2 layers114.3 × 82.6 mm
2 layers95.2 × 57.2 mm
Ckt iiab
IowaScaledEngineering/ckt-iiabSimple Interlocking-In-A-Box
- Size
- 95.2 × 57.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 46
- Pads
- 192
- Tracks, vias
- 381, 140
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Mar 2024
- Updated
- 8 Sep 2025
Overview
Ckt iiab is an open-source printed circuit board by IowaScaledEngineering, from the IowaScaledEngineering/ckt-iiab repository on GitHub. It is a 2-layer board of 95.2 × 57.2 mm with 67 parts on 46 nets, routed with 381 tracks and 140 vias.
It is built around the ATTINY861A-SU, AP7381-50Y and SM04B-SRSS-TB, with the JS202011SCQN and WS2812B among its other parts. Its parts include 18 resistors, 11 connectors, 8 capacitors, 6 diodes and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
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)
AP7381-50Y
SOT-89-40℃~+125℃@(Tj) 1 150mA 1V@(100mA) 2.5uA 40V 5V 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
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
JS202011SCQN
SMD-40℃~+85℃ 300mA 5,000 cycles 5.5mm 6V DPDT Rectangular Columnar SMD(SMT) Tab Surface Mount,Vertical SMD Slide Switches ROHSC&KSlide Switches
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12 |
| 10 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R3, R4, R5, R6, R9, R11, R12, R15, R18 |
| 4 | 150 | Resistor_SMD:R_0805_2012Metric | R16, R17, R19, R20 |
| 4 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R7, R8, R10 |
| 4 | 1uF | Capacitor_SMD:C_0805_2012Metric | C5, C6, C7, C8 |
| 4 | CDBM140G | ISE_Generic:SOD-123T | D1, D2, D3, D5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 4 | Screw_Terminal_01x02 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type059_RT06303HBWC_1x03_P3.50mm_Horizontal | J5, J6, J8, J10 |
| 4 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4 |
| 3 | SM04B-SRSS | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2, J3, J4 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | Molex 0532610471 | Connector_Molex:Molex_PicoBlade_53261-0471_1x04-1MP_P1.25mm_Horizontal | J9, J11 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 68uF | Capacitor_SMD:CP_Elec_6.3x5.8 | C1 |
| 1 | AP7381-50Y | ISE_Generic:SOT-89-3 | U1 |
| 1 | ATtiny861A-S | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U2 |
| 1 | AVR-ISP | Connector:Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J7 |
| 1 | GREEN LED | LED_SMD:LED_0805_2012Metric | D4 |
| 1 | JS202011SCQN | ISE_UltraLibrarian:SW_JS202011SCQN | SW2 |
| 1 | SW_DIP_x08 | Button_Switch_SMD:SW_DIP_SPSTx08_Slide_6.7x21.88mm_W8.61mm_P2.54mm_LowProfile | SW1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_RND:TerminalBlock_RND_205-00012_1x02_P5.00mm_Horizontal | J1 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D6 |
More from IowaScaledEngineering/ckt-iiab
1Similar boards
- 2 layers82.6 × 76.2 mm
Mss cascade basic
IowaScaledEngineering/mss-cascade
Integrated Cascade Module for Free-mo Modular Signal System
111 parts - 2 layers127 × 76.2 mm
- 2 layers139.7 × 88.9 mm
- 2 layers127 × 76.2 mm
- 2 layers133.4 × 127 mm
Mss xcade
IowaScaledEngineering/mss-xcade
Modular Signal System 4 Port Complex Cascade
233 partsGPL-3.0 - 2 layers68.6 × 53.3 mm
- 4 layers112 × 57 mm
- 4 layers100 × 80 mm
AnalogDelay
aselectroworks/Analog_Delay
Multiple function BBD Analog Delay assisted by Digital Domain.
266 parts1GPL-3.0
Questions
How big is the Ckt iiab PCB?
It measures 95.2 × 57.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ckt iiab use?
67 parts, built around the ATTINY861A-SU, AP7381-50Y, SM04B-SRSS-TB and JS202011SCQN. 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 iiab KiCad files?
From the IowaScaledEngineering/ckt-iiab repository on GitHub, at the commit this page was made from: the board is kicad/ckt-iiab/ckt-iiab.kicad_pcb and its schematic kicad/ckt-iiab-test/ckt-iiab-test.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ckt iiab design in my own project?
Its repository states no licence, so its author keeps all rights: ask IowaScaledEngineering before reusing the design.