KOB-Sounder Interface

MorseKOB·MuKOB·hw/MK-KS.kicad_pcb

KOB-Sounder Interface PCB layout, top view — open source board by MorseKOB

About the KOB-Sounder Interface PCB

KOB-Sounder Interface is an open source PCB design by MorseKOB, published on GitHub under the MIT license. It is a 2-layer board measuring 104.1 × 78.7 mm, with 54 components from 47 distinct parts.

Other key parts include the LM393ADR and LM358. By type, the board carries 10 resistors, 9 capacitors, 8 diodes, 5 test points, 4 transistors and 4 connectors.

From the project

MuKOB (μKOB) - MorseKOB for a microcontroller-based platform.

Raspberry Pi Pico W (RP2040 CPU) based device with a built-in display and a terminal interface. Uses built-in wifi to connect to the MorseKOB Server.

It interfaces to a KOB, Key + Sounder, Key + Tone, Paddle + Tone, etc. to provide Morse input and output. The device can operate completely stand-alone (using the display-touchscreen) or it can connect to a VT-220 terminal (or emulator like Putty) to provide a larger interface and allow keyboard input.

Main components on the KOB-Sounder Interface

KOB-Sounder Interface bill of materials (BOM)

54 components, 47 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	LM393ADR MCP1702T-3302E Texas Instruments	SOT-23	U1
1	LM358	SOIC-8_3.9x4.9mm_P1.27mm	U3
1	LM393ADR Texas Instruments	SOIC-8_3.9x4.9mm_P1.27mm	U4
1	2N3905	TO-92_Inline	Q1
1	MMBT3904 2N3904	TO-92_Inline	Q2
1	G01N20LE	SOT-23	Q3
1	2N3904	TO-92_Inline	Q4
1	USB-PWR	USB_Micro-B_Amphenol_10103594-0001LF_Horizontal_modified	J1
1	LOOP PWR	CUI_PJ-037B	J2
1	COMM-DCE-10 MuKOB IF	PinHeader_1x07_P2.54mm_Vertical	J4
1	RPI-GPIO40 KEY/PDL	CUI_SJ1-3534NG-audio-jack	J5
2	1x2 Header	PinHeader_1x02_P2.54mm_Vertical	JP1, JP3
1	KEY-IN	PinHeader_1x02_P2.54mm_Vertical	JP2
1	5V-SRC	PinHeader_1x03_P2.54mm_Vertical	OPa1
1	LoopDbgPwr	PinHeader_1x02_P2.54mm_Vertical	OPa2
1	SNDR/KOB	TerminalBlock_Philmore_TB132_1x02_P5.00mm_Horizontal	ST1
1	LOOP RES	TerminalBlock_Philmore_TB132_1x02_P5.00mm_Horizontal	ST2
1	CLOSER	SW-TGL-Micro-DPST-CIT	SW1
1	KEY/DOT	SW_PUSH_SMD_1P1T_NO_6x6mm	SW2
1	DASH	SW_PUSH_SMD_1P1T_NO_6x6mm	SW3

Show 27 more

Qty	Part	Footprint	Refs
1	LP2	PinHeader_1x01_P2.54mm_Vertical	TP1
1	SE	PinHeader_1x01_P2.54mm_Vertical	TP2
1	RV	PinHeader_1x01_P2.54mm_Vertical	TP3
1	LS	PinHeader_1x01_P2.54mm_Vertical	TP4
1	KS-	PinHeader_1x01_P2.54mm_Vertical	TP5
1	SNDR	LED_SMD_SIDEVIEW_Harvatek	LED1
1	HDS20M MBR0560LT1G	D_SOD-123	D1
1	MBR0560LT1G 1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D2
1	1N4007 1N4148	D_SOD-123	D3
1	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D4
2	1N4148	D_SOD-123	D5, D6
2	1N4148 MBR0560LT1G	D_SOD-123	D7, D8
1	10UF 1uF	C_0201_0603Metric_Pad0.64x0.40mm_HandSolder	C1
1	0.1U 1uF	C_0201_0603Metric_Pad0.64x0.40mm_HandSolder	C2
1	0.1U 10uf	CP_Radial_D8.0mm_P5.00mm	C3
5	0.1U 0.1u	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C4, C5, C6, C7, C8
1	1.0U 0.1u	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C9
1	20K 3.3k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R1
1	1k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R2
1	10k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R3
1	330 270	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R4
1	20k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R5
1	10K 20k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R6
1	10K 100	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R7
1	4.7K 20k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R8
1	20K DNP	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R9
1	47K 1k	R_0402_1005Metric_Pad0.72x0.64mm_HandSolder	R10

KOB-Sounder Interface design files

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

KOB-Sounder Interface: common questions

How big is the KOB-Sounder Interface PCB?

The KOB-Sounder Interface measures 104.1 × 78.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KOB-Sounder Interface?

54 components, from 47 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the KOB-Sounder Interface design files?

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

Can I use the KOB-Sounder Interface design in my own project?

Yes, under the terms of its MIT license, which MorseKOB chose for the repository.

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