2 layers117.1 × 40.9 mm
4 layers66 × 155 mm
- Size
- 66 × 155 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 339
- Nets
- 171
- Pads
- 807
- Tracks, vias
- 1,870, 803
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Feb 2026
- Updated
- 7 Nov 2026
Overview
WK-3 is an open-source printed circuit board by zOnlyKroks, from the zOnlyKroks/pcb-consortium repository on GitHub, published under the CC0-1.0 licence. It is a 4-layer board of 66 × 155 mm with 339 parts on 171 nets, routed with 1,870 tracks and 803 vias.
It is built around the MC1496D, LM386 and LMV324, with the LP2985-50DBV, 2SC3356 and AO3401A among its other parts. Its parts include 133 capacitors, 111 resistors, 44 inductors, 15 transistors and 7 crystals.
Main components
12
MC1496D
SOIC-140℃~+70℃ 1kHz~10MHz 3.5dB 4mA Amplitude Modulation (AM) SOIC-14 RF Modulators and Demodulators ROHSonsemiUncategorised
LM386
SOP-80.2% 0℃~+70℃ 4V~12V 4mA 50dB 700mWx1@8Ω Analog voltage gain SOP-8 Audio Amplifiers ROHSGcoreAudio Power OpAmpsLMV324
SOP-14-40℃~+85℃ 1MHz 2.8dB 250nA 3V~5.5V 4 400V/ms 40mA 40uV/√Hz@1kHz 430uA 5nA 7mV Built-in compensation、ESD protection SOP-14 Operational Amplifier ROHSIDCHIPOperational Amplifier
LP2985-50DBV
SOT-23-5-40℃~+125℃@(Tj) 1 150mA 16V 30uVrms 45dB@(1kHz) 580mV@(150mA) 5V Fixed Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
2SC3356
SOT-231 NPN 100mA 12V 1uA 200mW 300 3V 7GHz NPN SOT-23 Bipolar (BJT) ROHSGuangdong HottechBipolar (BJT)AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
ETC1-1-13
-- Balun ROHSMACOMBalunMMBTH10
SOT-23-55℃~+150℃ 1 NPN 100nA 200 225mW 25V 3V 500mV 50mA 650MHz NPN SOT-23 Bipolar (BJT) ROHSALJBipolar (BJT)
BAR64-02V
SOD-523Diodes - General PurposeJiangsu Changjing Electronics Technology (CJ)BH-18650-B1BA002
--25~85℃ 18650 Battery holder Gold plating Phosphor bronze - Batter Holder ROHSMYOUNGButton And Strip Battery Connector
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes1SV305,L3F
SC-79(SOD-523)10V 270mΩ 3@C1V/C4V 3nA 6.6pF@4V,1MHz Independent SC-79(SOD-523) Diodes - Variable Capacitance ROHSToshibaDiodes - Variable Capacitance
README
README.mdPCB / Circuit Designs
Support & Issues
If something is broken, unclear, or you need help assembling:
- Open a GitHub Issue
- I’ll try to help when I can
Use at your own risk 🙂
Parts
339| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 1n | Capacitor_SMD:C_0603_1608Metric | C224, C226, C234, C236, C247, C248, C257, C258, C263, C301, C302, C306, C308, C401, C404, C409 +6 |
| 15 | 100n | Capacitor_SMD:C_0603_1608Metric | C102, C105, C108, C208, C264, C303, C307, C309, C616, C618, C619, C624, C628, C703, C705 |
| 15 | 10n | Capacitor_SMD:C_0603_1608Metric | C103, C205, C211, C216, C225, C235, C260, C261, C417, C501, C602, C605, C611, C612, C613 |
| 14 | 10k | Resistor_SMD:R_0603_1608Metric | R102, R103, R108, R203, R205, R208, R209, R210, R226, R231, R402, R506, R518, R607 |
| 14 | 1k | Resistor_SMD:R_0603_1608Metric | R104, R201, R222, R232, R248, R249, R303, R307, R308, R309, R504, R513, R617, R702 |
