HardLabs

Ultimate temperature controller

Technariumas·ultimate-temperature-controller

Ultimate temperature controller PCB layout, top view — open source AVR/Arduino board by Technariumas

About the Ultimate temperature controller PCB

Ultimate temperature controller is an open source AVR/Arduino PCB design by Technariumas, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 80 × 100 mm, with 68 components from 36 distinct parts.

Its main chip is the ATMEGA328P-A, from the AVR/Arduino family. Other key parts include the 7805, LD1117S12CTR, 4050, MAX31855KASA and SP3485CN. By type, the board carries 22 capacitors, 16 resistors, 11 connectors, 6 ICs, 4 transistors and 4 diodes.

It belongs with the sensors and displays & leds designs in this gallery.

From the project

Thermocouple based kiln/oven temperature controller accessable via RS485 or LCD/keypad. Supports temperature profiles on a SD card.

Features: Arduino compatible Thermocouple input via MAX31855 Output to LCD via I2C interface Relay output Open collector output RS485 interface 4 key keypad interface SD card

The device can act as a standalone controller or as a slave / master on RS485 network.

Standalone controller is equiped with a LCD screen, a keypad and a SD card. Files containing temperature profiles can be stored on the SD card. A profile can be selected using the menu system via keypad and LCD interface. PID controller runs on the microcontroller and ensures the precise temperature control.

Ultimate temperature controller, from the project README
From the project README

Main components on the Ultimate temperature controller

ATMEGA328P-A7805LD1117S12CTR4050MAX31855KASASP3485CN

Ultimate temperature controller bill of materials (BOM)

68 components, 36 distinct parts.

QtyPartRefs
1
ATMEGA328P-A
IC1
1
7805
U1
1
LD1117S12CTR
U2
1
4050
U3
1
MAX31855KASA
U4
1
SP3485CN
U5
3
MOS_N
Q1, Q3, Q4
1
MOS_N
Q2
1
CRYSTAL
X1
1
SD_Card
CON1
1
ISP
P1
1
BUTTONS
P2
1
OPEN_DRAIN
P3
1
POWER
P4
1
I2C1
P5
1
I2C2
P6
1
CONN_01X05
P7
1
THERMOCOUPLE
P8
1
RELAY
P9
1
RS485
P10
Show 16 more
QtyPartRefs
1
TERM
JP1
1
VAL**
Pin_Header_Straight_1x02
1
VAL**
Pin_Header_Straight_1x03
1
RELAY_40.61
RLY1
1
DIODE
D1
3
TVS-DUAL
D2, D3, D4
1
100u/50V
C1
4
1uF
C2, C4, C5, C6
8
C
C3, C7, C10, C12, C19, C20, C21, C22
2
10u/10V
C8, C9
4
1u
C11, C16, C17, C18
2
20p
C13, C14
1
100n
C15
5
R
R1, R2, R5, R7, R12
9
10k
R3, R4, R6, R8, R9, R10, R11, R15 +1
2
1k
R13, R14

Ultimate temperature controller design files

The KiCad project lives in the Technariumas/ultimate-temperature-controller repository on GitHub; these links point at the commit this page was built from.

Ultimate temperature controller: common questions

What microcontroller does the Ultimate temperature controller use?

The Ultimate temperature controller is built around the ATMEGA328P-A, from the AVR/Arduino family.

How big is the Ultimate temperature controller PCB?

The Ultimate temperature controller measures 80 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ultimate temperature controller?

68 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ultimate temperature controller design files?

From the Technariumas/ultimate-temperature-controller repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ultimate temperature controller design in my own project?

Yes, under the terms of its Apache-2.0 license, which Technariumas chose for the repository.

Can I test firmware for the Ultimate temperature controller 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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