Designing power section for a phaser.

[leadfoot]

I've been messing around with the TAPFLO3D chip for running PT2399 delays and decided I really wanted to just build an old school 12 stage optical phaser that is a blend of the Compact Phasing A with a TAPFLO3D to drive the LEDs or bulbs (haven't decided yet) and running the op amps at +/-9v. To do this, I've got to get: 9v (easy), 5v (easy), -9V (also easy with a 1054) but when I design the schematic, it just seems overly messy. So, I'm throwing this out there.. how would the PedalPCB Hive Mind get these voltages stable and with an elegant power design? I feel mine is a bit heavy handed.

To add a bit more to this, I'm wanting to design this as a sandwiched board design with the power and controls on one board and then the phaser on the other board with the appropriate +/- 9V coming to it along with the voltage to drive the leds.

 

[z2amiller]

Honestly this looks like a pretty standard power section to me. You could save some space by going SMD,
especially if you're doing sandwiched boards if you need more vertical space. SMD caps and chips are going
to be half the height or less.

In KiCad you can have 'design blocks' that you can save and use on different designs, and my
'power section' looks a lot like this. (I have several 'design blocks' for power, one with voltage
divider for vref, one with 5V regulator, one with a charge pump, etc)

Make sure you pay attention to power draw. IIRC this charge pump maxes out at about 100mA. LEDs can
draw 10-20mA so you might want to be cautious about that if you're driving them with -9V from the charge pump.
(It's probably fine in a phaser when not all of them will be on at the same time)

 

[leadfoot]

Agreed, I figured it's relatively straightforward but I wanted to make sure I wasn't doing something absolutely stupid. The LEDs will be driven by the 5v regulator which should not be an issue. The power draw for 8 op amps is within spec too.