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Inefficient coil gun

jamesbrayy·inefficient-coil-gun·kicadFiles/electromagneticMarbleMachine.kicad_pcb

Inefficient coil gun PCB layout, top view — open source AVR/Arduino board by jamesbrayy
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About the Inefficient coil gun PCB

Inefficient coil gun is an open source AVR/Arduino PCB design by jamesbrayy, published on GitHub under the MIT license. It is a 2-layer board measuring 440 × 196 mm, with 151 components from 53 distinct parts.

Its main chip is the ATMEGA328P-PU, from the AVR/Arduino family. Other key parts include the LM2576T-5, NE555P, 4N28 and UGN3503UA. By type, the board carries 44 diodes, 36 resistors, 15 capacitors, 14 connectors, 12 transistors and 10 ICs.

From the project

a somewhat successful first coil gun project

a marble machine with a five-stage coil gun to accelerate the marbles.

optimised for ~300V charges (225 J) but capable of up to 405V to give a 10% safety margin (410.0625 J).

Inefficient coil gun, from the project README
From the project README

Main components on the Inefficient coil gun

LM2576T-5NE555P4N28ATMEGA328P-PUUGN3503UA

Inefficient coil gun bill of materials (BOM)

151 components, 53 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
LM2576T-5
U1, U9
1
NE555P
U2
5
4N28
U3, U5, U6, U7, U8
1
ATMEGA328P-PU
ATmega328P-PU
U4
1
UGN3503UA
U10
6
2N2222
Q1, Q2, Q5, Q6, Q7, Q11
5
PT334-6B
Q3, Q4, Q8, Q9, Q10
1
BC639
Q12
1
20MHZ
20MHz
Y1
1
SSD1306
J1
7
~
J2, J8, J9, J10, J11, J12, J15
2
Shunt
J3, J5
1
CONN_01X03_MOUNTINGPIN
Conn_01x03_MountingPin
J4
2
CONN_01X14_MOUNTINGPIN
Conn_01x14_MountingPin
J6, J7
1
CONN_01X03_MOUNTINGPIN
Conn_01x03_MountingPin
J16
1
buzzer
BZ1
1
5V relay
K1
1
1MΩ Pot
RV1
1
10kΩ Pot
RV2
1
Pushbutton
SW1
Show 33 more
QtyPartRefs
1
SPDT Microswitch
SW2
1
N/C Pushbutton
SW3
1
SPST Switch
SW4
1
20V Vin
V1
1
405V Boost Converter
V2
1
9V Battery
V3
2
1N5822
D1, D43
17
6A10
D2, D11, D12, D13, D14, D16, D17, D29 +9
1
151033RS03000
White LED
Wurth Electronics Inc.
D3
7
1N5408
D4, D9, D10, D25, D26, D27, D28
5
151033RS03000
IR LED
Wurth Electronics Inc.
D5, D6, D19, D20, D21
6
151033RS03000
5mm LED
Wurth Electronics Inc.
D7, D8, D22, D23, D24, D42
6
VS-70TPS12PBF
CLA50E1200HB
D15, D18, D34, D37, D40, D41
2
100UH
100uH
L1, L7
5
100UH
100uH
L2, L3, L4, L5, L6
1
Solenoid
L8
2
0.01UF
0.01uF
C1, C2
2
100UF
100uF
C3, C14
2
470UF
470uF
C4, C15
2
22PF
22pF
C5, C6
2
0.1UF
0.1uF
C7, C8
5
1000UF
1000uF
C9, C10, C11, C12, C13
8
10kΩ
R1, R2, R12, R13, R17, R28, R29, R30
1
910kΩ
R3
7
2k2Ω
R4, R14, R15, R31, R32, R33, R36
1
2k0Ω
R5
6
390Ω
R6, R7, R11, R20, R21, R22
5
1k2Ω
R8, R9, R23, R24, R25
4
270Ω
R10, R16, R18, R19
1
900Ω
R26
1
47Ω
R27
1
10k0Ω
R34
1
200W 1k0Ω
R35

Inefficient coil gun design files

The KiCad project lives in the jamesbrayy/inefficient-coil-gun repository on GitHub; these links point at the commit this page was built from.

Inefficient coil gun: common questions

What microcontroller does the Inefficient coil gun use?

The Inefficient coil gun is built around the ATMEGA328P-PU, from the AVR/Arduino family.

How big is the Inefficient coil gun PCB?

The Inefficient coil gun measures 440 × 196 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Inefficient coil gun?

151 components, from 53 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Inefficient coil gun design files?

From the jamesbrayy/inefficient-coil-gun repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Inefficient coil gun design in my own project?

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

Can I test firmware for the Inefficient coil gun 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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