LottBespittingDiode

chaowoses·LottBespittingDiode·hardware/LBD.kicad_pcb

About the LottBespittingDiode PCB

LottBespittingDiode is an open source RP2040/RP2350 PCB design by chaowoses, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 34.2 × 33.5 mm, with 50 components from 24 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the TPSM828214SILR and W25Q128JVSIQ. By type, the board carries 18 capacitors, 15 resistors, 9 diodes, 3 ICs, 2 connectors and 1 transistor.

From the project

A high-intensity IR blaster built on the RP2040. Browser-native control over WebSerial, MOSFET-driven IR output, 38kHz NEC modulation. Fully open source.

Named for Mrs. Lott, the worst teacher I ever had, and her classroom projector.

- Web Controller: Full single-page app to manage IR remotes, browse the Flipper-IRDB, compose NEC signals, and transmit over WebSerial - In-Browser Schematic Viewer: Browse all hardware schematics directly on the landing page via KiCanvas - Auto-Generated BOM: Bill of materials extracted from KiCad schematics and embedded in the landing page, updated on every…

Main components on the LottBespittingDiode

RP2040 TPSM828214SILR W25Q128JVSIQ

LottBespittingDiode bill of materials (BOM)

50 components, 24 distinct parts.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	TPSM828214SILR	TPSM828214SILR	U4
1	W25Q128JVSIQ	W25Q128JVSIQ	U5
1	AO3400A	SOT-23	Q1
1	12 MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	Conn_01x03_Pin	PinHeader_1x03_P2.54mm_Vertical_SMD_Pin1Left	J1
1	USB4155-03-C	GCT_USB4155-03-C_REVA	J2
1	BOOTSEL	SW_SPST_B3U-1000P	SW2
8	IN-S126ESGHIR	LED_IN-S12_INL	D1, D2, D3, D4, D5, D6, D7, D8
1	MM3Z6V2	D_SOD-323	D9
2	15p	C_0201_0603Metric	C4, C5
11	100n	C_0201_0603Metric	C6, C7, C8, C9, C10, C11, C12, C13 +3
1	4.7u	C_0603_1608Metric	C14
1	22u	C_0603_1608Metric	C15
2	1u	C_0402_1005Metric	C19, C20
1	10u	C_0603_1608Metric	C21
2	5.1k	R_0201_0603Metric	R3, R13
1	1k (0603)	R_0603_1608Metric	R6
1	1k	R_0201_0603Metric	R7
3	10k	R_0201_0603Metric	R8, R9, R18

Show 4 more

Qty	Part	Footprint	Refs
1	100k	R_0201_0603Metric	R10
2	22	R_0201_0603Metric	R11, R12
4	22	R_0603_1608Metric	R14, R15, R16, R17
1	33	R_0603_1608Metric	R19

LottBespittingDiode design files

The KiCad project lives in the chaowoses/LottBespittingDiode repository on GitHub; these links point at the commit this page was built from.

Layouthardware/LBD.kicad_pcb
Schematichardware/LBD.kicad_sch

LottBespittingDiode: common questions

What microcontroller does the LottBespittingDiode use?

The LottBespittingDiode is built around the RP2040, from the RP2040/RP2350 family.

How big is the LottBespittingDiode PCB?

The LottBespittingDiode measures 34.2 × 33.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the LottBespittingDiode?

50 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the LottBespittingDiode design files?

From the chaowoses/LottBespittingDiode repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LottBespittingDiode design in my own project?

Yes, under the terms of its GPL-3.0 license, which chaowoses chose for the repository.

Can I test firmware for the LottBespittingDiode without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.