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Alphabets V2 ATtiny44 millable ring module

TheBeachLab·alphabets·V2/Hardware/Prototype/electronics/attiny44-ring/attiny44-ring.kicad_pcb

Alphabets V2 ATtiny44 millable ring module layout, top view — open source AVR/Arduino board by TheBeachLab
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About the Alphabets V2 ATtiny44 millable ring module

Alphabets V2 ATtiny44 millable ring module is an open source AVR/Arduino PCB design by TheBeachLab, published on GitHub under the MIT license. It is a 2-layer board measuring 50 × 50 mm, with 21 components from 21 distinct parts.

Its main chip is the ATtiny44A-SS, from the AVR/Arduino family. By type, the board carries 14 jumpers, 3 connectors, 2 capacitors, 1 IC and 1 resistor.

It belongs with the robotics & motion, displays & leds and power & battery designs in this gallery.

From the project

Open Source Mechanical Split Flap Display, AKA Solari display

This directory contains the editable KiCad 10 design for one Alphabets V2 split-flap module. The ATtiny44 participates in the synchronous serial ring defined in the prototype module protocol and drives the four logic inputs of the external stepper-driver board supplied with the motor. Its AVR C firmware is in ATtiny44 module firmware.

- U1: ATtiny44A-SS in SOIC-14. - J1: one 2x3, 2.54 mm, surface-mount chain connector. - J5: one standard 2x3, 2.54 mm, surface-mount AVR ISP connector placed immediately below U1. - J3: four logic outputs for IN1 through IN4 on the external driver. - R2: 10…

Main components on the Alphabets V2 ATtiny44 millable ring module

ATtiny44A-SS

Alphabets V2 ATtiny44 millable ring module bill of materials (BOM)

21 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATtiny44A-SS
U1
1
CHAIN_RING
J1
1
STEPPER_DRIVER_IN
J3
1
AVR_ISP_2X3
J5
1
0R CLOCK input jumper 1206
JP5
1
0R LATCH input jumper 1206
JP6
1
0R DATA input jumper 1206
JP7
1
0R CHAIN DATA_OUT jumper 1206
JP8
1
0R CLOCK MCU bridge 1206
JP16
1
0R DATA chain bridge 1206
JP17
1
0R MCU power bridge 1206
JP18
1
0R CHAIN power bridge 1206
JP19
1
0R ISP VCC bridge 1206
JP20
1
0R POWER crossover 1 1206
JP21
1
0R LATCH crossover 1206
JP22
1
0R POWER crossover 2 1206
JP23
1
0R ISP RESET crossover 1206
JP24
1
0R ISP SCK crossover 1206
JP25
1
100n MCU 1206
C1
1
10u BULK 1206
C2
Show 1 more
QtyPartRefs
1
10k RESET pull-up 1206
R2

Alphabets V2 ATtiny44 millable ring module design files

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

Alphabets V2 ATtiny44 millable ring module: common questions

What microcontroller does the Alphabets V2 ATtiny44 millable ring module use?

The Alphabets V2 ATtiny44 millable ring module is built around the ATtiny44A-SS, from the AVR/Arduino family.

How big is the Alphabets V2 ATtiny44 millable ring module?

The Alphabets V2 ATtiny44 millable ring module measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Alphabets V2 ATtiny44 millable ring module?

21 components, from 21 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 Alphabets V2 ATtiny44 millable ring module design files?

From the TheBeachLab/alphabets 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 Alphabets V2 ATtiny44 millable ring module design in my own project?

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

Can I test firmware for the Alphabets V2 ATtiny44 millable ring module 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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