HardLabs

PhotonSaw

openspaceaarhus·PhotonSaw·laserctrl/laserctrl.net

This repository ships a schematic but no board layout.
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About the PhotonSaw PCB

PhotonSaw is an open source AVR/Arduino PCB design by openspaceaarhus, published on GitHub under the Apache-2.0 license. It is a board, with 244 components from 70 distinct parts.

Its main chip is the ATMEGA328P-A, from the AVR/Arduino family. Other key parts include the DRV8811, LPC1769FBD100, EL 816S(TA), 1G08 and MC34063. By type, the board carries 79 capacitors, 74 resistors, 28 connectors, 28 diodes, 11 ICs and 7 transistors.

It belongs with the sensors designs in this gallery.

From the project

A saw that uses photons to cut sheets of acrylic and wood

Too small/few power vias (on the +24V/GND main power rails) Wrong foot print for Q3 (BC807 for USB pull up): Swapped pin 1 and 2 The PWM and Fire optocouplers are too slow replace them with one VO 2630-X007T which can do 10 MHz. Add diode to the main fire signal that goes to the WD to make it impossible for the WD to fire the laser on its own. Switch the small mini-melf diodes to SOT-23, even where only one diode is needed (easier to mount). BC817 is too slow, replace with NX3008NBK A 3-pin serial connector for the chiller. A 6p header connector to bring +24 V on-board and connect to the…

Main components on the PhotonSaw

DRV8811ATMEGA328P-ALPC1769FBD100EL 816S(TA)1G08MC34063MC78L05ABDG

PhotonSaw bill of materials (BOM)

244 components, 70 distinct parts.

QtyPartRefs
4
DRV8811
IC1, IC2, IC4, IC5
1
ATMEGA328P-A
IC3
1
LPC1769FBD100
U1
2
EL 816S(TA)
U2, U3
1
1G08
U5
1
MC34063
U7
1
MC78L05ABDG
U8
2
nx3008pbk
Q1, Q6
3
nx3008nbk
Q2, Q3, Q7
2
BC807
Q4, Q5
1
12MHz
X1
1
32768Hz
X2
1
WD-ISP
CON1
1
USB
J1
1
MICROSD
J2
1
2mm-hole
P1
1
auxio
P2
1
Power
P3
1
LASER
P4
1
ftdi serial
P5
Show 50 more
QtyPartRefs
1
t-int
P6
1
t-in
P7
1
t-out
P8
1
airflow
P9
1
estop
P10
4
stepper
P12, P15, P18, P21
4
min
P13, P16, P19, P22
4
max
P14, P17, P20, P23
1
battery
P24
1
JTAG
P25
1
waterflow
P26
4
CONN_1
3v3, 24V1, GND1, GND2
5
MOUNTING
H1, H2, H3, H4, H5
1
Chiller
K1
1
Program
SW1
1
Reset
SW2
19
BAT 54S
D1, D3, D4, D5, D6, D7, D8, D9 +11
8
LED
D2, D10, D12, D13, D15, D16, D19, D30
1
SK 34
D43
2
FILTER
FB1, FB2
1
330uH
L1
34
100nF
C1, C9, C10, C11, C12, C13, C17, C19 +26
4
18pF
C2, C3, C6, C7
2
12pF
C4, C5
9
10nF
C8, C14, C25, C26, C28, C39, C40, C59 +1
12
220nF
C15, C16, C22, C29, C30, C36, C49, C50 +4
5
10uF/35V
C18, C32, C52, C66, C84
8
1nF
C23, C24, C37, C38, C57, C58, C71, C72
1
1mF/10V
C75
2
4.7uF/6.3V
C76, C87
1
82pF
C83
1
1.5mF/35V
C85
23
10k
R1, R15, R17, R18, R19, R26, R31, R37 +15
5
330R
R2, R3, R5, R34, R87
5
150R
R4, R25, R28, R29, R35
1
47k
R6
1
1k5
R12
2
33R
R13, R14
1
68R
R20
1
22k
R21
1
100k
R22
1
15k
R23
2
200R
R24, R27
2
470R
R32, R33
8
33k
R46, R47, R57, R58, R69, R70, R80, R81
9
0R22
R48, R49, R59, R60, R71, R72, R82, R83 +1
9
1k
R51, R52, R62, R63, R74, R75, R85, R86 +1
1
18k
R89
1
11k
R90
1
82k
R91

PhotonSaw design files

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

PhotonSaw: common questions

What microcontroller does the PhotonSaw use?

The PhotonSaw is built around the ATMEGA328P-A, from the AVR/Arduino family.

How many components are on the PhotonSaw?

244 components, from 70 distinct parts. The full bill of materials is listed on this page.

Where can I download the PhotonSaw design files?

From the openspaceaarhus/PhotonSaw repository on GitHub, which has a netlist; the links under Design files point to each one.

Can I use the PhotonSaw design in my own project?

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

Can I test firmware for the PhotonSaw 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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