- #1
triden
- 174
- 0
Hi there,
For a personal project of mine, I have been designing a low-noise linear power supply to provide power to guitar effects pedals. A couple guitarists I know use a hodge-podge of AC adapters and switched PSU's to run their various pedals (sometimes 8 at a time). This mixture of devices is messy and I am working on a single unit to power all the pedals. They require fairly low voltage ~9v or so at maybe 300mA maximum.
I have started with a 120v transformer rectified and filtered into eight 78L09 voltage regs. The only problem is that each reg is not completely isolated because they share common grounds. I would like them 100% isolated so that noice on one pedal's supply doesn't effect the supply and therefore the "sound" on another.
Is there any way to do this in short of putting a transformer on each reg? Do you think I would get clean enough power without isolating each regulator?
Regards,
Christan
For a personal project of mine, I have been designing a low-noise linear power supply to provide power to guitar effects pedals. A couple guitarists I know use a hodge-podge of AC adapters and switched PSU's to run their various pedals (sometimes 8 at a time). This mixture of devices is messy and I am working on a single unit to power all the pedals. They require fairly low voltage ~9v or so at maybe 300mA maximum.
I have started with a 120v transformer rectified and filtered into eight 78L09 voltage regs. The only problem is that each reg is not completely isolated because they share common grounds. I would like them 100% isolated so that noice on one pedal's supply doesn't effect the supply and therefore the "sound" on another.
Is there any way to do this in short of putting a transformer on each reg? Do you think I would get clean enough power without isolating each regulator?
Regards,
Christan