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Timer Unit

oberrow·i8088-computer·kicad/Timer_Unit/Timer_Unit.kicad_pcb

Timer Unit PCB layout, top view — open source board by oberrow

About the Timer Unit PCB

Timer Unit is an open source PCB design by oberrow, published on GitHub under the MIT license. It is a 2-layer board measuring 58 × 47 mm, with 12 components from 7 distinct parts.

Other key parts include the NE555P, 74LV8154, 74LS139 and 74LS540. By type, the board carries 5 capacitors, 4 ICs, 2 resistors and 1 connector.

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

From the project

Code for an i8088-based non-PC compatible breadboard computer

Main components on the Timer Unit

NE555P74LV815474LS13974LS540

Timer Unit bill of materials (BOM)

12 components, 7 distinct parts.

QtyPartRefs
1
NE555P
U1
1
74LV8154
U2
1
74LS139
U3
1
74LS540
U4
1
Conn_01x28
J1
5
C
C1, C2, C3, C4, C5
2
R
R1, R2

Timer Unit design files

The KiCad project lives in the oberrow/i8088-computer repository on GitHub; these links point at the commit this page was built from.

Timer Unit: common questions

How big is the Timer Unit PCB?

The Timer Unit measures 58 × 47 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Timer Unit?

12 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Timer Unit design files?

From the oberrow/i8088-computer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Timer Unit design in my own project?

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

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