Aron Nelson Vdub not working properly, help please!

[Valoosj]

Last night I made the Voltage doubler by Aron Nelson, and it is actually making me lose 1V instead of gain 9.

http://www.diystompboxes.com/pedals/vdbl.html This is the schematic, and this is the layout I used.

The connections are from left to right: 18V, 9V and GND.


This is not my first project so don't tell me to go check my soldering 
Is my layout wrong (even though I doubt that since this is super easy.)

[Zben3129]

Did you use sockets?

[Valoosj]

Yes.

[sean k]

On the page the link goes to it says the IC is connected as looking from the back but the little 0 that would supposedly make pin 1 is actually in the place where pin 1 would when looking from the top. If I were you I'd get the data sheet for the IC and make sure things arent confused by checking the IC intended uses. I've got an idea that if you switch the socket to the other side you will get it working.
Just a flip and no turning.

Indeed, when you check the data sheet a very similar schematic is on page 9 and the V+ goes to pin 8 but on yours you have it going to pin 1.

[dxm1]

Yup - this circuit is straight out of the Intersil datasheet. Pin 8 to Vcc, pins 3 and 5 to ground, etc. The IC is backwards.

[Auke Haarsma]

1) Don't forget to activate the 'freq boost' by connecting Pin 1 and Pin 8.

2) Read Geo: http://geofex.com/circuits/+9_to_33.htm

Gl Yorick!

[Valoosj]

I thought that was only necessary when you hear a high screech coming through in the audio signal.
Last night I was thinking about the fact that it says the IC is looked upon from the bottom, but the dot threw me off.

[Valoosj]

Ok, I've resoldered the IC, and I connected pin 1 to pin 8.
It now looks like this.


Still nog 18V, only 16,22V.

Any ideas? Someone (Dirk Hendrik) once mentioned to me that the schematic is not correct to get 18V.

[kurtlives]

16.22V is pretty close...

Could this be attributed to the tolerances of the cap?

Is that voltage while under load? What is the input supply voltage?

[slacker]

16 and a bit volts is correct, for 9 volts in. The output voltage is  twice the input voltage minus the voltage dropped by the 2 diodes, it's all explained in the datasheet

[aron]

Thanks guys. I also noticed that he directly grounded R1. It's been so long since I used this circuit. I can't remember much about it. I started using an 18V adaptor with voltage regulator after a while.