diy device to increase 9v to 12v??

[jamiefbolton]

So I want to use my 12v pedals and not use the wall warts. i've seen things such as the Godlyke Power Pump which increases up to 18v.  the PP is really small so it can't be too difficult i wouldn't think. anybody know how to do this as DIY?

jamie

[John Lyons]

Here you go.
http://www.geofex.com/circuits/+9_to_33.htm

May as well go up to 18v....

[JKowalski]

Look up "Charge Pumps". They are basically one-chip DC to DC converters.

Here is an example:

http://www.spezial.com/doc/maxim/icl7660-max1044.pdf

Go down to the circuit examples, figure 9. The charge pump will give you twice the input voltage, minus two diode drops. Use this simple circuit, plus a 12V three terminal regulator and you are set.

Charge pumps often introduce high frequency noise into your power supply, but since:

A: The charge pump will be far removed from the pedal
B: The regulator will help
C: You can add simple filtering if it is noticable
D: Many pumps are designed to use frequencies above the range of hearing

That shouldn't be a problem.

The chip that I suggested was just the only one I had off the top of my head, there are many more, perhaps better quality then the 1044. Take a look around.




Ah, someone beat me to it. Hopefully I have some useful info in my post too 

[John Lyons]

But your post spells it out more 

[earthtonesaudio]

There are some DIY switching power supplies floating around the internet, most use 555's.  Usually you can adjust one component to get the output voltage you want.
They're more complex, but higher current capability compared to charge pumps.

[jamiefbolton]

I've been reading the stuff you guys posted. Here is the actual senario.

I'm using the GigRig Generator to power everything. But I have two TC Nova pedals.  I've heard they require 400ma to startup and 300ma to operate. This is true to my knowledge.I can't use both on my Godlyke Power Pump. The PP only supplies up to 500ma. Anyway. I'll need I guess two of these capable of atleast 400ma.

The stuff so far will not produce 400ma. But, I'm new to this so I'll need some step by step help.

Thanks Guys. I appreciate your help.

Jamie

[earthtonesaudio]

There are some DIY switching power supplies floating around the internet, most use 555's.  Usually you can adjust one component to get the output voltage you want.
They're more complex, but higher current capability compared to charge pumps.

Charge pumps are typically used for low current/high voltage apps.  Flyback, forward, buck, or buck/boost converters are typically used at modest voltages where more current is needed.

[brett]

Hi
for such high current consumption, you'd be best off getting a dedicated wall-wart. 
If $$ are an issue, catch a bus or walk to the local charity shop and you should get one for less than $5.  I mostly get them for $1.
cheers