HardLabs

QuadCalc

Dovgalyuk·QuadCalc·pcb-avr/pcb.kicad_pcb

QuadCalc PCB layout, top view — open source AVR/Arduino board by Dovgalyuk

About the QuadCalc PCB

QuadCalc is an open source AVR/Arduino PCB design by Dovgalyuk, published on GitHub. It is a 2-layer board measuring 238.8 × 125.7 mm, with 80 components from 65 distinct parts.

Its main chip is the ATMEGA2560-16AU, from the AVR/Arduino family. By type, the board carries 65 switches, 6 capacitors, 4 resistors, 2 connectors, 1 IC and 1 crystal.

From the project

Arduino-based calculator displaying bin/oct/dec/hex representations of argument and result simultaneously

Schematic: https://github.com/Dovgalyuk/QuadCalc/blob/master/pcb-avr/pcb.pdf

sudo avrdude -p m2560 -c usbtiny -U lfuse:r:low:r

Write low fuse bits from file low. It should contain single FF byte:

sudo avrdude -p m2560 -c usbtiny -U lfuse:w:low:r

Write high fuse bits from file high. It should contain single D8 byte:

sudo avrdude -p m2560 -c usbtiny -U hfuse:w:high:r

Main components on the QuadCalc

ATMEGA2560-16AU

QuadCalc bill of materials (BOM)

80 components, 65 distinct parts.

QtyPartRefs
1
ATMEGA2560-16AU
U1
1
12MHz
Y1
1
Conn_01x20_MountingPin
J1
1
ISP
J2
1
4.5V
BT1
1
B0
SW00
1
Power
SW1
1
B1
SW01
1
D8
SW02
1
D9
SW03
1
Dd
SW04
2
HD
SW05, SW45
1
Bd
SW06
1
Od
SW07
1
O0
SW10
1
O1
SW11
1
O2
SW12
1
O3
SW13
1
O4
SW14
1
O5
SW15
Show 45 more
QtyPartRefs
1
O6
SW16
1
O7
SW17
1
D0
SW20
1
D1
SW21
1
D2
SW22
1
D3
SW23
1
D4
SW24
1
D5
SW25
1
D6
SW26
1
D7
SW27
1
H0
SW30
1
H1
SW31
1
H2
SW32
1
H3
SW33
1
H4
SW34
1
H5
SW35
1
H6
SW36
1
H7
SW37
1
H8
SW40
1
H9
SW41
1
HA
SW42
1
HB
SW43
1
HC
SW44
1
HE
SW46
1
HF
SW47
1
ADD
SW50
1
SUB
SW51
1
MUL
SW52
1
DIV
SW53
1
AND
SW54
1
OR
SW55
1
XOR
SW56
1
=
SW57
1
NOT
SW60
1
NEG
SW61
1
LSH
SW62
1
RSH
SW63
12
x
SW64, SW65, SW66, SW67, SW70, SW71, SW72, SW73 +4
3
22p
C1, C2, C3
2
100p
C4, C5
1
100u
C6
1
10k
R1
1
2k
R2
1
6k3
R3
1
12
R4

QuadCalc design files

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

QuadCalc: common questions

What microcontroller does the QuadCalc use?

The QuadCalc is built around the ATMEGA2560-16AU, from the AVR/Arduino family.

How big is the QuadCalc PCB?

The QuadCalc measures 238.8 × 125.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the QuadCalc?

80 components, from 65 distinct parts. The full bill of materials is listed on this page.

Where can I download the QuadCalc design files?

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

Can I use the QuadCalc design in my own project?

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

Can I test firmware for the QuadCalc 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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