2 layers8.5 × 41 mm
6 layers45.5 × 96 mm
Linht hw
M17-Project/LinHT-hw221LinHT - Linux-based, SDR handheld transceiver.
- Size
- 45.5 × 96 mm
- Copper layers
- 6
- Thickness
- 0.93 mm
- Parts
- 258
- Nets
- 301
- Pads
- 974
- Tracks, vias
- 1,823, 673
- Pours
- 40
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Jun 2025
- Updated
- 21 Oct 2026
Overview
Linht hw is an open-source printed circuit board by M17-Project, from the M17-Project/LinHT-hw repository on GitHub. It is a 6-layer board of 45.5 × 96 mm with 258 parts on 301 nets, routed with 1,823 tracks and 673 vias.
It is built around the ATTINY826-MU, PE4312C-Z and BQ25792RQMR, with the GRF5604, CL21A106KBYQNNE and CC0402JRNPO9BN102 among its other parts. Its parts include 95 capacitors, 63 resistors, 12 connectors, 9 inductors and 5 ICs. It belongs with the radio and wireless boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATTINY826-MU
VQFN-20(3x3)-40℃~+85℃ 1.8V~5.5V 128Byte 12bit 18 1KB 20MHz 8 Bit 8KB AVR Built-in FLASH VQFN-20(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PE4312C-Z
QFN-20-EP(4x4)-55℃~+105℃ 1MHz~4GHz 31.5dB 50Ω Digitally programmable attenuation、Multi-step attenuation、Digital control interface、Parallel control interface QFN-20-EP(4x4) RF Attenuators ROHSpSemiRF Attenuators
BQ25792RQMR
QFN-29(4x4)-40℃~+85℃ 16.8V 1~4 21uA 3.6V~24V 5A Charging IC I2C Lithium Battery Support QFN-29(4x4) Battery Management ROHSTexas InstrumentsBattery ManagementGRF5604
-- Lack of specifications ROHSGuerrilla RFUncategorised
CL21A106KBYQNNE
080510uF 50V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CC0402JRNPO9BN102
04021nF 50V NP0 ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL31B226KPHNNNE
120610V 22uF X7R ±10% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
BSS138-7-F-ES
SOT-23-55℃~+150℃ 1 N-channel 1.5Ω@10V 1V 2.2pF 25pF 400mA 417mW 60V 650pC@4.5V 9.7pF N-Channel SOT-23 MOSFETs ROHSElecSuperMOSFETs
BLM21PG221SN1D
08051 220Ω@100MHz 2A 45mΩ ±25% 0805 Ferrite Beads ROHSMurataFerrite BeadsGJM1555C1H330FB01D
040233pF 50V C0G ±1% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMTCC0402JRNPO9BN270
040227pF 50V NP0 ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMTCC0402JRNPO9BN471
0402470pF 50V NP0 ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
side-pcb/README.mdLinHT Side Buttons
A small side PCB for the LinHT handheld transceiver, carrying the two side buttons (PTT area) of the radio.
The board is soldered edge-on (perpendicularly) to the side of the LinHT main PCB. Its outline matches the original side-button board of the Retevis C62 donor radio, so it fits the stock enclosure and rubber button covers without modifications.
Bill of Materials
Apart from the PCB itself you need:
- 2× metal button dome (snap dome), e.g. AliExpress item 33001419494
The domes are placed over the exposed button contacts and held in place by adhesive tape or the button membrane.
Fabrication
Gerber files are generated by the CI and published on the
LinHT hardware page, or can be exported
locally from side-pcb.kicad_pcb with KiCad 10.
Parts
258| Qty | Value | Footprint | References |
|---|---|---|---|
| 33 | 100n | Capacitor_SMD:C_0402_1005Metric | C5, C10, C13, C21, C22, C23, C24, C25, C32, C33, C34, C35, C38, C49, C57, C59 +17 |
| 16 | 100k | Resistor_SMD:R_0402_1005Metric | R3, R4, R12, R13, R18, R19, R20, R30, R54, R55, R56, R58, R59, R62, R65, R67 |
| 16 | 10u | Capacitor_SMD:C_0805_2012Metric | C18, C70, C71, C74, C75, C76, C77, C82, C83, C84, C85, C86, C87, C89, C90, C94 |
| 15 | 100R | Resistor_SMD:R_0402_1005Metric | R5, R6, R7, R8, R9, R10, R11, R15, R16, R33, R38, R45, R50, R51, R63 |
| 8 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H2, H4, H5, H6, H7, H8, H9, H10 |
| 6 | Tab | kikit:Tab | TAB1, TAB2, TAB3, TAB4, TAB5, TAB6 |
| 5 | 10n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C61 |
| 5 | 1n | Capacitor_SMD:C_0402_1005Metric | C15, C47, C48, C50, C88 |
| 5 | 22u | Capacitor_SMD:C_1206_3216Metric | C11, C28, C29, C30, C31 |
| 5 | 47k | Resistor_SMD:R_0402_1005Metric | R25, R26, R35, R39, R44 |
| 5 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3, Q4, Q5, Q6 |
| 4 | 100p | Capacitor_SMD:C_0402_1005Metric | C14, C55, C91, C92 |
| 4 | 10u | Capacitor_SMD:C_0402_1005Metric | C44, C46, C51, C53 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric | C40, C41, C43, C45 |
