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September 26, 2022, 06:42:44 PM

Author Topic: Can I use the 6.3V to drive a USB board  (Read 77 times)

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Offline monteiro.sheldon

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Can I use the 6.3V to drive a USB board
« on: August 28, 2022, 06:01:37 AM »
Hello,

Can I use the 6.3V DC output in the Mainline to drive a Raspberry Pi Pico (3.3v and use a regulator) or will I risk damaging the transformer or recitifier circuit?

Thanks,
Sheldon
« Last Edit: August 28, 2022, 06:07:38 AM by monteiro.sheldon »

Offline Paul Birkeland

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Re: Can I use the 6.3V to drive a USB board
« Reply #1 on: August 28, 2022, 06:09:53 AM »
The Mainline 6.3V rails are biased up from ground/earth by about 50V, so that could very easily damage your RP or if you had a USB cable plugged into the RP and you touched the metal shell on the other end, you'll get a zap. 

There's also not a ton of extra current available in the heater circuit, so without knowing the current draw it's tough to say if the Mainline would be damaged.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline monteiro.sheldon

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Re: Can I use the 6.3V to drive a USB board
« Reply #2 on: August 28, 2022, 06:25:26 AM »
Thanks Paul for the quick response.