Voltage increase.

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some bloke
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Voltage increase.

Post by some bloke » 27 Feb 2018, 23:23

What electrickery do I need to power this 9~30v wifi transmitter from 2x18650 cells please chaps? I'd be hardwiring it using a three core ribbon cable providing power, neutral and signal:
https://www.ebay.co.uk/itm/Waterproof-D ... 2293162776


It works from two cells but the image has lines rolling through it - which swapping to a 12v supply sorted, however there is insufficient space in my pods for an extra 18650 cell.

I'm guessing an increase to 9 volts would be more efficient than much higher?
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phoenix
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Re: Voltage increase.

Post by phoenix » 28 Feb 2018, 00:30

Dave,
You need a boost convertor -thousands on E Bay, but something like this would do it https://www.ebay.co.uk/itm/MT3608-2A-DC ... SwZQRYZnWg
Connect your power from the 2 x18650 to IN+ and IN- and take the output from OUT+ and OUT-
Adjust the output voltage using the little blue potentiometer. I'd set the output voltage to 12volts, you always need the output to be a couple of volts higher than the input for it to work correctly and it's just as efficient putting out 12 volts as it is at 9 volts
Hopefully that module will be small enough to fit in your housing.

Cheers

Bruce
LAND ROVER - THE WORLD'S WORST 4X4 BY FAR

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some bloke
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Re: Voltage increase.

Post by some bloke » 28 Feb 2018, 06:44

Bless ya little cotton socks Bruce, not only for the link but the excellent way you advised how to connect and set it for this old bloke to not mess it up. :thumbup:

It will indeed fit inside the 'lid' that replaces the 5" plug in monitor for a cordless manually adjusted windscreen spotter, transmitting a wireless signal to the users mobile or tablet. :angel:
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phoenix
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Re: Voltage increase.

Post by phoenix » 28 Feb 2018, 09:00

Dave,
If you go for the boost converter in my link, then read the notes on the sellers page about the direction to turn the pot to change the output voltage.

Cheers

Bruce
LAND ROVER - THE WORLD'S WORST 4X4 BY FAR

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some bloke
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Re: Voltage increase.

Post by some bloke » 28 Feb 2018, 14:21

Thank you very much Bruce. :angel:
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