9v to 15v help
Hi everyone
Im a looking for some help .
I am building a few SDD-3000 pre-amps from the the design found on http://www.sabrotone.com.
I have the PCB designed apart from the power supply which uses a 9volt power supply.
The oringinal SDD-3000 used a 15v power supply,so I am wounding is there a low cost 9v to 15v converter or circuit that I could use?
I found the following page https://obsoletetechnology.wordpress.co ... ct-pedals/ but i cant find the LT3467's and as im new to this Im not sure if its what I need.
The finished SDD PCB has to fit in a hammond 125 enclosure as I bought 60 enclosure from China for all my projects ,so the power supply circuit cant be massive.
If anyone could help it would be greatly appreciated.
Also If anyone knows the SDD-3000 well could you let me know.
Thanks
Im a looking for some help .
I am building a few SDD-3000 pre-amps from the the design found on http://www.sabrotone.com.
I have the PCB designed apart from the power supply which uses a 9volt power supply.
The oringinal SDD-3000 used a 15v power supply,so I am wounding is there a low cost 9v to 15v converter or circuit that I could use?
I found the following page https://obsoletetechnology.wordpress.co ... ct-pedals/ but i cant find the LT3467's and as im new to this Im not sure if its what I need.
The finished SDD PCB has to fit in a hammond 125 enclosure as I bought 60 enclosure from China for all my projects ,so the power supply circuit cant be massive.
If anyone could help it would be greatly appreciated.
Also If anyone knows the SDD-3000 well could you let me know.
Thanks
- IvIark
- Tube Twister
Information
If you want to limit the output to 15V put a 15V zener between the 17V row and ground
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
Thanks IvIark
You saved me from going bald.I take it that its tested.
Call me thick,But if I dont ask I wont learn.
How does it double the voltage?Is it like a transformer? do I half the current by doubling the voltage?
Thanks again
You saved me from going bald.I take it that its tested.
Call me thick,But if I dont ask I wont learn.
How does it double the voltage?Is it like a transformer? do I half the current by doubling the voltage?
Thanks again
- IvIark
- Tube Twister
Information
This is how Intersil describe it and they're much more clever than me!
"The ICL7660S may be employed to achieve positive voltage doubling. In this application, the pump inverter switches of the ICL7660S are used to charge C1 to a voltage level of V+ -VF (where V+ is the supply voltage and VF is the forward voltage on C1 plus the supply voltage (V+) is applied through diode D2 to capacitor C2. The voltage thus created on C2 becomes (2V+) - (2VF) or twice the supply voltage minus the combined forward voltage drops of diodes D1 and D2."
"The ICL7660S may be employed to achieve positive voltage doubling. In this application, the pump inverter switches of the ICL7660S are used to charge C1 to a voltage level of V+ -VF (where V+ is the supply voltage and VF is the forward voltage on C1 plus the supply voltage (V+) is applied through diode D2 to capacitor C2. The voltage thus created on C2 becomes (2V+) - (2VF) or twice the supply voltage minus the combined forward voltage drops of diodes D1 and D2."
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
- Mbas974
- Resistor Ronker
7660 isn't enough... too low current.
L1054 the same
SDD3000 has a huge current demand (more than 100mA) so take a look to a Murata Converter from 5V to dula 15V ($20 approx...)
It's a great pedal !!
L1054 the same
SDD3000 has a huge current demand (more than 100mA) so take a look to a Murata Converter from 5V to dula 15V ($20 approx...)
It's a great pedal !!
- IvIark
- Tube Twister
Information
The SDD3000 may have a huge current demand but its pre-amp wouldn't.
http://analogguru.an.ohost.de/001/schem ... preamp.gif
http://analogguru.an.ohost.de/001/schem ... preamp.gif
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
One more question.
Can anyone tell me the input and output attenuator values as I cant make it out.
Here is the Korg service manual https://www.box.com/shared/2vqeduby80.
I know im asking a lot,but I need all the help I can on this.
Thanks again
Can anyone tell me the input and output attenuator values as I cant make it out.
Here is the Korg service manual https://www.box.com/shared/2vqeduby80.
I know im asking a lot,but I need all the help I can on this.
Thanks again
- roseblood11
- Tube Twister
What's so special about this simple circuit? Except from the fact that The Edge uses it?
It's a clean booster based on old and dead cheap opamps...
I would at least redraw the circuit for symmetrical power supply (and use the ICL7660S or MAX1044 as voltage inverter) and use higher quality opamps...
It's a clean booster based on old and dead cheap opamps...
I would at least redraw the circuit for symmetrical power supply (and use the ICL7660S or MAX1044 as voltage inverter) and use higher quality opamps...
It is not just a clean booster,it adds a (for want of a better word) colour to the tone.roseblood11 wrote:What's so special about this simple circuit? Except from the fact that The Edge uses it?
It's a clean booster based on old and dead cheap opamps...
I would at least redraw the circuit for symmetrical power supply (and use the ICL7660S or MAX1044 as voltage inverter) and use higher quality opamps...
I would upload a JPEG of my pcb so people could take a look, but I dont have a clue how to upload a picture.
- Duckman
- Opamp Operator
When you're writing a comment, see below "Upload attachment"Muiller wrote:I dont have a clue how to upload a picture.
just look for a picture in your computer and then click "add the file"