4 layers33.5 × 42 mm Corn LoRa, the printed circuit board in 3D

Corn LoRa

Q: How big is the Corn LoRa PCB?

It measures 33.5 × 42 mm and has 4 copper layers, 1.6 mm thick.

Q: What parts does the Corn LoRa use?

56 parts, built around the RP2040, PE4259-63, SX1262IMLTRT and W25Q128JVSIQ. 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.

Q: Where can I download the Corn LoRa KiCad files?

From the VMS-HC/Corn-LoRa repository on GitHub, at the commit this page was made from: the board is Design/Corn_LoRa.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Q: Can I use the Corn LoRa design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

VMS-HC/Corn-LoRa

A LoRa board included in the Corn Series of electronics!

Open in PCBKit

Size: 33.5 × 42 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 56
Nets: 79
Pads: 237
Tracks, vias: 517, 156
Pours: 5
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 4 Oct 2026
Updated: 27 Oct 2026

Overview

Corn LoRa is an open-source printed circuit board by VMS-HC, from the VMS-HC/Corn-LoRa repository on GitHub, published under the MIT licence. It is a 4-layer board of 33.5 × 42 mm with 56 parts on 79 nets, routed with 517 tracks and 156 vias.

It is built around the RP2040, PE4259-63 and SX1262IMLTRT, with the W25Q128JVSIQ, AP2112K-3.3 and 0900FM15K0039E among its other parts. Its parts include 28 capacitors, 8 resistors, 5 ICs, 3 inductors and 2 connectors. It belongs with the radio and wireless boards and the RP2040 boards of this library.

Main components

README

README.md

Moving Rainbow Gradient Text

A not so basic electronic project... This is a LoRa Board which is great for meshtastic but not great for my sanity when routing! This has a SX1262 radio chip and uses a RP2040 for the microcontroller along with a crystal oscillator for the RP2040 like any normal dev board. Corn LoRa also includes a *0900FM15D0039* as a IPD (integrated passive device) by Johanson which controls the balun and filtering (868-915MHz, may be different footprint) To switch between TX and RX, it uses an RF switch, controlled by DIO2; along with a PE4259 for a 2 channel switcher (as mentioned above!). It also uses a bulky non-standard Conn for an antenna! Ty for looking and have a good day! <3!

# Corn-LoRa PCB photo!

3D Render photo!

Schematic!

FAQ

CAD?

Here! https://cad.onshape.com/documents/798bf0a7dc11aab5a7bf582d/w/40104e5f41c3cdcce0e1b7a0/e/90af93f35366755db2896de5?renderMode=0&uiState=6ae0c972e6e866bde4647e71

BOM?

There are 2 BOM technically one has the LCSC part numbers and the others is a quote from LCSC with links to parts too!

Is this good for beginners?

Yes and no, if you know EDA/Kicad basics and could make a dev board without trouble you should be able to make this!

How many layers is the PCB?

This is a 4 layer PCB with a Earth layer and a +3V3 layer!

Can I contribute?

YES YOU CAN!!!! Take a peek at the Contributing section for a better guide on contributing!

Authors

Parts

Qty	Value	Footprint	References
13	100nF	fixed:C_0402_1005Metric	C6, C8, C13, C14, C17, C18, C19, C20, C21, C22, C23, C26, C27
4	LOGO	LOGO	G*, G, G, G*
3	3.3pF	fixed:C_0402_1005Metric	C5, C7, C12
2	10uF	fixed:C_0402_1005Metric	C24, C25
2	15pF	fixed:C_0402_1005Metric	C10, C11
2	1K	fixed:R_0402_1005Metric	R2, R6
2	1uF	fixed:C_0402_1005Metric	C15, C16
2	27.4	fixed:R_0402_1005Metric	R4, R5
2	47nF	fixed:C_0402_1005Metric	C1, C2
2	5.1K	fixed:R_0402_1005Metric	R8, R9
2	9.1nH	Inductor_SMD:L_0402_1005Metric	L1, L2
1	0900FM15K0039	RF_Converter:Balun_Johanson_0900FM15K0039	FL1
1	100	fixed:R_0402_1005Metric	R1
1	10K	fixed:R_0402_1005Metric	R3
1	10nF	fixed:C_0402_1005Metric	C28
1	12MHz	Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm	Y2
1	15uH	Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder	L3
1	1nF	fixed:C_0402_1005Metric	C3
1	32MHz	Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	39pF	fixed:C_0402_1005Metric	C4
1	470nF	fixed:C_0402_1005Metric	C9
1	AP2112K-3.3	Package_TO_SOT_SMD:SOT-23-5	U5
1	BLM15AX102SN1D	Inductor_SMD:L_0402_1005Metric	FB1
1	BOOTSEL	Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS	SW1
1	Conn_Coaxial_Small	Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical	J2
1	PE4259	Package_TO_SOT_SMD:SOT-363_SC-70-6	U1
1	RESET	Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS	SW2
1	RP2040	Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U4
1	SX1262IMLTRT	Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm	U2
1	USB_C_Receptacle_USB2.0_16P	Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J1
1	W25Q128JVS	Package_SO:SOIC-8_5.3x5.3mm_P1.27mm	U3

Questions

How big is the Corn LoRa PCB?

It measures 33.5 × 42 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Corn LoRa use?

56 parts, built around the RP2040, PE4259-63, SX1262IMLTRT and W25Q128JVSIQ. 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 Corn LoRa KiCad files?

From the VMS-HC/Corn-LoRa repository on GitHub, at the commit this page was made from: the board is Design/Corn_LoRa.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Corn LoRa design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Radio and wireless RP2040

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/vms-hc-corn-lora" title="Corn LoRa in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/vms-hc-corn-lora.jpg" alt="Corn LoRa" width="1200" height="900">

A picture that opens the board, for a README

[![Corn LoRa](https://pcbkit.io/embed/boards/vms-hc-corn-lora.jpg?size=s)](https://pcbkit.io/boards/vms-hc-corn-lora)

Source

Repository: VMS-HC/Corn-LoRa
Board file: Design/Corn_LoRa.kicad_pcb
Commit: 981802b
Licence: MIT

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