4 layers80 × 50 mm
2 layers
Attiny light
amnessa/KiCAD- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 36
- Nets
- 26
- Pads
- 93
- Tracks, vias
- 227, 17
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Apr 2026
- Updated
- 4 Nov 2026
Overview
Attiny light is an open-source printed circuit board by amnessa, from the amnessa/KiCAD repository on GitHub. It is a 2-layer board with 36 parts on 26 nets, routed with 227 tracks and 17 vias.
It is built around the ATTINY85-20SU, DW01A and TP4054, with the AO3400A, FS8205A and UJC-VP-3-SMT-TR among its other parts. Its parts include 13 resistors, 6 capacitors, 3 ICs, 3 transistors and 2 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
6
ATTINY85-20SU
SOIC-8-208mil-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH SOIC-8-208mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery Management
TP4054
SOT-23-5L-40℃~+85℃ 1 25uA 4.2V 4.2V~6.5V 500mA Charging IC Lithium Battery Not supported 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 SOT-23-5L Battery Management ROHSUMWBattery Management
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsFS8205A
SOT-23-6-55℃~+150℃ 1.2V 1.5W 2 N-Channel 20V 31.5mΩ@2.5V 466pF 5.7nC@4.5V 58pF 65pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETsUJC-VP-3-SMT-TR
SMDSMD USB Connectors ROHSCUIUSB Connectors
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100 | Resistor_SMD:R_0402_1005Metric | R5, R7, R10 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R6, R8 |
| 2 | 100n | Capacitor_SMD:C_0402_1005Metric | C3, C6 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C2, C4 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R9, R11 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 33 | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 3k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 47 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
| 1 | AVR_ISP | Attiny_light:AVR_ISP_Pogo_2x03_P2.54mm_SMD | J2 |
| 1 | B+ | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1 |
| 1 | B- | TestPoint:TestPoint_Pad_2.0x2.0mm | TP2 |
| 1 | BYPASS_PROT | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | FS8205A | Package_TO_SOT_SMD:SOT-23-6 | Q3 |
| 1 | L+ | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | L1 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP7 |
| 1 | L2 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | PB4 | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | SW | TestPoint:TestPoint_Pad_1.5x1.5mm | TP4 |
| 1 | SW_GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | TP4054 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | UJC-VP-3-SMT-TR | Attiny_light:USB_C_Receptacle_SameSky_UJC-VP-3-SMT_Vertical | J1 |
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Questions
What parts does the Attiny light use?
36 parts, built around the ATTINY85-20SU, DW01A, TP4054 and AO3400A. 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 Attiny light KiCad files?
From the amnessa/KiCAD repository on GitHub, at the commit this page was made from: the board is projects/Attiny_light/Attiny_light/Attiny_light.kicad_pcb and its schematic projects/Attiny_light/Attiny_light/Attiny_light.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Attiny light design in my own project?
Its repository states no licence, so its author keeps all rights: ask amnessa before reusing the design.