HardLabs

Jalapeno

GeeWizWow·Jalapeno

Jalapeno PCB layout, top view — open source Nordic nRF board by GeeWizWow

About the Jalapeno PCB

Jalapeno is an open source Nordic nRF PCB design by GeeWizWow, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 230.1 × 77.6 mm, with 184 components from 75 distinct parts.

Its main chip is the MDBT40, from the Nordic nRF family. Other key parts include the ATMEGA32U4-AU, SPX3819M5-L-3-3 and MCP73831T-2ACI/OT. By type, the board carries 47 relays, 42 diodes, 10 LEDs, 9 resistors, 7 capacitors and 4 ICs.

It belongs with the iot & wireless and keyboards designs in this gallery.

From the project

Jalapeno BLE - A 40% staggered bluetooth keyboard

Raytac MDBT40 spec sheet Adafruit feather 32u4 schematic KLE Layout Adafruit NRF51822 Flasher * Render KLE

Jalapeno, from the project README
From the project README

Main components on the Jalapeno

ATMEGA32U4-AUMDBT40SPX3819M5-L-3-3MCP73831T-2ACI/OT

Jalapeno bill of materials (BOM)

184 components, 75 distinct parts.

QtyPartRefs
1
ATMEGA32U4-AU
IC1
1
MDBT40
U1
1
SPX3819M5-L-3-3
U2
1
MCP73831T-2ACI/OT
U3
1
MMBT2222ALT3G
Q1
1
XTAL_GND
Y1
1
USB_B
J1
1
AVR-ISP-6
J2
1
Conn_01x04
J3
8
0.1uf
CR1, CR2, CR3, CR4, CR5, CR6, CR7, CR8
1
MBR120
DB1
1
CC logo
G3
1
Copyright
G4
5
Mounting_Hole
H1, H2, H3, H4, H6
1
JST_BAT
JST1
1
esc
K1
1
q
K2
1
w
K3
1
e
K4
1
r
K5
Show 55 more
QtyPartRefs
1
t
K6
1
y
K7
1
u
K8
1
i
K9
1
o
K10
1
p
K11
1
back
K12
1
tab
K13
1
a
K14
1
s
K15
1
d
K16
1
f
K17
1
g
K18
1
h
K19
1
j
K20
1
k
K21
1
l
K22
1
;
K23
1
caps
K24
1
caps
K25
1
z
K26
1
x
K27
1
c
K28
1
v
K29
1
b
K30
1
n
K31
1
m
K32
1
,
K33
1
,
K33_1
1
.
K34
1
.
K34_1
2
ctrl
K35, K41
2
gui
K36, K39_1
1
alt
K37
1
alt
K37_1
1
space
K38
1
space
K38_1
1
alt
K39
1
gui
K40
1
KEYSW
K42
42
330
RK1, RK2, RK4, RK5, RK6, RK7, RK8, RK9 +34
1
SW_PUSH
SW1
8
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8
1
CHG
LED1_0
1
CONN
LED2_0
42
D
D1, D2, D3, D4, D5, D6, D7, D8 +34
3
1uF
C1, C2, C7
3
10µF
C3, C5, C6
1
10uF
C4
1
2.2k
R1
1
1k
R2
3
10k
R3, R7, R8
2
22ohm
R4, R5
1
100k
R6
1
1.5k
R9

Jalapeno design files

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

Jalapeno: common questions

What microcontroller does the Jalapeno use?

The Jalapeno is built around the MDBT40, from the Nordic nRF family.

How big is the Jalapeno PCB?

The Jalapeno measures 230.1 × 77.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Jalapeno?

184 components, from 75 distinct parts. The full bill of materials is listed on this page.

Where can I download the Jalapeno design files?

From the GeeWizWow/Jalapeno repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Jalapeno design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Jalapeno without the hardware?

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

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