Also available, these little smart phone stands with built in micro USB cable for £0.10! Reviews don't look great and stock seems limited but worth a punt I suppose.
bought 200. never know when you'll need one :smile:
jewelie
2 Oct 164#30
Nearly right. Heat.
PS As for the voltage drop, that's just ohms law - voltage = current * resistance. So, at 0.5A current just 1ohm of resistance on a cable = 0.5V voltage drop. At 4.5V your phone will limit it's current draw and certainly won't take more. In the above example, the heat would just be power = current * current * resistance = 0.25W, not much but enough. At 2A you'd have 2V voltage drop = only 3V to charge the device and you'd be dissipating 4W *just* from the cable ((in reality the phone/tablet would reduce it's current draw and would just charge at 0.5A due to the voltage drop.)
P666DOM to thomasleep
2 Oct 163#15
It's a maths trick, subtracts 10p from your wallet.
All comments (50)
dtokez
1 Oct 16#1
liamf12
1 Oct 162#2
Just bought some white ones, thanks. Cheap replacement for all those pricey ones my kids seem to have eaten.
smudge92
1 Oct 161#3
Thanks Man! some great little stocking fillers! just brought £3 worth.
kevykat
1 Oct 164#4
bought 200. never know when you'll need one :smile:
smudge92 to kevykat
1 Oct 161#6
really? you spent £20 on these? sounds like an awful idea unless you plan to sell them on at 50p each or something. they are too short wired to be massively helpful.
Sanjuk
1 Oct 162#5
Wow great find just ordered 300 but can only get delivery on the green coloured ones lol
DominicPTS to Sanjuk
2 Oct 161#14
Ordered 400 just to go one better although no idea what I'll use them for
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Opening post
Other colours available:
Black: http://www.maplin.co.uk/p/usb-bag-cable-with-micro-b-connector-black-a47ly
Green: http://www.maplin.co.uk/p/usb-bag-cable-with-micro-b-connector-green-a49ly
Purple: http://www.maplin.co.uk/p/usb-bag-cable-with-micro-b-connector-purple-a50ly
Pink: http://www.maplin.co.uk/p/usb-bag-cable-with-micro-b-connector-pink-a53ly
White: http://www.maplin.co.uk/p/usb-bag-cable-with-micro-b-connector-white-a48ly
Also available, these little smart phone stands with built in micro USB cable for £0.10! Reviews don't look great and stock seems limited but worth a punt I suppose.
Black: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-connector-black-a54ly
Green: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-connector-green-a56ly
Blue: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-connector-blue-a58ly
Purple: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-connector-purple-a57ly
Pink: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-connector-pink-a60ly
White: http://www.maplin.co.uk/p/usb-smartphone-stand-with-micro-usb-white-a55ly
Top comments
Nearly right. Heat.
PS As for the voltage drop, that's just ohms law - voltage = current * resistance. So, at 0.5A current just 1ohm of resistance on a cable = 0.5V voltage drop. At 4.5V your phone will limit it's current draw and certainly won't take more. In the above example, the heat would just be power = current * current * resistance = 0.25W, not much but enough. At 2A you'd have 2V voltage drop = only 3V to charge the device and you'd be dissipating 4W *just* from the cable ((in reality the phone/tablet would reduce it's current draw and would just charge at 0.5A due to the voltage drop.)
All comments (50)