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Topic: Voltage Doubler Board Layout Questions (Read 2 times) previous topic - next topic

Mike.LiquidC3

Hello,

I am new to the world of electronics, and I find it fascinating, but confusing.  I am have done many of the examples in the Arduino tutorials and they are very helpful.  Now I'm trying to go from a schematic to board layout for a Voltage Doubler and am having hard time getting this one right.  Each attempt yields one of two results, either: a) a dead/incomplete/incorrect circuit (0 Vout) or b) vOut = vIn.

I have picked what looks like a simple example:

Voltage Doubler @ http://www.coolcircuit.com/circuit/voltage/

If someone could provide a picture of what the board layout would look like for the Voltage Doubler @ http://www.coolcircuit.com/circuit/voltage/ I think I may be able to move on to the Voltage Tripler and then on to the Voltage Quadrupler.

I know there are IC's that do this, but I wouldn't be learning how to translate schematic to circuit board.

Attached is the schematic of the Voltage Doubler I am trying to create on a bread board using an Arduino for Vin.

Guidance is much appreciated.

Thanks,
-Mike

Terry King

Hi Mike,

Glad to see you are really experimenting and not just hooking up stuff other people designed.

The circuit you show is based on the the idea that the INPUT to it is constantly being switched between V+ and Ground or common.

So just take the BLINK example, change the delays to about 1/100 of a second (10 ms) and connect that output pin to your circuit.

BUT (There's always a but in electronics, it seems) Look closely at the first two circuits on CoolCircuit.

- The first one has outputs that are NOT connected to either Arduino +5 or Ground, but are 'floating'.. and you would have to measure the voltage between those two isolated points.

  - The Second circuit (Cascade) DOES have a common ground with Arduino ground and should put out +10 Volts relative to ground.

To really understand what these circuit do, it Would BE Great to have or borrow an oscilloscope to see the waveforms. Maybe you can bring your whole Arduino and Circuit in to a school / university / business Lab. I bet guys would help you, and you'd make some good (people) connections.

But keep on working through the "not working" frustrating times.  Some of us have worked on stuff like this for WEEKS and not gone (to us) crazy in the process.


Regards, Terry King  ..On the Red Sea at KAUST.edu.sa
terry@yourduino.com  LEARN! DO! (Arduino Boards, Sensors, Parts @ http://yourduino.com

Grumpy_Mike

Quote
Each attempt yields one of two results, either: a) a dead/incomplete/incorrect circuit (0 Vout) or b) vOut = vIn.


What voltage are you feeding into it? This circuit will only work if you feed it an AC signal. They won't work if you just feed a DC voltage into them.
If you want to use a circuit like this (it is called a diode pump) from DC the you have to make it into AC first by making an oscillator and driving this circuit with the oscillator. The oscillator has to have complementary outputs, that is when one is high the other is low.
As you say there are chips that do this. Note however that the current you get out of circuits like this is quite small, in the region of several tens of mA at most.

Mike.LiquidC3

Thanks.

I didn't realize the input was AC, and after reading more - I'm not ready to mess around with AC yet.

I think for now I'll play around with this: Darlington transistor (http://en.wikipedia.org/wiki/Darlington_transistor)

-Mike

weirdo557

not ready to mess around with AC? its not going to bite you or anything

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