HardLabs

TimerModule

crempp·ucpu·cpu/Timer/TimerModule.kicad_pcb

TimerModule PCB layout, top view — open source board by crempp

About the TimerModule PCB

TimerModule is an open source PCB design by crempp, published on GitHub. It is a 2-layer board measuring 90.7 × 58.6 mm, with 17 components from 12 distinct parts.

Other key parts include the LM555, 74LS00 and 74LS365. By type, the board carries 6 capacitors, 4 ICs, 4 resistors, 2 diodes and 1 connector.

From the project

16bit CPU made from TTL Logic Chips

This is a 16bit pipelined CPU designed on a breadboard and produced in modular component boards.

My objective in this project is to learn electronics, CPU design and build a fully functional CPU that can be updated, added to and further developed easily.

The CPU is designed around four general purpose 16 bit registers four 16 bit address registers ALU supporting addition, subtraction, shift and bitwise operations piplined instructions * banked memory with a base of 64k, expandable to about 1.5 megabytes (max TBD)

TimerModule, from the project README
From the project README

Main components on the TimerModule

LM55574LS0074LS365

TimerModule bill of materials (BOM)

17 components, 12 distinct parts.

QtyPartRefs
1
LM555
U1
2
74LS00
U2, U3
1
74LS365
U4
1
Interconnect
J1
1
~{CLK}
D1
1
CLK
D2
1
1uF
C1
1
0.01uF
C2
4
0.1uF
C3, C4, C5, C6
1
100R
R1
1
1K
R2
2
220R
R3, R4

TimerModule design files

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

TimerModule: common questions

How big is the TimerModule PCB?

The TimerModule measures 90.7 × 58.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TimerModule?

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

Where can I download the TimerModule design files?

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

Can I use the TimerModule design in my own project?

The repository has no license, so all rights stay with crempp. Use it as a reference, and ask the author before reusing the design.

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