| 4 | 2u2 | Capacitor_SMD:C_0402_1005Metric | C16, C19, C36, C37 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R34, R36, R70 |
| 3 | 220R | Inductor_SMD:L_0805_2012Metric | FB1, FB2, FB3 |
| 3 | 33p | Capacitor_SMD:C_0402_1005Metric | C52, C54, C56 |
| 3 | GND | parts:Solder_Pad-1.7x2.2mm | J6, J7, J10 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 2 | 120R | Inductor_SMD:L_0805_2012Metric | FB4, FB5 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R14, R48 |
| 2 | 22k | Resistor_SMD:R_0402_1005Metric | R2, R31 |
| 2 | 27p | Capacitor_SMD:C_0402_1005Metric | C12, C66 |
| 2 | 2k | Resistor_SMD:R_0402_1005Metric | R27, R52 |
| 2 | 30k/1% | Resistor_SMD:R_0402_1005Metric | R22, R24 |
| 2 | 470p | Capacitor_SMD:C_0402_1005Metric | C39, C42 |
| 2 | 47n | Capacitor_SMD:C_0402_1005Metric | C68, C69 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R46, R47 |
| 2 | LED | LED_SMD:LED_0402_1005Metric | D4, D5 |
| 2 | NM | Capacitor_SMD:C_0402_1005Metric | C17, C20 |
| 2 | PE4312 | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U2, U11 |
| 2 | SPEAKER | TestPoint:TestPoint_Pad_D4.0mm | J16, J17 |
| 1 | 0R | Resistor_SMD:R_0402_1005Metric | R17 |
| 1 | 10R | Resistor_SMD:R_0402_1005Metric | R37 |
| 1 | 10k | parts:Connector_08x09mm_pot_switch | SW2 |
| 1 | 10n | Inductor_SMD:L_0402_1005Metric | L8 |
| 1 | 12.0M | Oscillator:Oscillator_SMD_ECS_2520MV-xxx-xx-4Pin_2.5x2.0mm | Y2 |
| 1 | 127k | Resistor_SMD:R_0402_1005Metric | R66 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 133k/1% | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | 150R | Resistor_SMD:R_0402_1005Metric | R42 |
| 1 | 150R/0.5W | Resistor_SMD:R_0402_1005Metric | R43 |
| 1 | 15k | Resistor_SMD:R_0402_1005Metric | R49 |
| 1 | 1812L200/16GR | parts:Fuse_1812L200 | F1 |
| 1 | 18p | Capacitor_SMD:C_0402_1005Metric | C26 |
| 1 | 1PPS | TestPoint:TestPoint_Pad_D1.0mm | TP14 |
| 1 | 1k96 | Resistor_SMD:R_0402_1005Metric | R28 |
| 1 | 1uH | parts:SLO0520H1R0MTT | L9 |
| 1 | 2.2 uH | parts:L_TDK_SPM6530 | L3 |
| 1 | 2.4nH | Inductor_SMD:L_0603_1608Metric | L7 |
| 1 | 2.5mm | parts:Jack_2.5mm_PJ-204_nodrill_Horizontal | J13 |
| 1 | 20nH | Inductor_SMD:L_0402_1005Metric | L5 |
| 1 | 220k/1% | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | 22p | Capacitor_SMD:C_0402_1005Metric | C27 |
| 1 | 23nH | parts:0908SQ-23N | L6 |
| 1 | 2S Battery | parts:Connector_01x03_BT-003E | J2 |
| 1 | 3.5mm | parts:Jack_3.5mm_CUI_SJ1-3525N_Modified | J14 |
| 1 | 30k1 | Resistor_SMD:R_0402_1005Metric | R69 |
| 1 | 32MHz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 39n | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | 3DFIX | TestPoint:TestPoint_Pad_D1.0mm | TP13 |
| 1 | 3p | Capacitor_SMD:C_0402_1005Metric | C67 |
| 1 | 4.7 uH | parts:L_Bourns-SRN6028C | L4 |
| 1 | 5k23 | Resistor_SMD:R_0402_1005Metric | R68 |
| 1 | 6k04 | Resistor_SMD:R_0402_1005Metric | R29 |
| 1 | 6k04/1% | Resistor_SMD:R_0402_1005Metric | R64 |
| 1 | 6p8 | Capacitor_SMD:C_0402_1005Metric | C58 |
| 1 | 82n | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | ATtiny826 | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U14 |
| 1 | Antenna | parts:Connector_SMA_4x10mm | J1 |
| 1 | BQ25792RQMR | parts:QFN-29_L4.0-W4.0-P0.40-TL-BQ25792RQMR | U12 |
| 1 | BQ_D+ | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | BQ_D- | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | BQ_STAT | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | BTN_2 | parts:Solder_Pad-1.7x2.2mm | J9 |
| 1 | Conn_Coaxial | parts:Connector_ufl_1909763-1 | J4 |
| 1 | GND spring | TestPoint:TestPoint_Pad_D4.0mm | J3 |
| 1 | GPIO1 | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | GRF5604 | parts:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm_ThermalVias | U7 |
The 223 most common of 258 parts.
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Questions
How big is the Linht hw PCB?
It measures 45.5 × 96 mm and has 6 copper layers, 0.93 mm thick.
What parts does the Linht hw use?
258 parts, built around the ATTINY826-MU, PE4312C-Z, BQ25792RQMR and GRF5604. 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 Linht hw KiCad files?
From the M17-Project/LinHT-hw repository on GitHub, at the commit this page was made from: the board is linht-hw.kicad_pcb and its schematic audio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Linht hw design in my own project?
Its repository states no licence, so its author keeps all rights: ask M17-Project before reusing the design.