HardLabs

ABK-20

8BitMixtape·ABK-20·hardware/ABK-20.kicad_pcb

ABK-20

About the ABK-20 PCB

ABK-20 is an open source AVR/Arduino PCB design by 8BitMixtape, published on GitHub. It is a 2-layer board, with 73 components from 33 distinct parts.

Its main chip is the ATTINY85-20SU, from the AVR/Arduino family. Other key parts include the PAM8002 and 7805. By type, the board carries 19 resistors, 8 capacitors, 6 connectors, 4 switches, 4 diodes and 3 ICs.

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

From the project

Total redesign of the interface and 20 neopixels, still based on 8Bit Mixtape, but different...

8-Bit Algorithmic Audio Synthesizer with 5×4 NeoPixel Matrix Display

The ABK-20 is a modernized desktop hardware console redesign of the legendary 8Bit Mixtape. Powered by a Microchip ATtiny85 running an 8-bit algorithmic sound engine (bytebeats, wavetable, granular, and punk console synths), it features an illuminated 20-LED (5×4) visual display screen, tactile physical controls, and instant sound sketch loading via the AudioBoot bootloader.

Main components on the ABK-20

ATTINY85-20SUPAM80027805

ABK-20 bill of materials (BOM)

73 components, 33 distinct parts.

QtyPartRefs
1
ATTINY85-20SU
U1
1
PAM8002
U2
1
7805
U3
2
CONN_01X04
J1, J2
1
CONN_02X03
J3
1
Con_3-5V
J4
1
USB_C_6P
J5
1
Sync_Jumper
J6
2
Battery_Cell
BT1, BT2
2
JACK_TRS_6PINS
Jack1, Jack2
20
SK6812
NEO1, NEO2, NEO3, NEO4, NEO5, NEO6, NEO7, NEO8 +12
1
POT 10K lin
POT2-CV1
1
POT 10k
POT3-Vol1
1
SW_SPST
SW1
1
SW_Push
SW2
1
SW_SPDT_MSM
SW3
1
SW_Push
SW4
1
Speaker
Speaker1
1
SVG2SHENZHEN
board1
1
POT_SLIDE_LED
RV1
Show 13 more
QtyPartRefs
3
SS14
D1, D2, D3
1
LED
D-POW1
4
100nF
C1, C2, C3, C8
1
10uF
C4
2
1uF
C5, C6
1
220uF
C7
9
22K
R1, R2, R3, R4, R5, R6, R7, R14 +1
2
330
R8, R9
2
4.7K
R10, R11
2
1K
R12, R13
1
6.8K
R16
2
5.1K
R17, R18
1
0
R99

ABK-20 design files

The KiCad project lives in the 8BitMixtape/ABK-20 repository on GitHub; these links point at the commit this page was built from.

ABK-20: common questions

What microcontroller does the ABK-20 use?

The ABK-20 is built around the ATTINY85-20SU, from the AVR/Arduino family.

How big is the ABK-20 PCB?

The ABK-20 has 2 copper layers and is 1.6 mm thick.

How many components are on the ABK-20?

73 components, from 33 distinct parts. The full bill of materials is listed on this page.

Where can I download the ABK-20 design files?

From the 8BitMixtape/ABK-20 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ABK-20 design in my own project?

The repository has no license, so all rights stay with 8BitMixtape. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the ABK-20 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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