2 layers40 × 40 mm
HeikouBoxCore
kasamikona/HeikouBox
A project towards running "Parallelogram" demo by lft (Linus Åkesson).
28 parts2
2 layers100 × 100 mm
HeikouBox
kasamikona/HeikouBox2A project towards running "Parallelogram" demo by lft (Linus Åkesson).
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 193
- Nets
- 185
- Pads
- 687
- Tracks, vias
- 1,457, 164
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Aug 2020
- Updated
- 31 Dec 2025
Overview
HeikouBox is an open-source printed circuit board by kasamikona, from the kasamikona/HeikouBox repository on GitHub. It is a 2-layer board of 100 × 100 mm with 193 parts on 185 nets, routed with 1,457 tracks and 164 vias.
It is built around the 74HCU04D, LD1117S12TR-HXY and LD1117S33TR(MS), with the MMBT3904, WS2812B and BSS138 among its other parts. Its parts include 114 resistors, 29 capacitors, 9 transistors, 7 ICs and 7 diodes. It belongs with the STM32 boards of this library.
Main components
6
74HCU04D
SO-14-40℃~+125℃ 1.7V~4.8V 1.8V、4V、5.5V 12ns@6V,50pF 200mV、260mV、500mV 2V~6V 2uA 300mV~1.2V 5.2mA 5.2mA 6 74HCU Push-pull StandardCMOS SO-14 Inverters ROHSNexperiaInverters
LD1117S12TR-HXY
SOT-223-20℃~+85℃ 1.2V 1.3V@(800mA) 15V 2mA 800mA Fixed Over Temperature Protection SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHXY MOSFETVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsLD1117S33TR(MS)
SOT-223-20℃~+125℃@(Ta) 1 1.4V@(1A) 12V 1A 2mA 3.3V Fixed Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorisedBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
README.mdHeikouBox
A messy project towards running "Parallelogram" demo by lft (Linus Åkesson).
It includes the following:
- Open FPGA demo board designed from the ground up, as the original hardware is no longer available. The quality is low and may require some hardware hacking skills, but mostly aimed at being plug-and-play. Requires a Cyclone III FPGA chip, specifically EP3C25E144C8N. These are generally rare/expensive.
- Firmware, scripts and an FPGA configuration working towards dumping the Parallelogram demo binary.
- (Future plans) Software emulation to eliminate the need for practically unobtainable hardware, rip the music in high quality, and facilitate possible demo modifications.
I just want to run the demo!
First you need to build the hardware.
- Obtain the parts (good luck) and get boards made (designed to JLCPCB's requirements).
- At this stage the OLED & buttons are unused by the current firmware.
- The neopixels & PS/2 port are also unused and may be removed later, they're semi scrapped features.
Load the basic firmware (SingleBoot arduino sketch) on the Blue Pill. I recommend getting a kit with a ST-Link adapter which makes this very easy.
Download the extender.rbf file from lft's blog page, put it on a FAT32-formatted microSD card and insert it.
Make sure you have a good stable 5V DC power source, things may freak out if the power is weak. Recommended to use a 5V 1A/2A wall wart. Center positive because we're somewhat sane here.
Hook up the VGA and audio connections, power it on and wait a few seconds. If you did everything right, the demo should run. Please enjoy.
Terminology
I use the following terminology for this quite weird architecture:
- Core = the FPGA, or the daughter board holding it
- Hub = the STM32 Blue Pill microcontroller which loads a configuration into the core etc.
- Firmware = the program on the hub, currently an arduino sketch
- Configuration = a design project for the FPGA, or hardware-loadable files generated from it
License
I haven't applied a proper license to the project yet, so the following applies:
- The Parallelogram demo and any material from it belongs to Linus Åkesson.
- Any other work here was created by me (kasamikona).
- Please don't take and claim it as your own or do anything else bad with it.
- Feel free to play around and modify it, but I won't accept pull requests.
Acknowledgement
Thank you to Linus Åkesson for making such an interesting demo and inspiring this project.
