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Prrplsattiny20

jimktrains·prrplsattiny20·pcb/prrplsattiny20.kicad_pcb

Prrplsattiny20 PCB layout, top view — open source AVR/Arduino board by jimktrains

About the Prrplsattiny20 PCB

Prrplsattiny20 is an open source AVR/Arduino PCB design by jimktrains, published on GitHub. It is a 4-layer board measuring 8.2 × 8.2 mm, with 18 components from 7 distinct parts.

Its main chip is the ATTINY20-UUR, from the AVR/Arduino family. By type, the board carries 7 connectors, 7 diodes, 2 capacitors, 1 IC and 1 resistor.

It belongs with the displays & leds designs in this gallery.

From the project

PRR Position Light Signals based on an ATTiny20 ----------------------------------------------- Thumb for scale.

PRR Position Light Signals based on an ATTiny20 ----------------------------------------------- Thumb for scale.

The Pennsylvania Railroad (PRR), almost uniquely among railroads, used Position Light Signals (PLS) [[1]](https://en.wikipedia.org/wiki/NorthAmericanrailroadsignals#Positionlight_signals) [[2]](https://railroadsignals.us/signals/pl/pl.htm). (The Norfolk & Western used Colored Position Lights (CPL) [[2]]([https://railroadsignals.us/signals/pl/pl.htm) which were similar.)

Prrplsattiny20, from the project README
From the project README

Main components on the Prrplsattiny20

ATTINY20-UUR

Prrplsattiny20 bill of materials (BOM)

18 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATTINY20-UUR
ATtiny20-UUR
U1
1
CONN_02X08_COUNTER_CLOCKWISE
Conn_02x08_Counter_Clockwise
J1
6
CONN_01X01
Conn_01x01
J1001, J1002, J1003, J1004, J1005, J1006
7
C779450
YELLOW LED
D1, D2, D3, D4, D5, D6, D7
1
100NF
100nF
C1
1
22μF
C1001
1
1M
R1

Prrplsattiny20 design files

The KiCad project lives in the jimktrains/prrplsattiny20 repository on GitHub; these links point at the commit this page was built from.

Prrplsattiny20: common questions

What microcontroller does the Prrplsattiny20 use?

The Prrplsattiny20 is built around the ATTINY20-UUR, from the AVR/Arduino family.

How big is the Prrplsattiny20 PCB?

The Prrplsattiny20 measures 8.2 × 8.2 mm, has 4 copper layers and is 0.6 mm thick.

How many components are on the Prrplsattiny20?

18 components, from 7 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 Prrplsattiny20 design files?

From the jimktrains/prrplsattiny20 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 Prrplsattiny20 design in my own project?

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

Can I test firmware for the Prrplsattiny20 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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