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Peter Rutter has just launched an Indiegogo fund raising campaign to hopefully get the cash together to purchase the license rights to the Silent True Bypass Relay Switching code that programs all the PIC Microcontrollers used in the VFE effect pedals. To me these VFE PIC MCU's are one of the best for true bypass silent relay switching that are on offer, and while a little similar to the Free code offered by Coda for similar purpose, the VFE PIC works differently than the Coda and is useful in ways that the Coda cannot achieve.. I know that you can write your own code easy enough for a required switching situation, or you can pay someone to write it for you. But what Peter has in mind if he gets the funds together to purchase the PIC MCU license rights, is to make his particular PIC MCU code available for free to all DIY Pedal builders just like the Coda code is presently available.
This simplifies things a lot for those who don't wish the extra curricular of learning to Code Micro Chips.
Making accesable a quality PIC MCU code easy and readily available for use in not only VFE effects but all and any and every effect where you want true bypass with silent quite relay switching incorporated.
This is very altruistic of Peter Rutter giving back yet again to the DIY community, so would encourage any and all with an interest in such things to have a look at the Indiegogo campaign and hopefully be inclined where able to support him in his quest.

https://www.indiegogo.com/projects/help-vfe-pedals-make-diy-available-to-everyone#/


Cheers, Trevor T.

Hello Fellow Board Members, 
                                             I am in a bit of a quandry, trying to properly figure just how to correctly convert the Boss FA-1 circuit from single 9 Volt supply to a Dual rail +/- 9 volt supply with a centre 0v ground. I realize I shall need an appropriate charge pump to get the dual supply, but really need help to identify just which of the original grounds become -9volt and which stay as 0 volt ground, I understand that the op amp half supply voltage goes to 0 volt just mainly curious on the section circled in orange trying to get my head around, particularly where the 3M3 resistor is supposed to end up either 0V ground or -9volt? also the 1M pull down resistor does it go to -9volt or 0 ground? I see that also the voltage dividing network in there can probably be scrapped. Just need some sound advice on the matter. the rest of the circuit seems a bit more straight forward, but please chime in with every detail needs correcting for dual +/-v supply. Any and all advice is greatly appreciated

Please see attached FA-1 Schematic.


Thanks for your support.

Best Regards,

TTay

I am looking to do the Boss FA-1 circuit only I wanted to do it with a dual rail +9v -9v power supply, or possibly even up to +15v -15v. I just need some education on what changes to the circuit need doing and where exactly the negative volt rail, the positive rail and the 0v needs placing, and also what in particular is now ground reference? is it 0v or -9v The circuit image is shown below. Thanks for any insight and instruction into the matter. Cheers, Trevor

  Thanks