you could actually find this info, so you won't really know...
02-06-19, 03:34 PM
Replies: 11
Views: 3,328
Posted By andy_p

So are they compatible with newer, boost 20mm...

So are they compatible with newer, boost 20mm axles?
02-06-19, 03:28 PM
Replies: 45
Views: 4,588
Posted By andy_p

Where I live, I have to, or I wouldn't be a...

Where I live, I have to, or I wouldn't be a cyclist ;)




So if it's really only any good in the dry, then does it matter what you lube the chain with?


I still have a large and almost full...
02-05-19, 01:44 AM
Replies: 45
Views: 4,588
Posted By andy_p

How well does hot chain waxing work on wet rides?

How well does hot chain waxing work on wet rides?
02-01-19, 07:06 AM
Replies: 11
Views: 3,328
Posted By andy_p

110x20mm is a relatively new, boost axle size. I...

110x20mm is a relatively new, boost axle size. I don't think it's the same as the axles on the older Marz forms. From what I've seen, old Marz axles are expensive.
01-22-19, 06:25 AM
Replies: 4
Views: 937
Posted By andy_p

Mystery tool

I found this set of things in a sealed bag in my toolbox, and am not sure what they are. There's two little wrenches (maybe nipple wrenches/aero spoke holder??), and a little plastic thing with a...
12-19-18, 08:48 AM
Replies: 18
Views: 2,046
Posted By andy_p

Thanks for the info on shunt regulators - so I...

Thanks for the info on shunt regulators - so I should be ok if I tap off the switched headlight output for a USB charger.


I planned for a design maximum speed of 60mph, which needed a buck...
12-18-18, 02:51 PM
Replies: 18
Views: 2,046
Posted By andy_p

Yep, but there's not much to it in this version,...

Yep, but there's not much to it in this version, as I'm relying on the regulated output of my headlight....
12-15-18, 05:29 PM
Replies: 18
Views: 2,046
Posted By andy_p

Interesting - confirms what I thought was inside...

Interesting - confirms what I thought was inside the headlight based on my measurements. As for the power rating - surely the current drawn by whatever external device I connect does not actually...
12-15-18, 11:09 AM
Replies: 18
Views: 2,046
Posted By andy_p

That's why I do this - there's an element of...

That's why I do this - there's an element of practicality, as I can (sometimes!) make things that are not otherwise available to me, but I also just enjoy the challenge and making something for...
12-14-18, 02:34 AM
Replies: 18
Views: 2,046
Posted By andy_p

Nice - so you just went for a ride and noted the...

Nice - so you just went for a ride and noted the speed/voltage? I did spend some time trying to make a powered test rig with a spare dynohub - would have been very convenient for making measurements....
12-11-18, 02:23 PM
Replies: 18
Views: 2,046
Posted By andy_p

Also, I made a test rig that could simulate...

Also, I made a test rig that could simulate speeds up to 70mph (and more!). I saw 100v RMS at 60mph.
12-11-18, 02:21 PM
Replies: 18
Views: 2,046
Posted By andy_p

Sounds like you were on the right track! If you...

Sounds like you were on the right track! If you measured with a multimeter, it would give you the RMS voltage, so 6v is about right.

I need to revisit my analogue circuit theory, as I'm not sure...
12-11-18, 01:00 PM
Replies: 18
Views: 2,046
Posted By andy_p

It's one of the Lumotec Cyo lights. Yes, the...

It's one of the Lumotec Cyo lights.

Yes, the output of the dynohub can reach very high voltages, which my original design could handle. When I hooked it up with the headlight connected, it barely...
12-11-18, 05:38 AM
Replies: 8
Views: 810
Posted By andy_p

I have thought about a project like this in the...

I have thought about a project like this in the past. Before I answer your questions, I'll give you the main issues I saw.

1. How will these indicators be turned on/off? As self-cancelling would...
12-11-18, 05:12 AM
Replies: 18
Views: 2,046
Posted By andy_p

DIY Dyno-hub powered bar end lights

Hi all,

I know there's some love for dynohub systems here, so here's the results of my latest project. I already have a Busch and Mueller lighting system, and thought it would look great (and be...
10-26-18, 12:25 PM
Replies: 10
Views: 1,076
Posted By andy_p

Thanks for the info! I have to take up at least...

Thanks for the info! I have to take up at least 1mm, so wasn't too sure about using washers. Yep, the original nipples have an extra long head with a hex end (and a nyloc insert), and the spokes...
10-26-18, 12:04 PM
Replies: 10
Views: 1,076
Posted By andy_p

What kind of washers will work? (This is a...

What kind of washers will work? (This is a socketed rim) I guess they'd have to be pretty small. Do they just deform to match the shape of the seat?
10-26-18, 09:03 AM
Replies: 10
Views: 1,076
Posted By andy_p

EDIT: I had another think about this, and I was...

EDIT: I had another think about this, and I was wrong about my measurements. However, I still need to replace the alu nipples, and I'm kinda stuffed because I only have 4mm of thread on the spoke. I...
10-26-18, 06:06 AM
Replies: 10
Views: 1,076
Posted By andy_p

Nipple failure

Once again I find myself stuck in the middle of another bicycle maintenance saga....

EDIT: I got myself a bit confused measuring things. This is now just a post about aluminium nipples being a bad...
10-26-18, 06:04 AM
Replies: 0
Views: 328
Posted By andy_p

Wheel

*duplicate*
10-23-18, 02:49 AM
Replies: 1
Views: 743
Posted By andy_p

Old Marzocchi fork - damper cartridge compatiblity

Hi all,

I have a 2002 Marzocchi Z1 FR fork with a busted damper cartridge. Parts for these old forks don't come up very often, but I know that Marzocchi often re-used parts across models. Does...
08-01-17, 12:48 PM
Replies: 236
Views: 19,557
Posted By andy_p

Show off my bikes and home country you say? With...

Show off my bikes and home country you say? With pleasure!

https://photos.app.goo.gl/9mMV7UwxZiTcjFeH3
08-01-17, 02:35 AM
Replies: 236
Views: 19,557
Posted By andy_p

Probably about worth it! Great ride with great...

Probably about worth it! Great ride with great company, and a decent collection of bikes too! Sad to be missing out, although the riding here in Wales isn't too shabby either. :thumb:
05-17-17, 08:22 AM
Replies: 58
Views: 6,909
Posted By andy_p

I didn't conclude that a torque wrench is no use,...

I didn't conclude that a torque wrench is no use, but that it is not as simple as I first thought. It certainly seems to me that the effects of nut/bolt condition (especially at the lower torques,...
05-17-17, 05:22 AM
Replies: 58
Views: 6,909
Posted By andy_p

Strangely enough, I have just spent the past day...

Strangely enough, I have just spent the past day or two researching torque wrenches for bike work. I eventually decided I needed at least 2, ideally three.

Firstly, a low-range wrench, around...
Showing results 1 to 50 of 148
 


 
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