HardLabs

PLC-14500

nicolacimmino·PLC-14500·board/plc14500/plc14500.kicad_pcb

PLC-14500 PCB layout, top view — open source AVR/Arduino board by nicolacimmino
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About the PLC-14500 PCB

PLC-14500 is an open source AVR/Arduino PCB design by nicolacimmino, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 160.1 × 101 mm, with 160 components from 23 distinct parts.

Its main chip is the Arduino Nano, from the AVR/Arduino family. Other key parts include the 74HC14, 4051, NE555, 4099 and 74HC590A. By type, the board carries 56 resistors, 53 diodes, 19 capacitors, 18 switches and 14 ICs.

It belongs with the retro computing designs in this gallery.

From the project

Retro trainer board based on the MC14500 1-bit ICU. The project is OSHW certified and a ready to assemble kit is available on Tindie.

- Moved LED labelled HI to the left of LO (to match switch direction)

- Added 47K in series to U2 Pin3 OUT (to remove gosthing of outputs on inputs LEDs due to MC14500 W line timing)

- Passed OUT7 through a NOT before triggering TMR0, left LED direct to OUT7 (NE555 triggers on low which makes it hakward without negation as the monostable triggers always once on reset)

Main components on the PLC-14500

74HC144051NE5554099Arduino Nano74HC590ALH5168MC145004011

PLC-14500 bill of materials (BOM)

160 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
74HC14
U1, U3, U11
2
4051
U2, U14
2
NE555
U4, U9
2
4099
U5, U13
1
Arduino Nano
U6
1
74HC590A
U7
1
LH5168
U8
1
MC14500
U10
1
4011
U12
9
Push Button
S1, S2, S3, S4, S9, S10, S11, S15 +1
9
Switch DPDT
S5, S6, S7, S8, S12, S13, S14, S16 +1
40
LED 3MM Red
D1, D2, D3, D4, D5, D6, D7, D8 +32
5
LED 3MM Yellow
D18, D19, D28, D33, D38
6
LED 3MM Orange
D39, D41, D42, D50, D52, D53
2
1N4148
D40, D51
17
100NF
100nF
C1, C2, C3, C5, C6, C8, C9, C10 +9
1
10UF
10uF
C4
1
470UF
470uF
C7
9
47K
R1, R2, R3, R4, R9, R10, R11, R22 +1
41
820R
R5, R6, R7, R8, R12, R13, R14, R16 +33
Show 3 more
QtyPartRefs
1
2K2
R15
2
1K
R30, R31
3
10K
R50, R51, R54

PLC-14500 design files

The KiCad project lives in the nicolacimmino/PLC-14500 repository on GitHub; these links point at the commit this page was built from.

PLC-14500: common questions

What microcontroller does the PLC-14500 use?

The PLC-14500 is built around the Arduino Nano, from the AVR/Arduino family.

How big is the PLC-14500 PCB?

The PLC-14500 measures 160.1 × 101 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PLC-14500?

160 components, from 23 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 PLC-14500 design files?

From the nicolacimmino/PLC-14500 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 PLC-14500 design in my own project?

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

Can I test firmware for the PLC-14500 without the hardware?

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

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