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Looking for somone to build a small electronic circuit
uk-tyler
Posts: 108 Forumite
in Techie Stuff
Can anyone tell me who or where I can get a small electronic circuit built?
I have the schematic, but not the tools or patience to build it myself.
I need a small box that will take the 6v fluctuating current of a bicycle dynamo wheel and give out a steady 5v, preferably with a USB female and possibly a Nokia charger.
I'm going cycle touring next year, and want to take some gadgets with me.
I have the schematic, but not the tools or patience to build it myself.
I need a small box that will take the 6v fluctuating current of a bicycle dynamo wheel and give out a steady 5v, preferably with a USB female and possibly a Nokia charger.
I'm going cycle touring next year, and want to take some gadgets with me.
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Comments
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Can't help build it, but you could buy it completeUtinam logica falsa tuam philosophiam totam suffodiant.0
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From memory of dynamos they put a lot of drag on the wheel. Have you thought about a solar charger?Apparently I'm 10 years old on MSE. Happy birthday to me...etc0
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No need to build anything, an LM7805 will take up to 30V in and deliver a stabilized 5V out with currents in excess of 1A (heatsink needed if you want to exceed 1A on the output side).Can anyone tell me who or where I can get a small electronic circuit built?
I have the schematic, but not the tools or patience to build it myself.
I need a small box that will take the 6v fluctuating current of a bicycle dynamo wheel and give out a steady 5v, preferably with a USB female and possibly a Nokia charger.
They come in a TO-220 package, and are very simple to wire up (Pin 1 = Input, Pin 2 = Common, Pin 3 = Output).
It goes without saying that you will need at least 5V present at the input for a 5V stabilized output.Remember kids, it's the volts that jolt and the mills that kill.0 -
Hey, you could always bolt the LM7805 to the underneath of your saddle using that hole at the top....voila! instant saddle warmerKillerWatt wrote: »No need to build anything, an LM7805 will take up to 30V in and deliver a stabilized 5V out with currents in excess of 1A (heatsink needed if you want to exceed 1A on the output side).
Who is going to present this to the dragons?
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DatabaseError wrote: »Can't help build it, but you could buy it
I hadn't seen that, even though I looked, thank you.
However it only kicks out 300mA, and I think my GPS tracker pulls more than that. most USB devices can pull 500mA I think.0 -
500mA is the absolute maximum a USB port can supply, I have never seen a USB device pull that in real life.most USB devices can pull 500mA I think.
PS
Just checked what my phone pulls when charging, it's taking 4.09V @ 275mARemember kids, it's the volts that jolt and the mills that kill.0 -
KillerWatt wrote: »500mA is the absolute maximum a USB port can supply, I have never seen a USB device pull that in real life.
PS
Just checked what my phone pulls when charging, it's taking 4.09V @ 275mA
Not sure what mine takes, its a Nokia 3230, but it will be using the GPS function constantly, and that kills the battery. Ideally I's be using it to charge AAA batteries via a USB charger too.
I'm not well versed in electronics, but if you think that will be sufficient then I'll get one. I'm in Germany at the minute, so I can get one cheap.0 -
Can anyone tell me who or where I can get a small electronic circuit built?
I have the schematic, but not the tools or patience to build it myself.
I need a small box that will take the 6v fluctuating current of a bicycle dynamo wheel and give out a steady 5v, preferably with a USB female and possibly a Nokia charger.
I'm going cycle touring next year, and want to take some gadgets with me.KillerWatt wrote: »No need to build anything, an LM7805 will take up to 30V in and deliver a stabilized 5V out with currents in excess of 1A (heatsink needed if you want to exceed 1A on the output side).
They come in a TO-220 package, and are very simple to wire up (Pin 1 = Input, Pin 2 = Common, Pin 3 = Output).
It goes without saying that you will need at least 5V present at the input for a 5V stabilized output.
You obviously don't understand the difference between alternating current and direct current. The OP needs a stabilised DC voltage, so "it goes without saying that" your suggestion won't work.Hey, you could always bolt the LM7805 to the underneath of your saddle using that hole at the top....voila! instant saddle warmer
Who is going to present this to the dragons?
Let KillerWatt make a fool of himself, the Dragons like a good laugh now and again!
:rotfl::doh: Blue text on this forum usually signifies hyperlinks, so click on them!..:wall:0 -
Look up the definition of the word "Dynamo", then look up an LM7805 and see what that does.You obviously don't understand the difference between alternating current and direct current. The OP needs a stabilised DC voltage, so "it goes without saying that" your suggestion won't work.
Let KillerWatt make a fool of himself, the Dragons like a good laugh now and again!
:rotfl:
If of course the OP's "dynamo" turns out to not be a dynamo, then a simple IN4001 will provide the DC required.Remember kids, it's the volts that jolt and the mills that kill.0
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