Charge Pump Board + Muriodea

[y-u-no-f800b]

I'm gonna build an 18v rat using the Muriodea board and the 3pdt charge pump board. Since there's no build doc for the latter, I could use some help. First, are there redundant components between the two boards? Like, does the charge pump board have a polarity protection diode, and does that mean I should omit the one on the Muriodea pcb? Is this the case with any capacitors?

I've already got the board on my desk. I'm also not sure what to make of the multiple in/out and +/- holes. I was able to find in another forum post that the board is meant to take a mini spst switch on the right (something i didn't know about without a bom) or can be run at a fixed voltage at the bottom right. I'll just stick with the fixed 18v. Since that's the case, are there any parts on the charge pump board that i should omit, besides the spst, or are they all necessary?

I've had a great time building the Antithesis, Squidward, and others so for. Hoping to keep the streak of good builds going!

P.S. All my caps are 25v or higher. Thanks!

 

[Robert]

You don't need the two capacitors circled in red, those are only for the negative voltage inverter.

If you want switchable 9V / 18V operation connect the pads marked "DC OUT" to the Muroidea +/- pads.
This is the switch I've used for the selector.

Mini Slide Switch 1P2T Through Hole 0.2A 24VDC

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Otherwise, if you want straight 18V operation use the "FIXED +18V" pad and "DC OUT -" pad to connect to the Muroidea +/- pads.

You can omit the 1N5817 polarity protection diode on the Muroidea PCB.


Also, you might want to install the electrolytic capacitors on the back of the PCB, there isn't much clearance between the PCB and the enclosure lid since it's mounted on the 3PDT footswitch. The caps are marked on the opposite side of the PCB as well.

 

[y-u-no-f800b]

"Big McThankies from McSpanky's" for the quick reply! That answered my questions entirely. Also thanks for that last heads-up about installing the 'lytics on the other side. Definitely prevented a potential future headache on my part!

 

[Robert]

They'll usually fit, but it's close. Best to just avoid any problems from the start.