Hi Guys,
I'm getting ready to build a Maestro FSH from this layout: http://www.sabrodesign.com/wp-content/uploads/2010/09/Oberheim-VCF.gif (http://www.sabrodesign.com/wp-content/uploads/2010/09/Oberheim-VCF.gif) and the build docs call for bipolar power. I've never put anything together that requires bipolar power, would someone be able to give me a tip on what from the Road Rage would get connected to what on the vero layout in order to bipolar-ize it? I would really appreciate it!!!
thanks!!
Easy to do: connect +9v and ground from the DC jack to the RR. There are two 9v and ground pads on the RR. Use the extra set to connect to +9v and ground on your vero. Connect the -9v from the RR to the appropriate place on the vero. You will also need to connect ground from the vero to you switch/jacks, etc as normal.
On the actuall RR board, you only need to add D3, C3 and C5. Leave the other components off (diodes, caps, regulator). Obviously, you need the charge pump.
OK, I'll admit I'm a clueless bastard when it comes to this. This is the schematic the vero was based on http://www.generalguitargadgets.com/diagrams/fsh1asc2.gif?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a (http://www.generalguitargadgets.com/diagrams/fsh1asc2.gif?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a) I remember reading somewhere that this circuit had a pretty high current draw and the GGG project (out of production) mentions that he used a charge pump for his build. Does the diode + 2 caps give me a bipolar charge pump or would the charge pump be a separate thing? Seems like the Road Rage does all the stuff I need but I'm just wondering if it would do it all at the same time?
thanks again for the help!