Search found 407 matches

by edocaster
30 Dec 2018, 5:55pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

TW1 is a SMD code for the dual common cathode schottky BAT54C. It is essentially two diodes that share a common cathode. It would appear to be a pnp transistor if tested using a multimeter. The BAT54C simply acts as two half-wave rectifiers charging the 1.0F capacitor via the 10ohm resistor. It isn...
by edocaster
29 Dec 2018, 11:36pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

that is how 'crowbar' circuits work I think. Hub dynamos are current-limited anyway, so this means of limiting the voltage is actually quite a neat arrangement. Also, isn't shimano's voltage regulator gizmo similarly configured? cheers Embarrassingly, I forgot most of what I learned two years ago, ...
by edocaster
28 Dec 2018, 12:21am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

I finally had a chance to sketch a circuit diagram for the Pico 30. It might have a few errors and non-standard symbols, unfortunately: IMG_20181227_205608s.jpg The above was achieved by looking at the traces and a bit of prodding around with a multimeter. I was surprised the transistor was on the A...
by edocaster
7 Dec 2018, 7:12pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

Edit: the current Pico 15 is 15 lux. The Blueline 30 may have replaced the old Pico. €15 at bike-discount just now . Axa are annoying with their product range sometimes! Honestly, for them to release a 15 lux version they would have to purposefully gimp the 30 lux version. These lights have to run ...
by edocaster
7 Dec 2018, 12:29am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

Here are a few images from my old Axa Pico 30. As outlined previously, it started to cut-out at speed. I'm loathe to chuck it just yet - maybe the teardown will help someone. I was surprised that the whole thing came apart from unscrewing just one screw. There were no seals and no real waterproofing...
by edocaster
1 Dec 2018, 11:30am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

So I've had the Cyo Premium for a few days now, including riding through awful rain. My impression so far is positive, although I found the beam a little too optimised. The Axa Pico was a little more forgiving, whereas the Cyo needs 'perfect' aim, yet I'll seldom be riding in a flat, straight line. ...
by edocaster
17 Nov 2018, 10:30pm
Forum: Does anyone know … ?
Topic: WTO tariff codes and rates for bikes/frames?
Replies: 11
Views: 740

Re: WTO tariff codes and rates for bikes/frames?

What is more interesting is what will happen to imports from outside the EU: https://www.cyclist.co.uk/in-depth/2233/brexit-and-the-bicycle-what-could-a-no-deal-departure-from-the-eu-mean-for-cycling The provisional finding is that punitive trade measures on bicycles could be terminated: https://www...
by edocaster
17 Nov 2018, 10:14pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

Just a heads up, but Amazon may have good prices for: B&M 'Eyc T': https://www.amazon.co.uk/Busch-Müller-LED-Headlight/dp/B00FEIUC74?th=1 - £20 and B&M 'Cyo Premium Senso': https://www.amazon.co.uk/Busch-Müller-Lumotec-Premium-dynamo/dp/B00GO9WBGC/ref=cts_sp_4_vtp - £29 The descriptions are ...
by edocaster
2 Nov 2018, 7:50am
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

My Axa Pico 30 is finally playing up, after three years. It flickers and cuts out at speed now, resetting when stopped. Sounds almost exactly like a resettable overvoltage crowbar. Obviously it shouldn't be happening if the light is enough to saturate the 500mA from the dynamo. I'm not sure what has...
by edocaster
21 Jun 2018, 7:48am
Forum: Does anyone know … ?
Topic: Crisis in confidence in bike quality
Replies: 40
Views: 2917

Re: Crisis in confidence in bike quality

I don't know about the hybrids, but I've commuted on a Decathlon Triban 3 road bike for the last 7 years. Nothing needed unduly early changing.
by edocaster
5 May 2018, 10:58pm
Forum: Does anyone know … ?
Topic: This must be a first
Replies: 22
Views: 2801

Re: This must be a first

I went back to the shop and picked one up today. I.e. physically picked one up, not bought one. Turns out there are two cleats in the pack - the second one is behind the card - and a complete set of nuts and bolts. Now that really is a crazy price.
by edocaster
29 Apr 2018, 10:03pm
Forum: Does anyone know … ?
Topic: This must be a first
Replies: 22
Views: 2801

Re: This must be a first

Just to clarify, as the topic starter, I wouldn't recommend this purchase... The risk is if the plastic is a bit too pliant, a rider might find themselves unable to clip out. That's the worst case scenario. It's ridiculously cheap even compared to buying from Aliexpress or eBay. But I think it's jus...
by edocaster
28 Apr 2018, 8:28pm
Forum: Does anyone know … ?
Topic: This must be a first
Replies: 22
Views: 2801

This must be a first

SPD-SL compatible (I think) cleats in Poundworld. For, you guessed it, a pound.

I don't do road shoes, so can't try them. I wonder if anyone will take the risk?

IMG_20180428_153010s.jpg
by edocaster
16 Apr 2018, 11:14pm
Forum: Bikes & Bits – Technical section
Topic: Dynamo Lighting - fit and forget?
Replies: 132
Views: 7425

Re: Dynamo Lighting - fit and forget?

Having the overall switch in the front light control both lights is a requirement of German law.