HardLabs

BivalveBit RevF

millerlp·BivalveBit_hardware·Hardware/BivalveBit_main_board_KiCAD/BivalveBit_RevF/BivalveBit_RevF.kicad_pcb

BivalveBit RevF PCB layout, top view — open source AVR/Arduino board by millerlp

About the BivalveBit RevF PCB

BivalveBit RevF is an open source AVR/Arduino PCB design by millerlp, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 89.9 × 17.8 mm, with 57 components from 32 distinct parts.

Its main chip is the ATMEGA4808-A, from the AVR/Arduino family. Other key parts include the LP5907MFX-3.0 and BJT_NPN. By type, the board carries 18 resistors, 10 capacitors, 5 connectors, 3 ICs, 3 transistors and 2 jumpers.

It belongs with the wearables and sensors designs in this gallery.

From the project

Heart rate and valve gape sensor wearable for oysters and mussels

Based around a ATmega4808 microcontroller Designed to fit inside a nominal 3/4" schedule 40 PVC plumbing pipe (<18.5mm inside diameter) along with an 18650 size Lithium-Ion battery cell. Provides one I2C 4-pin port for communicating with a IR heart rate sensor Provides one analog 4-pin port for communicating with an analog sensor such as the A1395 Hall effect sensor (with SLEEP pin on the 4th wire). * Writes data to a standard microSD card

BivalveBit RevF, from the project README
From the project README

Main components on the BivalveBit RevF

ATMEGA4808-ALP5907MFX-3.0BJT_NPN

BivalveBit RevF bill of materials (BOM)

57 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA4808-A
ATmega4808-A
U2
1
LP5907MFX-3.0
U3
1
BJT_NPN
U4
2
BSS138
Q1, Q2
1
P-FET
Q3
4
Conn_01x01_Male
J4, J5, J7, J8
1
Conn_01x03_Male
J6
1
SSP-T7-F
Crystal_32.768kHz1
1
CONN_01X06
Conn_01x06
FTDI1
2
Conn_01x04_Male
HALL_SENSOR1, HEART_SENSOR1
2
SolderJumper_3_Bridged12
JP1, JP2
1
CONN_01X04
Conn_01x04
OLED1
1
Conn_01x02
PRIMARY_BATTERY1
1
TC2030-IDC-NL-UPDI
PROGRAM_HEADER1
1
PTS525SM15SMTR2LFS
RESET1
1
MCP79400
RTC1
1
Battery_Cell
RTC_BATT1
1
SW_Reed
SW2
2
TestPoint_Probe
TP1, TP2
1
47219-2001
microSD1
Show 12 more
QtyPartRefs
1
GRNLED
D1
1
REDLED
D2
5
0.1UF
0.1uF
C1, C2, C4, C6, C8
2
1UF
1uF
C3, C5
1
10UF
10uF
C7
2
4-16PF
4-16pF
C9, C10
6
10K
10k
R1, R2, R9, R11, R13, R15
3
100K
100k
R3, R6, R8
4
2.2K
2.2k
R4, R5, R16, R17
2
100OHM
100ohm
R7, R18
2
47k 1%
R10, R12
1
0Ω
R14

BivalveBit RevF design files

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

BivalveBit RevF: common questions

What microcontroller does the BivalveBit RevF use?

The BivalveBit RevF is built around the ATMEGA4808-A, from the AVR/Arduino family.

How big is the BivalveBit RevF PCB?

The BivalveBit RevF measures 89.9 × 17.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BivalveBit RevF?

57 components, from 32 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 BivalveBit RevF design files?

From the millerlp/BivalveBit_hardware 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 BivalveBit RevF design in my own project?

Yes, under the terms of its GPL-3.0 license, which millerlp chose for the repository.

Can I test firmware for the BivalveBit RevF without the hardware?

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

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