HardLabs

AVRThermostat

protaskin·AVRThermostat·Design/Thermostat.kicad_pcb

AVRThermostat PCB layout, top view — open source AVR/Arduino board by protaskin

About the AVRThermostat PCB

AVRThermostat is an open source AVR/Arduino PCB design by protaskin, published on GitHub under the MIT license. It is a 2-layer board measuring 54.6 × 71.8 mm, with 31 components from 16 distinct parts.

Its main chip is the ATMEGA8-16PU, from the AVR/Arduino family. Other key parts include the DS18B20. By type, the board carries 8 connectors, 7 resistors, 4 switches, 4 capacitors, 3 diodes and 2 ICs.

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

From the project

A programmable thermostat on ATmega8A and DS18B20.

AVRThermostat is, as the name implies, a programmable thermostat, which is built on

* digital thermometer DS18B20 by Maxim Integrated,

* four-digit seven-segment led display with common cathode (like CC56-12 or FYQ-5641A),

and uses a relay to control a heater or fan. The device can be used as a simple thermometer as well. The sensor measures temperatures from -55°C to +125°C with ±0.5°C accuracy from -10°C to +85°C.

AVRThermostat, from the project README
From the project README

Main components on the AVRThermostat

ATMEGA8-16PUDS18B20

AVRThermostat bill of materials (BOM)

31 components, 16 distinct parts.

QtyPartRefs
1
ATMEGA8-16PU
U1
1
DS18B20
U2
1
BC547
Q1
1
BARREL_JACK
J1
6
CONN_01X01_MALE
J2, J3, J4, J5, J6, J7
1
Screw_Terminal_1x03
J8
1
CC56-12
AFF1
1
TIANBO-HJR-4102-L
RL1
4
SW_Push
SW1, SW2, SW3, SW4
1
1N4148
D1
2
LED
D2, D3
1
47uF
C1
3
100nF
C2, C3, C4
3
330
R1, R5, R7
3
4.7k
R2, R3, R4
1
680
R6

AVRThermostat design files

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

AVRThermostat: common questions

What microcontroller does the AVRThermostat use?

The AVRThermostat is built around the ATMEGA8-16PU, from the AVR/Arduino family.

How big is the AVRThermostat PCB?

The AVRThermostat measures 54.6 × 71.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the AVRThermostat?

31 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the AVRThermostat design files?

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

Can I use the AVRThermostat design in my own project?

Yes, under the terms of its MIT license, which protaskin chose for the repository.

Can I test firmware for the AVRThermostat 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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