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3 votes

Beginner question regarding voltage divider for microcontroller

You can't just design voltage dividers/signal conditioners without understanding the charactoristics of the source signal first - that's called putting the cart in front of the horse. Here's what you ...
MOSFET's user avatar
  • 4,707
2 votes

More current draw from a power supply based on a voltage divider

The VGND needs the ability to sink as much current as the sources produce (if the load currents are not being drawn symmetrically or near symeterically) For analog electronics most of the supplies ...
Voltage Spike's user avatar
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1 vote

More current draw from a power supply based on a voltage divider

What's the boost converter for? You already have +12V. Buck that down to +5V. And use an appropriate switcher (inverting charge-pump is probably best) to invert the +12V rail. No opamp or virtual ...
MOSFET's user avatar
  • 4,707
1 vote
Accepted

More current draw from a power supply based on a voltage divider

You can follow the opamp with a transistor buffer as seen here. This will take the load off of the opamp and increase the available current. You'll probably want a circuit that includes the ...
GodJihyo's user avatar
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1 vote

How to connect 3V dc motor to 5V power source?

For me the point is to use basic building blocks like resistors, diodes, etc to build an intuition of how to make circuits the right way... You might consider substituting diodes here to reduce 5V to ...
glen_geek's user avatar
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1 vote

Can I use a buffer on my bias voltage net?

With the passive design, using just a resistor divider and some capacitors to keep the "fake" ground voltage steady at +4.5V, you need to be careful not to load it in any way, since drawing ...
Simon Fitch's user avatar
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