| 13 | 10u | Capacitor_SMD:C_0805_2012Metric | C101, C106, C107, C201, C207, C310, C315, C316, C514, C603, C617, C701, C706 |
| 11 | 22p | Capacitor_SMD:C_0603_1608Metric | C242, C252, C305, C312, C402, C403, C412, C502, C512, C610, C621 |
| 11 | 4.7k | Resistor_SMD:R_0603_1608Metric | R105, R207, R242, R243, R253, R613, R614, R615, R619, R621, R622 |
| 10 | 47p | Capacitor_SMD:C_0603_1608Metric | C203, C231, C233, C241, C251, C406, C407, C411, C503, C601 |
| 10 | 56n | Inductor_SMD:L_0805_2012Metric | L240, L243, L248, L250, L253, L402, L403, L405, L410, L413 |
| 8 | 100 | Resistor_SMD:R_0603_1608Metric | R213, R219, R233, R251, R252, R306, R514, R609 |
| 8 | 2.2k | Resistor_SMD:R_0603_1608Metric | R106, R202, R240, R241, R246, R302, R312, R612 |
| 8 | 22n | Inductor_SMD:L_0805_2012Metric | L242, L244, L252, L254, L412, L414, L503, L505 |
| 8 | 33p | Capacitor_SMD:C_0603_1608Metric | C212, C243, C244, C245, C246, C405, C408, C615 |
| 7 | 330n | Inductor_SMD:L_0805_2012Metric | L201, L202, L245, L255, L301, L415, L504 |
| 7 | 47 | Resistor_SMD:R_0603_1608Metric | R224, R247, R406, R508, R515, R603, R611 |
| 6 | 10 | Resistor_SMD:R_0603_1608Metric | R227, R237, R301, R501, R507, R701 |
| 6 | 220 | Resistor_SMD:R_0603_1608Metric | R223, R244, R245, R250, R401, R602 |
| 6 | 22k | Resistor_SMD:R_0603_1608Metric | R215, R221, R503, R505, R606, R620 |
| 6 | 470 | Resistor_SMD:R_0603_1608Metric | R216, R217, R405, R519, R520, R610 |
| 6 | 47n | Inductor_SMD:L_0805_2012Metric | L246, L249, L256, L302, L304, L416 |
| 6 | 68p | Capacitor_SMD:C_0603_1608Metric | C213, C240, C250, C304, C410, C604 |
| 5 | 100k | Resistor_SMD:R_0603_1608Metric | R101, R206, R510, R601, R618 |
| 5 | 37.4MHz 9pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y201, Y602, Y603, Y604, Y605 |
| 5 | 680 | Resistor_SMD:R_0603_1608Metric | R310, R404, R512, R605, R608 |
| 4 | 10p | Capacitor_SMD:C_0603_1608Metric | C259, C314, C505, C606 |
| 4 | 1u | Capacitor_SMD:C_0603_1608Metric | C204, C209, C510, C625 |
| 4 | 2SC3356 | Package_TO_SOT_SMD:SOT-23 | Q203, Q204, Q401, Q602 |
| 4 | 47k | Resistor_SMD:R_0603_1608Metric | R214, R403, R502, R511 |
| 4 | 8.2p | Capacitor_SMD:C_0603_1608Metric | C265, C607, C608, C609 |
| 4 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q101, Q102, Q104, Q105 |
| 3 | 100p | Capacitor_SMD:C_0603_1608Metric | C232, C311, C313 |
| 3 | 22 | Resistor_SMD:R_0603_1608Metric | R234, R304, R305 |
| 3 | 33n | Inductor_SMD:L_0805_2012Metric | L241, L251, L411 |
| 3 | 47u | Inductor_SMD:L_1210_3225Metric | L602, L603, L604 |
| 3 | 510p | Capacitor_SMD:C_0603_1608Metric | C620, C622, C623 |
| 3 | ETC1-1-13 | Transformer_SMD:Transformer_MACOM_SM-22 | T201, T202, T203 |
| 3 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H101, H102, H103 |
| 3 | MMBTH10 | Package_TO_SOT_SMD:SOT-23 | Q501, Q502, Q503 |
| 2 | 100n | Inductor_SMD:L_0805_2012Metric | L501, L502 |
| 2 | 110p | Capacitor_SMD:C_0603_1608Metric | C515, C516 |
