4 layers
2 layers42 × 21 mm
Solderless
twfth9/CW-Tracker- Size
- 42 × 21 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 33
- Pads
- 78
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 24 Mar 2024
- Updated
- 27 Oct 2025
Overview
Solderless is an open-source printed circuit board by twfth9, from the twfth9/CW-Tracker repository on GitHub. It is a 2-layer board of 42 × 21 mm with 12 parts on 33 nets.
It is built around the ATTINY416-MN, TLV61070ADBV and SI5351B-B-GM1, with the TPS22919DCK and MMUN2238LT1G(TP) among its other parts. Its parts include 4 ICs, 2 resistors, 2 inductors, 1 capacitor and 1 diode. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATTINY416-MN
QFN-20-EP(3x3)-40℃~+105℃ 1.8V~5.5V 10bit 128Byte 18 20MHz 256Byte 4KB 8 Bit 8bit AVR Built-in FLASH QFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TLV61070ADBV
SOT-23-6-40℃~+125℃@(TJ) 1 2.2V~5.5V 2.5A 3uA 500mV~5.5V 550kHz、1MHz Adjustable Boost Boost Built-in Yes SOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
SI5351B-B-GM1
QFN-16(3x3)QFN-16(3x3) Clock Generators, PLLs, Frequency Synthesizers ROHSSkyworks SolutionsClock Generators / Frequency Synthesizers / PLL
TPS22919DCK
SC-70-6-40℃~+125℃ 1 1.5A 1.6V~5.5V 89mΩ Active High Load Switch Output discharge function、Soft-start、Overcurrent Protection、Over temperature protection、Short-Circuit Protection SC-70-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
MMUN2238LT1G(TP)
SOT-23SOT-23 Digital Transistors ROHSTECH PUBLICDigital Transistors
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 100mH | Inductor_THT:L_Axial_L12.0mm_D5.0mm_P15.24mm_Horizontal_Fastron_MISC | L2 |
| 1 | 1k8 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 1k8 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 4.7uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | ATtiny416-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U1 |
| 1 | Battery_Cell | Solderless_CR2032_Holder:CR2032_PCBcutout | BT1 |
| 1 | ESD156B1W | Diode_SMD:D_0201_0603Metric | D1 |
| 1 | MMUN2238LT1G | Package_TO_SOT_SMD:SOT-23-3 | Q1 |
| 1 | Si5351B-B-GM1 | Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.45x1.45mm | U4 |
| 1 | TLV61070ADBV | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | TPS22919DCK | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U2 |
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Questions
How big is the Solderless PCB?
It measures 42 × 21 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Solderless use?
12 parts, built around the ATTINY416-MN, TLV61070ADBV, SI5351B-B-GM1 and TPS22919DCK. 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 Solderless KiCad files?
From the twfth9/CW-Tracker repository on GitHub, at the commit this page was made from: the board is Transmitter/KiCAD/Button Transmitter/Prototypes/Solderless/Solderless.kicad_pcb and its schematic Transmitter/KiCAD/220MHz Oscillator/220_MHz_Oscillator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Solderless design in my own project?
Its repository states no licence, so its author keeps all rights: ask twfth9 before reusing the design.