HardLabs

Crocus

greatfet-hardware·crocus

Crocus PCB layout, top view — open source board by greatfet-hardware

About the Crocus PCB

Crocus is an open source PCB design by greatfet-hardware, published on GitHub under the BSD-3-Clause license. It is a 4-layer board measuring 70.7 × 53.3 mm, with 49 components from 18 distinct parts.

Other key parts include the nRF24L01+ and PCA9674. By type, the board carries 7 capacitors, 5 connectors, 5 resistors, 2 ICs, 1 crystal and 1 transformer.

It belongs with the rf & radio designs in this gallery.

From the project

a Nordic nRF24L01+ neighbor

https://github.com/greatscottgadgets/gsg-kicad-lib

If you are using git, the preferred way to install gsg-kicad-lib is to use the submodule:

Crocus is based on the Nordic RF nRF24L01+ and was inspired by The Next Hope Badge.

A notable capability of nRF24L01+ is 2 Mbps FSK. Many 2.4 GHz wireless transceiver ICs (including the CC2400 on Ubertooth One) only support FSK up to 1 Mbps. See Promiscuity is the nRF24L01+'s Duty for an excellent trick that can be done with Crocus.

Main components on the Crocus

nRF24L01+PCA9674

Crocus bill of materials (BOM)

49 components, 18 distinct parts.

QtyPartRefs
1
nRF24L01+
U1
1
PCA9674
U2
1
XTAL
Y1
1
NEIGHBOR1
J1
1
NEIGHBOR2
J2
1
BONUS_ROW
J7
1
RP-SMA
P1
1
EXPANSION
P2
4
MOUNTING_HOLE
MH1, MH2, MH3, MH4
1
BALUN
T1
24
TEST
W1, W2, W3, W4, W5, W6, W7, W8 +16
2
33nF
C1, C2
1
2.2nF
C3
2
18pF
C4, C5
1
10nF
C6
1
1nF
C7
1
22.0k
R1
4
10k
R2, R3, R4, R5

Crocus design files

The KiCad project lives in the greatfet-hardware/crocus repository on GitHub; these links point at the commit this page was built from.

Crocus: common questions

How big is the Crocus PCB?

The Crocus measures 70.7 × 53.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Crocus?

49 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the Crocus design files?

From the greatfet-hardware/crocus repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Crocus design in my own project?

Yes, under the terms of its BSD-3-Clause license, which greatfet-hardware chose for the repository.

Similar boards