Universal-ITX-Backplane

spark2k06·Universal-ITX-Backplane

Universal-ITX-Backplane PCB layout, top view — open source board by spark2k06

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About the Universal-ITX-Backplane PCB

Universal-ITX-Backplane is an open source PCB design by spark2k06, published on GitHub under the CERN-OHL-1.2 license. It is a 4-layer board measuring 181 × 184.9 mm, with 65 components from 34 distinct parts.

Other key parts include the 555 and 7905. By type, the board carries 19 resistors, 17 capacitors, 9 diodes, 7 connectors, 2 ICs and 2 switches.

It belongs with the dev boards & breakouts and retro computing designs in this gallery.

From the project

Build a retro ISA or PC / 104 slot-based system on an ITX format board

This backplane is initially intended to be used with Sergey Kiselev's Micro8088 or xi8088 PC clones, among others system powered by x86 architecture. However, other old systems could also be developed using FPGAs built or adapted to ISA or PC / 104 type slots, plus other accessories based on these.

More information of this project in my Hackaday account: https://hackaday.io/project/175340-universal-itx-backplane

Universal-ITX-Backplane, from the project README — From the project README

Main components on the Universal-ITX-Backplane

Universal-ITX-Backplane bill of materials (BOM)

65 components, 34 distinct parts.

Qty	Part	Footprint	Refs
1	555	DIP-8_W7.62mm_LongPads	U27
1	7905	TO220-3_Soldertab	U30
1	2N3904	TO-92	Q2
1	VGA IN (PC/104)	PinSocket_2x07_P2.54mm_Vertical	J2
1	DB9 P1	IDC-Header_2x05_P2.54mm_Vertical	J6
1	DB9 P2	IDC-Header_2x05_P2.54mm_Vertical	J8
1	PWR_HAT	PinHeader_2x04_P2.54mm_Vertical	J9
1	MONO <-> COLOR	SW-SK-42D01-G	P1
1	ATX Power	Molex_Mini-Fit_Jr_5569-20A2_2x10_P4.20mm_Horizontal	P2
1	Front Panel	PinHeader_2x05_P2.54mm_Horizontal	P3
3	BUSAT_HOST	ISA16	ISA1, ISA2, ISA3
3	BUSXT_HOST	Conn_Edge_ISA8_Longpads	ISA4, ISA5, ISA6
1	PC104	PC104_Platform	PC104
1	PC104_16	PinSocket_2x20_P2.54mm_Vertical	PC104_16
1	Monochrome Select	SW_DIP_SPSTx04_Piano_10.8x11.72mm_W7.62mm_P2.54mm	SW1
1	Power	SW_PUSH_6mm	SW2
1	+5V	LED_D3.0mm	D1
1	5VSB	LED_D3.0mm	D2
1	+12V	LED_D3.0mm	D3
1	-12V	LED_D3.0mm	D4

Show 14 more

Qty	Part	Footprint	Refs
1	-5V	LED_D3.0mm	D5
4	D_Schottky	D_DO-35_SOD27_P7.62mm_Horizontal	D6, D7, D8, D9
15	10uF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C1, C2, C3, C6, C7, C9, C10, C13 +7
1	1uF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C23
1	0.1uF	C_Disc_D4.3mm_W1.9mm_P5.00mm	C24
1	33R	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R1
1	9.1R	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R2
1	100R	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R3
1	75R	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R4
1	220	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R5
1	100k	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R6
9	10K	R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R7, R8, R9, R10, R11, R12, R13, R14 +1
2	4.7K	R_Array_SIP5	RN1, RN2
2	10K	R_Array_SIP9	RN3, RN4

Universal-ITX-Backplane design files

The KiCad project lives in the spark2k06/Universal-ITX-Backplane repository on GitHub; these links point at the commit this page was built from.

LayoutUniversal-ITX-Backplane.kicad_pcb

Universal-ITX-Backplane: common questions

How big is the Universal-ITX-Backplane PCB?

The Universal-ITX-Backplane measures 181 × 184.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Universal-ITX-Backplane?

65 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Universal-ITX-Backplane design files?

From the spark2k06/Universal-ITX-Backplane repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Universal-ITX-Backplane design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which spark2k06 chose for the repository.

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