HardLabs

Calve heater

R-Mutura·calve_heater·hardware/src files/calve_heater/calve_heater.kicad_pcb

Calve heater PCB layout, top view — open source AVR/Arduino board by R-Mutura

About the Calve heater PCB

Calve heater is an open source AVR/Arduino PCB design by R-Mutura, published on GitHub. It is a 2-layer board measuring 43.8 × 25 mm, with 56 components from 35 distinct parts.

Its main chip is the ATMEGA328P-MU, from the AVR/Arduino family. Other key parts include the BQ24075RGTR, TPS61230DRCR, EAST1616RGBA8 and LP3986-33B3F. By type, the board carries 24 capacitors, 17 resistors, 5 ICs, 3 connectors, 3 diodes and 2 transistors.

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

From the project

Hardware and software Implementation of a calf heater fabric

- Green = 40deg - Blue = 44deg - Red = 48deg The device uses PID control to warm up the fabric and maintain the desired temperature at all times ensuring safe.bumpless and comfortable use. When the battery level gets too low the RED led flashes at 1 sec intervals indicating need for charging. the device is charged via the Micro-USB port. During charging, 2 leds below the on button are used for monitoring. Red is constantly on if its connected to power, and the Green LED indicates charging status: - ON = CHarging - OFF = Done charging

Calve heater, from the project README
From the project README

Main components on the Calve heater

BQ24075RGTRTPS61230DRCRATMEGA328P-MUEAST1616RGBA8LP3986-33B3F

Calve heater bill of materials (BOM)

56 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BQ24075RGTR
BQ24075RGT
LCSC
U1
1
TPS61230DRCR
LCSC
U2
1
ATMEGA328P-MU
ATmega328P-MU
Digipart
U3
1
EAST1616RGBA8
Digikey
U4
1
LP3986-33B3F
LM1117-3.3
LCSC
U5
1
AP3401
FDN338P-NL
LCSC
Q1
1
SI2304BDS-T1-GE3
LCSC
Q2
1
X322516MOB4SI
LCSC
Y1
1
105017-0001
USB_B_Micro
Digikey
J1
1
Conn_out
Digikey
J2
1
C65114
ICSP_HEADER
LCSC
J3
1
BAT60B
D_Schottky_Small
LCSC
D1
1
HSMG-C190
GREEN
Digikey
D2
1
LTST-C190KRKT
RED
Digikey
D3
1
MWSA0518S-1R5MT
1.5uH
LCSC
L1
5
JMK105CBJ106MV-F
10u
LCSC
C1, C2, C3, C23, C24
1
FS18B105K160PBG
1u
LCSC
C4
1
C0402X7R103K500NTB
10n
LCSC
C5
1
GRM188R61C475KE11D
4.7u
LCSC
C6
3
CA45-B-10V-100UF-M
100u
LCSC
C7, C16, C17
Show 15 more
QtyPartRefs
1
CGA3E2C0G1H180JT0Y0N
18p
LCSC
C8
2
CL10A106MA8NRNC
10u
LCSC
C9, C11
5
EDK105BBJ475MVLF
4.7u
LCSC
C10, C12, C13, C14, C15
3
C0402X7R104K160NTB
100nF
LCSC
C18, C19, C20
2
GRM1555C1H220JA01D
22pF
LCSC
C21, C22
1
RC0603FR-0747KL
50k
LCSC
R1
1
RCT031K07FLF
1.07k
LCSC
R2
1
AECR0603F750RK9
750R
LCSC
R3
1
RC0402FR-7W10KL
10k
LCSC
R4
1
ERJPA3J103V
10k
LCSC
R5
1
0603WAF4023T5E
402k
LCSC
R6
1
RC0603FR-07100KL
100k
LCSC
R7
7
RC-02W1001FT
1K
LCSC
R8, R9, R13, R14, R15, R16, R17
2
0402WGF1500TCE
150R
LCSC
R10, R11
1
RC0402FR-074K7L
4.7K
LCSC
R12

Calve heater design files

The KiCad project lives in the R-Mutura/calve_heater repository on GitHub; these links point at the commit this page was built from.

Calve heater: common questions

What microcontroller does the Calve heater use?

The Calve heater is built around the ATMEGA328P-MU, from the AVR/Arduino family.

How big is the Calve heater PCB?

The Calve heater measures 43.8 × 25 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Calve heater?

56 components, from 35 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 Calve heater design files?

From the R-Mutura/calve_heater repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Calve heater design in my own project?

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

Can I test firmware for the Calve heater 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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