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RF HAT

Just4Stan·SatNOGS-Basestation·RF_HAT/RF_HAT_out/RF_HAT.kicad_pcb

RF HAT layout, top view — open source RP2040/RP2350 board by Just4Stan
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About the RF HAT

RF HAT is an open source RP2040/RP2350 PCB design by Just4Stan, published on GitHub. It is a 6-layer board measuring 32 × 65 mm, with 105 components from 46 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. Other key parts include the CC1200RHBR, XT30PW-M and LMR51420YFDDCR. By type, the board carries 59 capacitors, 17 inductors, 10 resistors, 6 diodes, 5 ICs and 5 connectors.

It belongs with the rf & radio, dev boards & breakouts and power & battery designs in this gallery.

From the project

RP2040-based AZ/EL rotator controller for SatNOGS-compatible satellite ground stations. Custom PCB, PID motor control, EasyComm/hamlib protocol over USB.

KiCad 9.0 project for a Raspberry Pi 3A+ HAT with two TI CC1200 transceivers (UHF 432 MHz + VHF 144 MHz), controlled by a Raspberry Pi Pico over SPI. Part of the SatNOGS Basestation project.

A rough estimate for 1 board, assembled by JLCPCB, for 10 units, is 20USD per board. This converges to 10USD in larger quantities.

Power: External buck converter provides 5V through a Schottky diode to the Pico's VSYS pin (USB can power simultaneously via internal Schottky OR-ing). Pico's onboard RT6150 regulator provides 3.3V for both CC1200s.

Main components on the RF HAT

CC1200RHBRRaspberryPi_PicoXT30PW-MLMR51420YFDDCR

RF HAT bill of materials (BOM)

105 components, 46 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
CC1200RHBR
U1, U2
1
RaspberryPi_Pico
U3
1
XT30PW-M
U4
1
LMR51420YFDDCR
U5
1
BSS138
Q1
2
40MHZ
40MHz
Y1, Y2
2
SMA
J1, J2
1
RASPBERRY_PI_2_3
Raspberry_Pi_2_3
J3
2
CONN_01X01
Conn_01x01
J4, J5
1
C3759853
D_Schottky
D1
1
1N4148WS
D2
4
WS2812B-2020
D3, D4, D5, D6
2
15NH
15nH
L1, L5
1
43NH
43nH
L2
2
22NH
22nH
L3, L14
2
56NH
56nH
L4, L7
2
27NH
27nH
L6, L8
3
100NH
100nH
L9, L10, L12
1
47NH
47nH
L11
1
270NH
270nH
L13
Show 26 more
QtyPartRefs
1
120NH
120nH
L15
1
82NH
82nH
L16
1
XRTC303020D4R7MBCA
L18
1
2.2PF
2.2pF
C1
1
39PF
39pF
C2
3
5.1PF
5.1pF
C3, C8, C9
1
6.2PF
6.2pF
C4
1
56PF
56pF
C5
4
10NF
10nF
C6, C16, C31, C41
5
100PF
100pF
C7, C38, C39, C43, C47
1
1NF
1nF
C10
8
15PF
15pF
C11, C12, C13, C20, C27, C32, C45, C46
22
47NF
47nF
C14, C15, C21, C25, C26, C28, C29, C30 +14
6
220NF
220nF
C17, C34, C48, C49, C50, C51
1
1.5NF
1.5nF
C18
1
C98192
4.7uF 50v
C19
1
100N
100n
C22
1
1.8NF
1.8nF
C23
1
22UF
22uF
C24
1
1.5PF
1.5pF
C44
4
10K
10k
R1, R2, R4, R5
2
56K
56k
R3, R7
1
18R
R6
1
22R
R8
1
100K
100k
R16
1
13.7K
13.7k
R17

RF HAT design files

The KiCad project lives in the Just4Stan/SatNOGS-Basestation repository on GitHub; these links point at the commit this page was built from.

RF HAT: common questions

What microcontroller does the RF HAT use?

The RF HAT is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the RF HAT?

The RF HAT measures 32 × 65 mm, has 6 copper layers and is 1.146 mm thick.

How many components are on the RF HAT?

105 components, from 46 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 RF HAT design files?

From the Just4Stan/SatNOGS-Basestation 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 RF HAT design in my own project?

The repository has no license, so all rights stay with Just4Stan. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the RF HAT without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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