That was charging a Sony Experia Z smartphone, which has a very large battery (2330ｍAh). With an iPhone, with its smaller 1440mAh, this might be more like 2% charge per 1km.In any case, with the phone powered off, it will charge fully over a full day of cycling. 10 years ago In this post I describe how I made a DIY bicycle dynamo USB charger for smartphones and battery packs.

The first one ended up in a PVC pipe casing, which is ugly and bulky.

But most of the time, they will be red (positive), black (negative) and white (data). It works exactly the same as this new slick-cased version. I will be really grateful.I don't know much but i live with electronic engg guys who know about it so if given a complete schematics they can do it. I want to charge a battery through a dynamo fitted to a cycle.

A bicycle dynamo hub, however, usually creates electricity in the form of alternating current (AC), at 6 volts.

Discussions. term of the battery. Here, the charger is attached using a cable tie, in the photo at the top of this post, we have attached a velcro strap, which will make attaching/removing the charger easier.yeah i would need a scheme of the circuit as well… thanks anyway !I would like to do it without that stripboard but the circuit connections seem a kind confuse to figure out to me… thanks anyway, this is just what im looking for, a stable powering out of a fluctuating dynamo source You said you used a 25V 2200 microfarad capacitor, but you linked (the Farnell link) a 16V 2200 microfarad.Thanks a lot for your guide anyways, Im bought the components and am working on this right now Got an external battery and a 6V 3W Shimano Dynamo so hopefully it will work.hi, i am also not an electronics engineer.

i settled on using my old drill as a generator but the power just goes I first attached the micro-USB cable. The idea came from multiple sources, including Mr. Howdy, Arenddeboer.com, and Peter. When charging your smartphone using a wall charger or your laptop’s USB, the electricity going into your phone is direct current (DC) at 5 volts.

I don't know electronics.

Using a couple of different size heat-shrink tubing, I covered the whole thing up, making it very weather-proof.I wanted to be able to easily attach and remove the charger from my bike. Using the PVC-pipe-case version, I was able to get around 1% charge for every 1km pedaled on a laden, flat-terrain four-day cycle tour (with the phone powered off).

The arrow should be point to the pos. I am not sure a dynamo would be able to produce 28/30V. The polarity (negative and positive direction) here doesn’t matter at all; the bridge rectifier has magic fairies inside that sort all that out.Install the circuit board in a suitable container.
I cannot understand a circuit diagram. Re-design.

10 years ago The wire running from my hub to the female connectors is on my bike all the time, and I can just connect the charger when I need to.This is the second charger I have made (using the exact same circuitry).

I did this by scoring the board with a craft knife on both sides and then snapping it.Start to populate your board. You need that one to stop current going directly to the regulator (LM2940). Can i order these online?

i settled on using my old drill as a generator but the power just goes into the drill instead of the batterys do i need a diode and what sort? Red on the positive line, black on the negative line.Next, attach the wires that will run from the dynamo hub. It does not put out enough charge to keep up with intensive computing tasks like Google Map Navigation.

I happened to have an old fish-tank PH level tester container hanging around that was a perfect size.Container sorted, time to thread the cables through the openings and solder them to the circuit board. Frustratingly, USB cable inner wire colors are sometimes different (like, green for negative).

Tags: generator diode electronics cool blue prints dynamo battery 12 5v high voltage batteries batterys fun k nex. So, we’ve got to change the electricity created by the dynamo hub (6V AC) into the same type as what comes out of your smartphone wall charger or your laptop’s USB (5V DC).

Answer This was easily done by using simple male/female connectors. I know i am a total … Before sealing the container up properly, now may be a good time to hook the unit up to a dynamo hub and smartphone to check that everything is working.This step is not essential, but I wanted to make this unit as weather-proof as possible. 0. That is, with the screen on all the time, plus the GPS running, the battery will still run down even while charging.My wife has claimed this new version as her own, so I am still stuck with the PVC pipe version.

by the way the drill is 12.5v.

We will attach this to the circuit-board, and it will plug into your smartphone. Answered. Click on the photos for a larger version.This step can be tricky…aligning the bridge rectifier in place.


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