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Afterglow

bitfieldlabs·afterglow·afterglow_pcb_v30/afterglow.kicad_pcb

Afterglow PCB layout, top view — open source RP2040/RP2350 board by bitfieldlabs
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About the Afterglow PCB

Afterglow is an open source RP2040/RP2350 PCB design by bitfieldlabs, published on GitHub. It is a 2-layer board measuring 128.7 × 81 mm, with 196 components from 45 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the PC817, NCP1117-3.3_SOT223, ULN2803A, 74LS165 and W25Q32JVSS. By type, the board carries 96 resistors, 21 capacitors, 18 ICs, 18 transistors, 18 diodes and 15 connectors.

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

From the project

Pinball retro afterglow

This is the newest generation of afterglow boards for the switched playfield lamps (not the GI), supporting WPC, Data East, System 11 and Stern Whitestar/S.A.M. games.

The new board is based on the RP2040 microprocessor. It is more robust than previous versions and it supports hats!

Components were chosen based on availability and price.

The connectors and some other parts are currently not included in the assembly files.

Afterglow, from the project README
From the project README

Main components on the Afterglow

PC817RP2040NCP1117-3.3_SOT223ULN2803A74LS165W25Q32JVSSINA181A1

Afterglow bill of materials (BOM)

196 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
10
PC817
U1, U2, U3, U4, U5, U6, U7, U8 +2
1
RP2040
U11
1
NCP1117-3.3_SOT223
U12
1
ULN2803A
U13
3
74LS165
U14, U16, U17
1
W25Q32JVSS
U15
1
INA181A1
U18
8
AO3401A
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8
10
AO3400A
Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16 +2
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
Y1
1
J133_IN_R
J1
1
J137_IN_C
J2
1
Conn_Power
J3
2
CONN_01X10_PIN
Conn_01x10_Pin
J4, J5
1
CONN_01X04_SOCKET
Conn_01x04_Socket
J6
2
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J7, J8
1
J133_OUT_R
J9
1
J137_OUT_C
J10
1
J134_OUT_R
J11
1
J138_OUT_C
J12
Show 25 more
QtyPartRefs
1
136_OUT_C
J13
1
J135_OUT_R
J14
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
P1
2
5A SB
F1, F2
1
CFG
SW1
1
SW_Push
SW2
3
TestPoint
TP1, TP2, TP3
2
LED
PWR_LED1, ST_LED1
10
RB080
D1, D2, D3, D4, D5, D6, D7, D8 +2
8
3.0V
D9, D10, D11, D12, D13, D14, D15, D16
13
100N
100n
C1, C2, C9, C11, C12, C13, C14, C15 +5
2
1u
C3, C10
2
22P
22p
C4, C5
1
470UF
470uF
C6
2
1UF
1uF
C7, C8
1
0.1
C18
10
1k
R1, R2, R3, R4, R5, R6, R7, R8 +2
30
1k
R11, R12, R13, R14, R15, R16, R17, R18 +22
2
5K1
5k1
R37, R38
2
27
R40, R41
11
10K
10k
R44, R63, R65, R67, R69, R71, R73, R75 +3
8
2k
R46, R48, R50, R52, R54, R56, R58, R60
22
10K
10k
R47, R49, R51, R53, R55, R57, R59, R61 +14
10
220
R62, R64, R66, R68, R70, R72, R74, R76 +2
1
200MOHM
200mOhm
R96

Afterglow design files

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

Afterglow: common questions

What microcontroller does the Afterglow use?

The Afterglow is built around the RP2040, from the RP2040/RP2350 family.

How big is the Afterglow PCB?

The Afterglow measures 128.7 × 81 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Afterglow?

196 components, from 45 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 Afterglow design files?

From the bitfieldlabs/afterglow 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 Afterglow design in my own project?

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

Can I test firmware for the Afterglow without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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