Parts
193| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | 2K2 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R313, R314, R317, R318, R323, R324, R325, R326, R327, R328, R329, R330, R331, R332, R333, R334 +40 |
| 26 | 1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R203, R204, R304, R305, R306, R307, R308, R309, R310, R311, R312, R315, R316, R321, R322, R501 +10 |
| 19 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R101, R205, R206, R207, R208, R209, R210, R319, R320, R509, R512, R514, R516, R518, R522, R525 +3 |
| 13 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C102, C103, C107, C201, C401, C402, C403, C404, C405, C501, C502, C503, C504 |
| 7 | 75R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R301, R302, R303, R371, R372, R524, R529 |
| 7 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q301, Q302, Q303, Q304, Q305, Q306, Q307 |
| 6 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C301, C302, C305, C306, C307, C308 |
| 4 | 22p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C202, C203, C204, C205 |
| 4 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C101, C104, C105, C106 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | MH1, MH2, MH3, MH4 |
| 4 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D501, D502, D503, D504 |
| 3 | 1K | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV301, RV302, RV303 |
| 3 | 1R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R102, R103, R104 |
| 2 | 10n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C303, C304 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R201, R202 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q502, Q503 |
| 2 | HS | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP301, JP302 |
| 1 | 14.31818MHz | Crystal:Crystal_HC49-4H_Vertical | Y201 |
| 1 | 1K5 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R520 |
| 1 | 28.37516MHz | Crystal:Crystal_HC49-4H_Vertical | Y202 |
| 1 | 5.6V | Diode_SMD:D_SOD-123 | D103 |
| 1 | 5V | KSK_HeikouBox:BarrelJack_Multi | J101 |
| 1 | 74HCU04 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U202 |
| 1 | AudioJack3_SwitchTR | KSK_HeikouBox:Jack_3.5mm_PJ307_Horizontal | J302 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J201 |
| 1 | Conn_02x08_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J202 |
| 1 | DB15_Female_HighDensity_MountingHoles | Connector_Dsub:DSUB-15-HD_Female_Horizontal_P2.29x1.98mm_EdgePinOffset3.03mm_Housed_MountingHolesOffset4.94mm | J301 |
| 1 | DGND | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP503 |
| 1 | DVCC | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP502 |
| 1 | Down | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW504 |
| 1 | HeikouBox-Core | KSK_HeikouBox:HeikouBox-Core-Base | U201 |
| 1 | K4S281632-UC60 | Package_SO:TSOP-II-54_22.2x10.16mm_P0.8mm | U401 |
| 1 | LD1117S12TR | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U103 |
| 1 | LD1117S25TR | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U102 |
| 1 | LD1117S33TR | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U101 |
| 1 | Left | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW501 |
| 1 | M7 | Diode_SMD:D_SMA | D102 |
| 1 | Micro_SD_Card_TFP09-2-12B | KSK_HeikouBox:Micro_SD_Card_TFP09-2-12B | J501 |
| 1 | OLED-4P-I2C | KSK_HeikouBox:OLED-4P-Generic-128x64-0.96in | DS501 |
| 1 | PS/2 | KSK_HeikouBox:TE_Mini-DIN-6_Horizontal | J503 |
| 1 | Poly 200mA | Fuse:Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F102 |
| 1 | Poly 2A | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F101 |
| 1 | Power | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D101 |
| 1 | Right | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW502 |
| 1 | STM32-BluePill-Socket | KSK_HeikouBox:STM32-BluePill-Socket | U501 |
| 1 | Up | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW503 |
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Questions
How big is the HeikouBox PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HeikouBox use?
193 parts, built around the 74HCU04D, LD1117S12TR-HXY, LD1117S33TR(MS) and MMBT3904. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the HeikouBox KiCad files?
From the kasamikona/HeikouBox repository on GitHub, at the commit this page was made from: the board is hardware/HeikouBox/HeikouBox.kicad_pcb and its schematic hardware/HeikouBox/HeikouBox.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HeikouBox design in my own project?
Its repository states no licence, so its author keeps all rights: ask kasamikona before reusing the design.