2 layers76.2 × 63.5 mm
2 layers127 × 76.2 mm
Ckt xing adv
IowaScaledEngineering/ckt-xingSimple Model Railroad Grade Crossing Controller
- Size
- 127 × 76.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 140
- Nets
- 106
- Pads
- 453
- Tracks, vias
- 1,196, 185
- Pours
- 27
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Oct 2019
- Updated
- 11 Oct 2026
Overview
Ckt xing adv is an open-source printed circuit board by IowaScaledEngineering, from the IowaScaledEngineering/ckt-xing repository on GitHub. It is a 2-layer board of 127 × 76.2 mm with 140 parts on 106 nets, routed with 1,196 tracks and 185 vias.
It is built around the ATTINY861A-SU, DRV8231ADSG and AP63205WU, with the PAM8301AAF, PCA9685PW and W25Q128JVSIQ among its other parts. Its parts include 35 resistors, 29 capacitors, 26 diodes, 18 connectors and 9 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATTINY861A-SU
SOIC-20-300mil-40℃~+85℃ 1.8V~5.5V 10bit 16 20MHz 512Byte 512Byte 8 Bit 8KB AVR Built-in FLASH SOIC-20-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontroller Units (MCUs/MPUs/SOCs)
DRV8231ADSG
WSON-8(2x2)-40℃~+150℃ 1 1uA 3.7A 4.5V~33V 600mΩ Yes WSON-8(2x2) Brushed DC Motor Drivers ROHSTexas InstrumentsBrushed DC Motor Drivers
AP63205WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.8V~32V 5V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC ConvertersPAM8301AAF
SOT-23-6-40℃~+85℃ 1-Channel 1.5Wx1@8Ω 2.5V~5.5V 4mA 50dB 78dB 88% Class D Enable/shutdown function、Filterless architecture SOT-23-6 Audio Amplifiers ROHSDiodes IncorporatedAudio Amplifiers
PCA9685PW
TSSOP-28-40℃~+85℃ 100kHz~1MHz 16 2.3V~5.5V 25mA 5.5V Built-in PWM TSSOP-28 LED Drivers ROHSNXP SemiconductorsLED Drivers
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AP7381-33Y
SOT-89-40℃~+125℃@(Tj) 1 150mA 1V@(100mA) 2.5uA 3.3V 40V 60dB Fixed Positive Short Circuit Protection、Thermal Shutdown SOT-89 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PCA9555D
SO-24-300milReset function、Cascading and address extension SO-24-300mil I/O Expanders ROHSNXP SemiconductorsI/O Expanders
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
FSM4JSMATR
SMD-4P,6x6mm-40℃~+85℃ 1.6N 100,000 cycles 24V 50mA 5mm 6mm 6mm Gull Wing Round Button SPST-NO Surface Mount,Vertical Without Bracket SMD-4P,6x6mm Tactile Switches ROHSTE ConnectivityTactile Switches
ZXMS6004FF
SOT-23F-40℃~+125℃ 1 1.3A 350mΩ 60V Active High Low Side Switch SOT-23F Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
BSS138
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
Parts
140| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R2, R10, R11, R12, R13, R14, R15, R17, R20, R21, R23, R24, R25, R28, R29 +10 |
| 13 | 1uF | Capacitor_SMD:C_0805_2012Metric | C7, C8, C9, C14, C16, C17, C18, C19, C20, C21, C23, C27, C28 |
| 13 | YELLOW | LED_SMD:LED_0805_2012Metric | D9, D10, D11, D12, D13, D14, D16, D17, D18, D19, D20, D21, D22 |
| 10 | SM04B-SRSS | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4, J5, J6, J7, J8, J9, J10, J11, J12, J16 |
| 9 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 |
| 8 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C6, C10, C11, C12, C13, C15, C22, C25 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric | R8, R16, R18, R19, R22, R34, R35 |
| 5 | Screw_Terminal_01x02 | TerminalBlock_RND:TerminalBlock_RND_205-00012_1x02_P5.00mm_Horizontal | J1, J2, J3, J17, J18 |
| 4 | CDBM140G | ISE_Generic:SOD-123T | D1, D2, D5, D6 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3 |
| 3 | BLUE | LED_SMD:LED_0805_2012Metric | D15, D25, D26 |
| 3 | FSM4JSMATR | ISE_Generic:TE_FSM4JSMA | SW1, SW2, SW3 |
| 3 | ZXMS6004FF | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C4, C24 |
| 2 | AMBER | LED_SMD:LED_0805_2012Metric | D23, D24 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q4, Q5 |
| 2 | Conn_02x03_Row_Letter_First | ISE_UltraLibrarian:MOLEX_15910060 | J13, J14 |
| 2 | DRV8231A | Package_SO:Texas_HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.95x4.9mm_Mask2.4x3.1mm_ThermalVias | U8, U9 |
| 2 | GREEN | LED_SMD:LED_0805_2012Metric | D3, D4 |
| 2 | RED LED | LED_SMD:LED_0805_2012Metric | D7, D8 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R26 |
| 1 | 10k | ISE_UltraLibrarian:POT_3361P_BRN | R27 |
| 1 | 220uF 6.3V | Capacitor_SMD:CP_Elec_6.3x5.8 | C29 |
| 1 | 4.7uH | ISE_UltraLibrarian:MSS6132-xxxMLC | L1 |
| 1 | 470pF | Capacitor_SMD:C_0805_2012Metric | C26 |
| 1 | 68uF | Capacitor_SMD:CP_Elec_6.3x5.8 | C5 |
| 1 | AP63205WU | Package_TO_SOT_SMD:TSOT-23-6 | U2 |
| 1 | AP7381-33Y | ISE_Generic:SOT-89-3 | U1 |
| 1 | ATtiny861A-S | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U4 |
| 1 | Conn_02x05_Counter_Clockwise | Connector:Tag-Connect_TC2050-IDC-FP_2x05_P1.27mm_Vertical | J15 |
| 1 | LOGO | ISE_Generic:IMG_RRXING | G*** |
| 1 | PAM8301 | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | PCA9555D | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U6 |
| 1 | PCA9685PW | Package_SO:TSSOP-28_4.4x9.7mm_P0.65mm | U5 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x6.2mm_P1.27mm | U3 |
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Questions
How big is the Ckt xing adv PCB?
It measures 127 × 76.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ckt xing adv use?
140 parts, built around the ATTINY861A-SU, DRV8231ADSG, AP63205WU and PAM8301AAF. 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 Ckt xing adv KiCad files?
From the IowaScaledEngineering/ckt-xing repository on GitHub, at the commit this page was made from: the board is kicad/ckt-xing-adv/ckt-xing-adv.kicad_pcb and its schematic kicad/ckt-xing-adv/ckt-xing-adv.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ckt xing adv design in my own project?
Its repository states no licence, so its author keeps all rights: ask IowaScaledEngineering before reusing the design.