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GB for Simple Cap-Mx Regulated Low-Noise PSU
GB for Simple Cap-Mx Regulated Low-Noise PSU
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Old 14th March 2019, 02:28 PM   #41
xrk971 is online now xrk971  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
GB Status Update

Quote:
DrPro - 2 boards - USA = Paid
Vunce - 2 boards - USA = Paid
goldkenn - 4 boards - Hong Kong = Paid
Yatsushiro - 2 boards - France = Paid
Mindfunk - 4 boards - Germany = Paid
maartn - 3 boards - Netherlands = Paid
ericimage2 - 2 boards - USA = Need PayPal Address
Roundtoit - 2 boards - USA = Paid
Kokanee - 2 boards - Canada = Paid
Spind - 2 boards - Canada = Paid
Thank you to everyone for providing payment. i will start shipping the boards shortly.
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Old 17th March 2019, 10:05 PM   #42
twocents is offline twocents  South Africa
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GB for Simple Cap-Mx Regulated Low-Noise PSU
Default RPi power

For my TDA1387 RPi HAT DAC build I finished the second XRK Simple Cap-Mx Regulated Low-Noise PSU v1 beta board yesterday. On this board I used a MC7805CTG 5V (10uV output noise) regulator for powering a Raspberry Pi 2B. I wanted a PSU that can deliver a little more than 1A for the RPi, so I used a (huge) 1mH 2.5A inductor for L101. It works great. The MC7805CTG regulator is pretty accurate, giving a stable 5.04V. My RPi runs headless with only a USB WiFi dongle, and this PSU seems to drive my RPi perfectly for the purpose. The HAT DAC board is powered separately with another of XRKs PSU v1 beta boards with a TPS7A4701 (4uV output noise) regulator.

With the DAC output to my PCA (Class A) headamp and powering the RPi with this second low noise PSU (through the RPi GPIO header pins) results in absolutely no noise. Absolutely dead quiet with the volume on max, where previously when using the standard Raspberry supplied psu there was some feint background noise on full volume.

This is a truly budget setup that sounds absolutely stunning to my ears. Thank you X for such an effective, simple and cheap solution!
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Old 17th March 2019, 11:01 PM   #43
xrk971 is online now xrk971  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
Hi Twocents,
Very nice build and good idea to try a MC7805CTG to get higher current and low noise. Great news to hear that this simple little PSU is doing what it was designed to do. Your idea of calling it the SCAMULON is great.

S(imple) CA(p) MU(ltiplier) LO(w) N(oise)

So SCAMULON it is.

I actually use a 1mH on mine too and it doesn’t hurt, as long as the choke doesn’t saturate at the DC level you are using.
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Old 20th March 2019, 06:23 PM   #44
ymwong is offline ymwong  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
Is it too late to take part in this GB?

ym
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Old 20th March 2019, 06:31 PM   #45
xrk971 is online now xrk971  United States
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No, please send me a PM with your PayPal info, number of boards desired, and location to ship to. I will send you invoice.
Thanks,
X
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Old 20th March 2019, 07:54 PM   #46
maartn is offline maartn  Netherlands
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Hi XRK, I want to use the board to power an RPI at 5v, so I plan to use 7805. Any changes to the BOM or value of L101 (10uH) in that case?
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Old 20th March 2019, 08:02 PM   #47
xrk971 is online now xrk971  United States
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No, but it doesn’t hurt to use a larger choke. A toroidal wound one can get quite a bit higher and provide improved filtering. You might want to use the MC7805CTG that Twocents used in above post. That seemed to work pretty well for a RPi.
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Old 20th March 2019, 08:19 PM   #48
wealas is offline wealas
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New name sounds too close to scam to me
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Old 20th March 2019, 08:33 PM   #49
xrk971 is online now xrk971  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
How about X’s Low Cost Low Noise (XLCLN) Reg?

XLCLN Regulator.
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Old 21st March 2019, 04:32 AM   #50
xrk971 is online now xrk971  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
GB Status Update:

Quote:
DrPro - 2 boards - USA = Shipped
Vunce - 2 boards - USA = Shipped
Yatsushiro - 2 boards - France = Shipped
Mindfunk - 4 boards - Germany = Shipped
maartn - 3 boards - Netherlands = Shipped
ericimage2 - 2 boards - USA = Need PayPal Address
Roundtoit - 2 boards - USA = Shipped with Alpha 20 and Melbourne
Kokanee - 2 boards - Canada = Paid, combine shipment with Yarra & Melbourne
Spind - 2 boards - Canada = Shipped
Goldkenn - 4 boards - HK = Paid, Please confirm correct shipping address in PayPal
Ymwong - 4 boards - USA = Shipped
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