A while back I made a clone of Mark Johnson's P089ZB SMPS DC filter in a form factor for use on top of a Raspberry PI. The filter accepts power in either through a euroblock or USB-C, and gives power out through another euroblock, a pin header, or the appropriate pins of a GPIO header. The GPIO header can provide power for RPis that have the HiFiBerry "HAT" devices. There are two jumpers to completely disconnect the GPIO header from + and - on the filter as well. Even though this implementation is amenable to use with a RPi, it is also usable in applications where a P089ZB filter is appropriate, e.g. up to 48V or 3A. Since the store is apparently out of these, and since I have only one RPi now, I have an extra for sale. It has the GPIO header installed in the position to give power to a HAT, as shown.
$10 + $5 for US domestic shipping.
I also have one unpopulated PCB left that contains only the SMT USB-C port. That's free for $5 US domestic shipping as well.
$10 + $5 for US domestic shipping.
I also have one unpopulated PCB left that contains only the SMT USB-C port. That's free for $5 US domestic shipping as well.
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Very admirable of you to offer your extra boards at cost, with no markup! Thank you from the entire diyAudio community.
Will that function just exactly the same as the SMPS DC filter being sold in the DIYstore?
Meaning, can it be used for a Korg B1 Nutube preamp for example?
Meaning, can it be used for a Korg B1 Nutube preamp for example?
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I am interested in this and will make a deal with RXV if you want a standard version as sold by the store. I'll send you an assembled (or unassembled if you prefer) P089ZB SMPS DC filter as Mark designed them for the same price. I had PCBs made and have extras plus parts. Just pay ranshdow the $15 so we save fees from multiple transactions and we can work the deal.
If RXV is not interested I'll still purchase the board ranshdow.
If RXV is not interested I'll still purchase the board ranshdow.
It should, it's the same circuit, albeit without the ground planes that the official boards and Gerbers have. One can think of this board as analogous to point-to-point wiring of the same circuit.
Tbh I never tested one of these boards with by B1 Korg when I had it, or with my B1 buffer. I'm not sure I have the adapters to do so without cutting apart the PO89ZB I use with my B1 buffer.
Hi,
@ranshadow I believe spiigs would need this more than I would. It would be a shame if your board would not be utilized for RPi use, as it was intently designed for, with all the effort and extra parts put into it
@spiggs I sent you a private message. Let's see if we can sort things out
@ranshadow I believe spiigs would need this more than I would. It would be a shame if your board would not be utilized for RPi use, as it was intently designed for, with all the effort and extra parts put into it
@spiggs I sent you a private message. Let's see if we can sort things out