2 layers52.7 × 32.4 mm
4 layers98.5 × 193.5 mm
Schematics
apistol78/retrodack1RetroDäck, handheld game console
- Size
- 98.5 × 193.5 mm
- Copper layers
- 4
- Thickness
- 3.3 mm
- Parts
- 120
- Nets
- 285
- Pads
- 759
- Tracks, vias
- 2,986, 228
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 May 2025
- Updated
- 7 Apr 2026
Overview
Schematics is an open-source printed circuit board by apistol78, from the apistol78/retrodack repository on GitHub, published under the MPL-2.0 licence. It is a 4-layer board of 98.5 × 193.5 mm with 120 parts on 285 nets, routed with 2,986 tracks and 228 vias.
It is built around the W25Q32JVSSIQ, AMS1117-3.3 and AMS1117-1.8, with the BQ24072RGTR, BQ27441DRZT-G1A and DS3231MZ/V+ among its other parts. Its parts include 49 capacitors, 36 resistors, 14 ICs, 8 connectors and 2 diodes.
Main components
10
W25Q32JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 133MHz 1uA 2.7V~3.6V 20 Years 32Mbit 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsAMS1117-1.8
SOT-223-40℃~+125℃@(Tj) 0.003%Vout 1 1.3V@(1A) 1.8V 15V 1A 72dB@(120Hz) Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BQ24072RGTR
QFN-16-EP(3x3)-40℃~+125℃ 1 1.5A 1.5mA 4.2V 4.35V~6.6V Charging IC Lithium Battery Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
BQ27441DRZT-G1A
SON-12-EP(2.5x4)-40℃~+85℃ 1 2.45V~4.5V 600nA I2C Lithium Battery Monitoring IC Not supported SON-12-EP(2.5x4) Battery Management ROHSTexas InstrumentsBattery Management
DS3231MZ/V+
SOIC-8-40℃~+85℃ 2.3V~5.5V Built-in I2C Temperature compensation、Backup power management and battery charging、Alarm function、Locking and tamper-proof、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
PCA9555PW
TSSOP-24-40℃~+85℃ 1.1uA 16 2.3V~5.5V 3mA 400kHz 8 I2C、SMBus Interrupt Output Reset function、Cascade and address expansion TSSOP-24 I/O Expanders ROHSNXP SemiconductorsI/O Expanders
TPS22917DBV
SOT-23-6-40℃~+125℃ 0V~5.5V 1 2A 80mΩ Active High Load Switch Output discharge function、Soft-start、Reverse current blocking SOT-23-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
TPS63002DRC
UncategorisedTexas Instruments
SSSS811101
SMD-40℃~+85℃ 10,000 cycles 300mA 4.1mm 5V Rectangular Columnar SMD(SMT) Tab SPDT Surface Mount, Right Angle SMD Slide Switches ROHSALPSALPINESlide Switches
Parts
120| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R9, R10, R11, R12, R13, R14, R15, R16, R18, R19, R20, R28, R31, R35, R36 |
| 13 | 1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5, C6, C7, C8, C10, C11, C12, C13, C14, C48, C49 |
| 8 | 4k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R17, R21, R22, R23, R24, R25, R33, R34 |
| 8 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4, H5, H6, H7, H8 |
| 7 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15, C21, C23, C26, C32, C35, C36 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C22, C24, C33, C37 |
| 4 | 10uF | Capacitor_SMD:CP_Elec_5x5.3 | C1, C17, C27, C30 |
| 4 | 47uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C25, C40, C43, C45 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C16, C28, C29 |
| 2 | 1.2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C34, C38 |
| 2 | 22uF | Capacitor_SMD:CP_Elec_5x5.3 | C2, C31 |
| 2 | 27pF | Capacitor_SMD:C_0805_2012Metric | C19, C20 |
| 2 | 33 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | 47uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C46, C47 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6, R7 |
| 2 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1, U2 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D1, D3 |
| 1 | 0 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C18 |
| 1 | 0.47uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C44 |
| 1 | 1-1473005-4 | SODIMM:TE_1-1473005-4 | P1 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 10m (1%, 1W) | Resistor_SMD:R_0805_2012Metric | R30 |
| 1 | 10uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C42 |
| 1 | 120 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R26 |
| 1 | 12MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | 2.2uH | Inductor_SMD:L_APV_ANR4012 | L1 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C9 |
| 1 | 47uF | Capacitor_SMD:CP_Elec_5x5.3 | C39 |
| 1 | 500pF | Capacitor_SMD:C_0805_2012Metric | C41 |
| 1 | 527461671 | CON_527461671_MOL:CON_527461671_MOL | J5 |
| 1 | 68 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R27 |
| 1 | AMS1117-1.8 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | BATTERY_CONN | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J4 |
| 1 | BQ24072RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U7 |
| 1 | BQ27441DRZT-G1A | Package_SON:Texas_S-PDSO-N12 | U15 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J7 |
| 1 | DS3231MZ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U14 |
| 1 | LCD_CONN | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J2 |
| 1 | MAX3421EETJ_T | MAX2:QFP50P700X700X120-32N | U3 |
| 1 | NC | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R32 |
| 1 | PCA9555PW | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U10 |
| 1 | SD_Card_Receptacle | DM1AA-SF-PEJ(82):RetroDACK SD_Hirose_DM1AA_SF_PEJ82 | J1 |
| 1 | SPEAKER_CONN | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J6 |
| 1 | SSSS811101 | SSSS811101:SW_SSSS811101 | S1 |
| 1 | TPS22917DBV | Package_TO_SOT_SMD:SOT-23-6 | U9 |
| 1 | TPS63002 | Package_SON:Texas_DRC0010J_ThermalVias | U6 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
| 1 | W25Q32JVSS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U13 |
| 1 | ~ | MY_AUDIO:QFN50P500X500X100-33N | U8 |
| 1 | ~ | ap_phonejack:PJ-327E-5A | U11 |
| 1 | ~ | libraries:SOP80P1176X120-54N | U4 |
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Questions
How big is the Schematics PCB?
It measures 98.5 × 193.5 mm and has 4 copper layers, 3.3 mm thick.
What parts does the Schematics use?
120 parts, built around the W25Q32JVSSIQ, AMS1117-3.3, AMS1117-1.8 and BQ24072RGTR. 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 Schematics KiCad files?
From the apistol78/retrodack repository on GitHub, at the commit this page was made from: the board is schematics/mainboard/mainboard.kicad_pcb and its schematic schematics/audio_eval01/audio_eval01/audio_eval01.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Schematics design in my own project?
Its repository publishes it under the MPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).