| 2 | 15p | Capacitor_SMD:C_0603_1608Metric | C230, C614 |
| 2 | 18p | Capacitor_SMD:C_0603_1608Metric | C504, C506 |
| 2 | 39k | Resistor_SMD:R_0603_1608Metric | R225, R517 |
| 2 | 4.7n | Capacitor_SMD:C_0603_1608Metric | C202, C206 |
| 2 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C104, C629 |
| 2 | 470k | Resistor_SMD:R_0603_1608Metric | R204, R616 |
| 2 | 470p | Capacitor_SMD:C_0603_1608Metric | C626, C627 |
| 2 | 68n | Inductor_SMD:L_0805_2012Metric | L247, L404 |
| 2 | BAR64-02V | Diode_SMD:D_SOD-523 | D401, D402 |
| 2 | BH-18650-B1BA002 | WK3:BatteryHolder_MYOUNG_BH-18650-B1BA002 | BT101, BT102 |
| 1 | 0.75A hold | Fuse:Fuse_1206_3216Metric | F101 |
| 1 | 10.5k | Resistor_SMD:R_0603_1608Metric | R311 |
| 1 | 100u | Capacitor_SMD:CP_Elec_6.3x5.4 | C704 |
| 1 | 10k VOLUME | Potentiometer_THT:Potentiometer_Alps_RK09K_Single_Vertical | RV601 |
| 1 | 15.4k | Resistor_SMD:R_0603_1608Metric | R107 |
| 1 | 180k | Resistor_SMD:R_0603_1608Metric | R109 |
| 1 | 1N4148WS | Diode_SMD:D_SOD-323 | D601 |
| 1 | 1SV305 | Diode_SMD:D_SOD-523 | D501 |
| 1 | 1u | Inductor_SMD:L_0805_2012Metric | L401 |
| 1 | 220n | Inductor_SMD:L_0805_2012Metric | L601 |
| 1 | 220u | Capacitor_SMD:CP_Elec_6.3x5.4 | C702 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q103 |
| 1 | 2SC3357 | Package_TO_SOT_SMD:SOT-89-3 | Q301 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R604 |
| 1 | 330n | Inductor_SMD:L_1008_2520Metric | L303 |
| 1 | 38.4MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y601 |
| 1 | 54.000MHz 10pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y501 |
| 1 | 7.5p | Capacitor_SMD:C_0603_1608Metric | C517 |
| 1 | LM386 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U701 |
| 1 | LMV324 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U201 |
| 1 | LP2985-5.0 | Package_TO_SOT_SMD:SOT-23-5 | U101 |
| 1 | MC1496 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U202 |
| 1 | MC3361 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U601 |
| 1 | MIC electret | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J201 |
| 1 | MMBFJ310 | Package_TO_SOT_SMD:SOT-23 | Q601 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q201 |
| 1 | POWER | Button_Switch_SMD:SW_SPDT_PCM12 | SW101 |
| 1 | PTT | Button_Switch_SMD:SW_SPST_TL3342 | SW102 |
| 1 | RED PWR | LED_SMD:LED_0603_1608Metric | D102 |
The 333 most common of 339 parts.
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Questions
How big is the WK-3 PCB?
It measures 66 × 155 mm and has 4 copper layers, 1.6 mm thick.
What parts does the WK-3 use?
339 parts, built around the MC1496D, LM386, LMV324 and LP2985-50DBV. 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 WK-3 KiCad files?
From the zOnlyKroks/pcb-consortium repository on GitHub, at the commit this page was made from: the board is WalkieTalkies/WK-3/WK-3.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the WK-3 design in my own project?
Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).