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RP CHG r02

curtisseizert·LowFreqLNA·RP_CHG_r02/RP_CHG_r02.kicad_pcb

RP CHG r02 PCB layout, top view — open source board by curtisseizert
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About the RP CHG r02 PCB

RP CHG r02 is an open source PCB design by curtisseizert, published on GitHub under the MIT license. It is a 4-layer board measuring 105.4 × 54.6 mm, with 50 components from 31 distinct parts.

Other key parts include the BQ24618. By type, the board carries 20 resistors, 15 capacitors, 4 transistors, 4 diodes, 2 connectors and 1 IC.

It belongs with the audio and power & battery designs in this gallery.

From the project

A 0.01Hz-1+MHz low noise amplifier

Current Status -------------- I have made two of these and have done a fair amount of testing to nail down root causes of some of the issues (see later in this readme) that have proven to be a bit of a nuisance. I am also moving things around a bit on the battery and battery charger boards to allow a board-to-board connection of the two and increase the clearance between the battery board and the amplifier board. I have also tested improvements to the input stage that significantly reduce the low frequency noise, lowering the 1/f corner to <1 Hz. These are detailed in the issues section #7.

Main components on the RP CHG r02

BQ24618

RP CHG r02 bill of materials (BOM)

50 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BQ24618
U1
2
SiS443DN
Q1, Q2
2
SiS106DN
Q3, Q4
1
Barrel_Jack
J1
1
Molex Micro-Fit 3.0 43045-0610
J2
1
MountingHole
H5
1
G6K-2
K1
1
SW_SPDT
SW1
2
LED
D1, D2
2
NSR0340
D3, D4
1
8.2uH
L1
1
1uF X7R
C1
1
2.2uF
C2
6
0.1uF
C3, C5, C6, C8, C11, C12
1
47nF C0G
C4
1
1uF
C7
1
1uF X5R
C9
1
10uF
C10
2
10uF
C13, C14
1
22pF
C15
Show 11 more
QtyPartRefs
3
20k
R1, R2, R7
1
750R
R3
7
100k
R4, R5, R6, R8, R12, R14, R20
1
22k
R9
1
249k
R10
1
49k9
R11
1
2R
R13
1
1k
R15
1
10R
R16
2
0R01
R17, R18
1
698k
R19

RP CHG r02 design files

The KiCad project lives in the curtisseizert/LowFreqLNA repository on GitHub; these links point at the commit this page was built from.

RP CHG r02: common questions

How big is the RP CHG r02 PCB?

The RP CHG r02 measures 105.4 × 54.6 mm, has 4 copper layers and is 1.57 mm thick.

How many components are on the RP CHG r02?

50 components, from 31 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the RP CHG r02 design files?

From the curtisseizert/LowFreqLNA repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the RP CHG r02 design in my own project?

Yes, under the terms of its MIT license, which curtisseizert chose for the repository.

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