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PCB avr dx unbricker

k-takata·PCB_avr_dx_unbricker

PCB avr dx unbricker layout, top view — open source AVR/Arduino board by k-takata

About the PCB avr dx unbricker

PCB avr dx unbricker is an open source AVR/Arduino PCB design by k-takata, published on GitHub. It is a 2-layer board measuring 72 × 47.5 mm, with 36 components from 29 distinct parts.

Its main chip is the ATtiny402-SS, from the AVR/Arduino family. Other key parts include the AVR64DD28-I/SP, ICL7660 and ATtiny402 DIP Socket. By type, the board carries 8 diodes, 6 connectors, 6 resistors, 4 ICs, 4 transistors and 4 capacitors.

It belongs with the usb & debug tools designs in this gallery.

From the project

UPDI High Voltage programmer for AVR Dx/Ex series

A new project that also supports ATtiny is available: UPDI Unbricker

A 7.5 V HV-capable UPDI unbricker for AVR Dx/Ex series devices. It restores normal UPDI programming by injecting an HV pulse into devices where UPDI was disabled. * It does not support 12 V HV programming for ATtiny series devices.

This is a UPDI (Unified Program and Debug Interface) programmer that supports 7.5 V high-voltage (HV) programming for AVR Dx/Ex series devices. (It does not support 12 V HV programming for ATtiny series devices.) If UPDI pin settings were changed intentionally or accidentally and a normal UPDI…

PCB avr dx unbricker, from the project README
From the project README

Main components on the PCB avr dx unbricker

AVR64DD28-I/SPATtiny402-SSICL7660ATtiny402 DIP Socket

PCB avr dx unbricker bill of materials (BOM)

36 components, 29 distinct parts.

QtyPartRefs
1
AVR64DD28-I/SP
U1
1
ATtiny402-SS
U2
1
ICL7660
U3
1
ATtiny402 DIP Socket
U4
1
BSS138
Q1
1
BSS84
Q2
1
Q_NMOS_GDS
Q3
1
Q_PMOS_GDS
Q4
1
AE-CH9102F
J1
1
TTL Serial in
J2
1
UPDI
J3
1
TTL Serial out
J4
1
RTS / DTR
J5
1
Target
J6
1
UPDI / Serial
SW1
1
Power
SW2
1
SW_Push
SW3
1
~
TP1
4
BAT43
D1, D3, D4, D8
1
LED
D2
Show 9 more
QtyPartRefs
1
7.5V
D5
1
3V
D6
1
5.1V
D7
2
0.1μ
C1, C2
2
1μ
C3, C4
1
470
R1
3
4.7k
R2, R3, R6
1
10k
R4
1
100k
R5

PCB avr dx unbricker design files

The KiCad project lives in the k-takata/PCB_avr_dx_unbricker repository on GitHub; these links point at the commit this page was built from.

PCB avr dx unbricker: common questions

What microcontroller does the PCB avr dx unbricker use?

The PCB avr dx unbricker is built around the ATtiny402-SS, from the AVR/Arduino family.

How big is the PCB avr dx unbricker?

The PCB avr dx unbricker measures 72 × 47.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PCB avr dx unbricker?

36 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the PCB avr dx unbricker design files?

From the k-takata/PCB_avr_dx_unbricker repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PCB avr dx unbricker design in my own project?

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

Can I test firmware for the PCB avr dx unbricker 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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