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I need to 8 channels of 100Vdc to 300vdc, load current 10mA to 80mA.

my idea is to use a step transformer to step up dc 5v 1A source to 300Vdc 50mA (typical application).

low voltage side of the transformer (5v side) will be controller with MOSFET using a microcontroller and the output side or high voltage side will connect to load.

I need 8 channel outputs with a single transformer setup.

how to demux 300Vdc channel into 8 channels? I am using a single channel at a moment

output will be used to sense muscles nerves

also, I want to know is it possible to use a boost converter to sense muscle like LT8331 9V to 16V Input, 135V Boost Converter

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    \$\begingroup\$ First re-do you power calculations. All figures given thus far show that you want to get more energy out then you put in. \$\endgroup\$ – Oldfart Oct 17 '19 at 16:17
  • \$\begingroup\$ Why do you need 8 channels? Is this for sensing or power? \$\endgroup\$ – Voltage Spike Oct 17 '19 at 16:21
  • \$\begingroup\$ @Voltage Spike this is for sensing \$\endgroup\$ – oppo Oct 17 '19 at 16:58
  • \$\begingroup\$ Please capitalise and punctuate properly. Not doing so creates a very bad impression. See Write to the best of your ability on the site's help pages. \$\endgroup\$ – Transistor Oct 17 '19 at 19:21
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You lead with "my idea is to use a step transformer to step up dc 5v 1A source to 300Vdc 50mA (typical application)"

5V 1A = 5 Watts. 300V 50 mA = 15,000 mW = 15 Watts.

This won't work, son. The First Law of Thermodynamics, Graduate Student Version, tells us "You can't get something for nothing."

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First of all transformers are for AC only. Not DC. If you want to step up DC you need a BOOST converter. You don't use boost converters for sensing, you use transducers for converting any analog (aka real world) inputs into DC values your circuit and evaluate.

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  • \$\begingroup\$ i did not get it "you use transducers for converting any analog (aka real world) inputs into DC values your circuit and evaluate." could you explain ? \$\endgroup\$ – oppo Oct 19 '19 at 12:40

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