HardLabs

Awreflow3

kelogs·awreflow3

Awreflow3 PCB layout, top view — open source AVR/Arduino board by kelogs

About the Awreflow3 PCB

Awreflow3 is an open source AVR/Arduino PCB design by kelogs, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 49 components from 32 distinct parts.

Its main chip is the ATMEGA88-20AU, from the AVR/Arduino family. Other key parts include the L78L33ACZ, NOKIA5110, OPTO-TRANSISTOR, MOC3020M and MAX31855KASA. By type, the board carries 17 resistors, 10 capacitors, 7 ICs, 5 connectors, 2 transistors and 2 diodes.

From the project

Andy's Workshop reflow oven (awreflow2)

awreflow3 is a reflow oven for soldering PCBs based on Andy's Workshop awreflow2. Technically, this repository contains the missing electric diagram and a layout for the oven, with some modifications in order to suit the parts I had lying around. The purpose of this repository is that you can also pull the files and modify them according to your needs.

This project has been developed with KiCad

Awreflow3, from the project README
From the project README

Main components on the Awreflow3

L78L33ACZATMEGA88-20AUNOKIA5110OPTO-TRANSISTORMOC3020MMAX31855KASA

Awreflow3 bill of materials (BOM)

49 components, 32 distinct parts.

QtyPartRefs
1
L78L33ACZ
IC1
1
ATMEGA88-20AU
U1
1
NOKIA5110
U2
1
OPTO-TRANSISTOR
U3
1
MOC3020M
U4
1
MAX31855KASA
U5
1
HC-05-6pin-header
U6
1
C945
Q1
1
C1815
Q2
1
Crystal
Y1
1
CONN_5V
P1
1
CONN_OVEN
P9
1
CONN_MAINS
P10
1
CONN_ISP
P13
1
CONN_FAN
P14
1
Fuse
F1
2
Varistor
RV1, RV2
1
LINK
D1
1
TRIAC
D2
2
bead
L1, L2
Show 12 more
QtyPartRefs
1
330nF
C1
6
100nF
C2, C3, C4, C5, C6, C9
2
24pF
C7, C8
1
10nF
C10
1
2k1 (1mA)
R1
1
300 (10mA)
R2
4
10k
R3, R5, R10, R21
2
1k
R4, R6
2
300
R7, R8
2
47 (40mA)
R9, R11
1
360
R12
4
10k
R13, R14, R16, R17

Awreflow3 design files

The KiCad project lives in the kelogs/awreflow3 repository on GitHub; these links point at the commit this page was built from.

Awreflow3: common questions

What microcontroller does the Awreflow3 use?

The Awreflow3 is built around the ATMEGA88-20AU, from the AVR/Arduino family.

How big is the Awreflow3 PCB?

The Awreflow3 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Awreflow3?

49 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Awreflow3 design files?

From the kelogs/awreflow3 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Awreflow3 design in my own project?

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

Can I test firmware for the Awreflow3 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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